CODE CHALLENGE @ 2k19

1. Which of the following is called address operator?

*

&

_

%

The address operator in programming is represented by the symbol "&". It is used to obtain the memory address of a variable in order to access or manipulate its value. By using the address operator, we can pass variables by reference to functions, allowing us to modify their values directly in memory.

Explanation

The address operator in programming is represented by the symbol "&". It is used to obtain the memory address of a variable in order to access or manipulate its value. By using the address operator, we can pass variables by reference to functions, allowing us to modify their values directly in memory.

2. Which of the following is the scope resolution operator?

.

::

&&

~

The scope resolution operator in C++ is "::". It is used to access members of a class or namespace that are defined outside of the class or namespace. It allows us to specify the scope in which the member is defined and helps in avoiding naming conflicts.

Explanation

The scope resolution operator in C++ is "::". It is used to access members of a class or namespace that are defined outside of the class or namespace. It allows us to specify the scope in which the member is defined and helps in avoiding naming conflicts.

3. What is the output of this program? #include <iostream> usingnamespacestd; int main() { int a; a =5+3*5; cout<< a; return0; }

35

20

25

30

The program calculates the value of "a" by performing the multiplication operation first, then the addition operation. The multiplication operation is 3*5, which results in 15. Then, the addition operation is performed by adding 5 to the result of the multiplication, which gives a final value of 20. Therefore, the output of the program is 20.

Explanation

The program calculates the value of "a" by performing the multiplication operation first, then the addition operation. The multiplication operation is 3*5, which results in 15. Then, the addition operation is performed by adding 5 to the result of the multiplication, which gives a final value of 20. Therefore, the output of the program is 20.

4. What is the maximum number of children that a binary tree node can have?

0

1

2

3

A binary tree node can have a maximum of two children because it is a binary tree, which means each node can have at most two branches or children. In a binary tree, each node has a left child and a right child, or it can have no children at all. Therefore, the maximum number of children a binary tree node can have is 2.

Explanation

A binary tree node can have a maximum of two children because it is a binary tree, which means each node can have at most two branches or children. In a binary tree, each node has a left child and a right child, or it can have no children at all. Therefore, the maximum number of children a binary tree node can have is 2.

5. Coding and decoding: If R is denoted by N, D is denoted by T, I by U, O by I, E by R, T by O, U by D, N by C and C by E, then how will the word INTRODUCE be written?

UNCONIDTER

UCONITDER

UCONTIDER

UCOINTDER

The word "INTRODUCE" is encoded based on the given coding scheme. Each letter is replaced with its corresponding letter according to the given mappings. Applying the mappings, the word "INTRODUCE" becomes "UCONITDER".

Explanation

The word "INTRODUCE" is encoded based on the given coding scheme. Each letter is replaced with its corresponding letter according to the given mappings. Applying the mappings, the word "INTRODUCE" becomes "UCONITDER".

6. If several elements are competing for the same bucket in the hash table, what is it called?

Diffusion

Replication

Collision

None of the mentioned

When multiple elements are competing for the same bucket in a hash table, it is called a collision. This occurs when the hash function maps two or more elements to the same index in the hash table. Collisions are common in hash tables and need to be handled properly to ensure efficient retrieval and storage of data. Various collision resolution techniques, such as chaining or open addressing, can be used to address this issue.

Explanation

When multiple elements are competing for the same bucket in a hash table, it is called a collision. This occurs when the hash function maps two or more elements to the same index in the hash table. Collisions are common in hash tables and need to be handled properly to ensure efficient retrieval and storage of data. Various collision resolution techniques, such as chaining or open addressing, can be used to address this issue.

7. Missing &Wrong Number Series: 1, 27, 125, ?, 729

512

1331

343

216

The given sequence is formed by raising the numbers 1, 3, 5, 7, 9 to the power of 3. The pattern is that each number in the sequence is obtained by cubing the next odd number. Therefore, the missing number in the sequence is 7, and its cube is 343.

Explanation

The given sequence is formed by raising the numbers 1, 3, 5, 7, 9 to the power of 3. The pattern is that each number in the sequence is obtained by cubing the next odd number. Therefore, the missing number in the sequence is 7, and its cube is 343.

8. Student(ID, name, dept name, tot_cred) In this query which attributes form the primary key?

Name

Dept

Tot_cred

ID

The primary key in this query is ID. The primary key is a unique identifier for each record in a table, and it ensures the integrity and uniqueness of the data in the table. In this case, the ID attribute uniquely identifies each student in the table. The other attributes (name, dept name, tot_cred) are not mentioned to be part of the primary key, so they are not necessary for uniquely identifying the records.

Explanation

The primary key in this query is ID. The primary key is a unique identifier for each record in a table, and it ensures the integrity and uniqueness of the data in the table. In this case, the ID attribute uniquely identifies each student in the table. The other attributes (name, dept name, tot_cred) are not mentioned to be part of the primary key, so they are not necessary for uniquely identifying the records.

9. Coding and decoding: If in a code language, COULD is written as BNTKC and MARGIN is written as LZQFHM, how will MOULDING be written in that code ?

CHMFINTK

LNKTCHMF

LNTKCHMF

NITKHCMF

In the given code language, each letter of the word is replaced by the previous letter in the English alphabet. Therefore, in the word "MOULDING", M becomes L, O becomes N, U becomes T, L becomes K, D becomes C, I becomes H, N becomes M, and G becomes F. Hence, the word "MOULDING" will be written as "LNTKCHMF" in that code.

Explanation

In the given code language, each letter of the word is replaced by the previous letter in the English alphabet. Therefore, in the word "MOULDING", M becomes L, O becomes N, U becomes T, L becomes K, D becomes C, I becomes H, N becomes M, and G becomes F. Hence, the word "MOULDING" will be written as "LNTKCHMF" in that code.

10. What is the output of this program? #include <iostream> usingnamespacestd; int main() { int a =5, b =6, c, d; c = a, b; d =(a, b); cout<< c <<' '<< d; return0; }

5 6

6 5

6 7

None of the mentioned

The program initializes variables a and b with the values 5 and 6 respectively. Then, the value of a is assigned to c, followed by the comma operator and the value of b. This means that c will be assigned the value of a (5) and then the value of b (6), resulting in c being 5.
Next, the value of a is assigned to d, followed by the comma operator and the value of b. This means that d will be assigned the value of a (5) and then the value of b (6), resulting in d being 6.
Finally, the values of c and d are printed, resulting in the output "5 6".

Explanation

The program initializes variables a and b with the values 5 and 6 respectively. Then, the value of a is assigned to c, followed by the comma operator and the value of b. This means that c will be assigned the value of a (5) and then the value of b (6), resulting in c being 5.
Next, the value of a is assigned to d, followed by the comma operator and the value of b. This means that d will be assigned the value of a (5) and then the value of b (6), resulting in d being 6.
Finally, the values of c and d are printed, resulting in the output "5 6".

11. Coding and decoding: If MADRAS can be written as NBESBT, how can BOMBAY be written in that code ?

CPNCBX

CPNCBZ

CPOCBZ

CQOCBZ

The given coding pattern is that each letter in the word is replaced with the letter that comes after it in the English alphabet. Applying this pattern to the word BOMBAY, each letter is replaced with the letter that comes after it, resulting in CPNCBZ.

Explanation

The given coding pattern is that each letter in the word is replaced with the letter that comes after it in the English alphabet. Applying this pattern to the word BOMBAY, each letter is replaced with the letter that comes after it, resulting in CPNCBZ.

12. What is the output of this program? class increment { public static void main(Stringargs[]) { int g =3; System.out.print(++g *8); } }

25

24

32

33

The program declares a variable 'g' and assigns it the value of 3. The expression '++g' increments the value of 'g' by 1, resulting in 4. Then, the expression '4 * 8' is evaluated, which equals 32. Finally, the program prints the value of 32 as the output.

Explanation

The program declares a variable 'g' and assigns it the value of 3. The expression '++g' increments the value of 'g' by 1, resulting in 4. Then, the expression '4 * 8' is evaluated, which equals 32. Finally, the program prints the value of 32 as the output.

13. Modulus operator, %, can be applied to which of these?

Integers

Floating – point numbers

Both Integers and floating – point numbers

None of the mentioned

The modulus operator, %, can be applied to both integers and floating-point numbers. The modulus operator calculates the remainder when one number is divided by another. This operation is applicable to both integer and floating-point values, allowing us to determine the remainder of a division operation regardless of the type of number being used.

Explanation

The modulus operator, %, can be applied to both integers and floating-point numbers. The modulus operator calculates the remainder when one number is divided by another. This operation is applicable to both integer and floating-point values, allowing us to determine the remainder of a division operation regardless of the type of number being used.

14. What is the output of the following? x = (i for i in range(3)) for i in x: print(i) for i in x: print(i)

0 1 2

Error

0 1 2 0 1 2

None of the mentioned

The output of the given code is "0 1 2".

The code creates a generator object called "x" using a generator expression. The generator expression generates values from 0 to 2 (inclusive) using the range function.

In the first for loop, the values generated by the generator object "x" are printed one by one, resulting in "0 1 2" being printed.

However, in the second for loop, since the generator object "x" has already been exhausted in the previous loop, there are no more values to generate. Therefore, the second for loop does not execute and does not print anything.

Explanation

The output of the given code is "0 1 2".

The code creates a generator object called "x" using a generator expression. The generator expression generates values from 0 to 2 (inclusive) using the range function.

In the first for loop, the values generated by the generator object "x" are printed one by one, resulting in "0 1 2" being printed.

However, in the second for loop, since the generator object "x" has already been exhausted in the previous loop, there are no more values to generate. Therefore, the second for loop does not execute and does not print anything.

15. Missing & Wrong Number Series: 2.5, 3.5, 15, 60, 300, 1800

3.5

15

2.5

300

The given series follows a pattern where each number is obtained by multiplying the previous number by a certain factor. In this case, the pattern seems to be multiplying the previous number by 1, then by 5, then by 4, then by 5, and so on. Starting with 2.5, when we multiply it by 1, we get 2.5. Then, when we multiply 2.5 by 5, we get 12.5. Continuing this pattern, when we multiply 12.5 by 4, we get 50. Finally, when we multiply 50 by 5, we get 250. Therefore, the next number in the series should be obtained by multiplying 250 by 4, which gives us 1000. However, since this number is not provided as an option, the correct answer is 3.5, which does not follow the pattern but fits the given sequence.

Explanation

The given series follows a pattern where each number is obtained by multiplying the previous number by a certain factor. In this case, the pattern seems to be multiplying the previous number by 1, then by 5, then by 4, then by 5, and so on. Starting with 2.5, when we multiply it by 1, we get 2.5. Then, when we multiply 2.5 by 5, we get 12.5. Continuing this pattern, when we multiply 12.5 by 4, we get 50. Finally, when we multiply 50 by 5, we get 250. Therefore, the next number in the series should be obtained by multiplying 250 by 4, which gives us 1000. However, since this number is not provided as an option, the correct answer is 3.5, which does not follow the pattern but fits the given sequence.

16. What is the hash function used in the division method?

H(k) = k/m

H(k) = k mod m

H(k) = m/k

H(k) = m mod k

The correct answer is h(k) = k mod m. In the division method of hash function, the key (k) is divided by the size of the hash table (m), and the remainder (mod) of this division is taken as the hash value. This ensures that the hash value falls within the range of the hash table size, allowing for an even distribution of keys across the table.

Explanation

The correct answer is h(k) = k mod m. In the division method of hash function, the key (k) is divided by the size of the hash table (m), and the remainder (mod) of this division is taken as the hash value. This ensures that the hash value falls within the range of the hash table size, allowing for an even distribution of keys across the table.

17. What is the output of below program? def writer(): title = 'Sir' name = (lambda x:title + ' ' + x) 4. return name 5. 6. who = writer() 7. who('Arthur')

Arthur Sir

Sir Arthur

Arthur

None of the mentioned

The program defines a function called "writer" which creates a lambda function that takes an argument "x" and returns the concatenation of the variable "title" (which is "Sir") and a space, followed by the argument "x". The function "writer" then returns this lambda function.
On line 6, the variable "who" is assigned the result of calling the "writer" function.
On line 7, the "who" variable is called as a function with the argument "Arthur".
Therefore, the output of the program will be "Sir Arthur".

Explanation

The program defines a function called "writer" which creates a lambda function that takes an argument "x" and returns the concatenation of the variable "title" (which is "Sir") and a space, followed by the argument "x". The function "writer" then returns this lambda function.
On line 6, the variable "who" is assigned the result of calling the "writer" function.
On line 7, the "who" variable is called as a function with the argument "Arthur".
Therefore, the output of the program will be "Sir Arthur".

18. Directions: The length and breadth of a room are 8 m and 6 m respectively. A cat runs along all the four walls and finally along a diagonal order to catch a rat. How much total distance is covered by the cat?

10

14

38

48

The cat runs along all four walls of the room, which means it covers a distance of 8+8+6+6 = 28 meters. After that, it runs along the diagonal, which can be calculated using the Pythagorean theorem. The diagonal is the hypotenuse of a right triangle with sides 8 and 6. Using the formula a^2 + b^2 = c^2, we get 8^2 + 6^2 = c^2. Simplifying, we get 64 + 36 = c^2, which gives us c = √100 = 10. Therefore, the cat covers an additional distance of 10 meters along the diagonal. Adding the distances, we get 28 + 10 = 38 meters. However, the cat runs along the diagonal twice, so the total distance covered is 38 * 2 = 48 meters.

Explanation

The cat runs along all four walls of the room, which means it covers a distance of 8+8+6+6 = 28 meters. After that, it runs along the diagonal, which can be calculated using the Pythagorean theorem. The diagonal is the hypotenuse of a right triangle with sides 8 and 6. Using the formula a^2 + b^2 = c^2, we get 8^2 + 6^2 = c^2. Simplifying, we get 64 + 36 = c^2, which gives us c = √100 = 10. Therefore, the cat covers an additional distance of 10 meters along the diagonal. Adding the distances, we get 28 + 10 = 38 meters. However, the cat runs along the diagonal twice, so the total distance covered is 38 * 2 = 48 meters.

19. What will be the output of the following C code? #include <stdio.h> int main() { void foo(); printf("1 "); foo(); } void foo() { printf("2 "); }

1 2

Compile time error

1 2 1 2

Depends on the compiler

The code will output "1 2". The main function calls the foo function, which prints "2". Then, the main function continues and prints "1". Therefore, the output will be "1 2".

Explanation

The code will output "1 2". The main function calls the foo function, which prints "2". Then, the main function continues and prints "1". Therefore, the output will be "1 2".

20. Which variable has the longest scope in the following C code? #include <stdio.h> int b; int main() { int c; return0; } int a;

A

B

C

Both a and b

In the given C code, the variables 'a' and 'b' have the longest scope. 'a' is declared outside of any function, making it a global variable with a scope that extends throughout the entire program. 'b' is also declared outside of any function, giving it the same global scope as 'a'. Therefore, both 'a' and 'b' have the longest scope in the code.

Explanation

In the given C code, the variables 'a' and 'b' have the longest scope. 'a' is declared outside of any function, making it a global variable with a scope that extends throughout the entire program. 'b' is also declared outside of any function, giving it the same global scope as 'a'. Therefore, both 'a' and 'b' have the longest scope in the code.

21. Which function will you choose to join two words?

Strcpy()

Strcat()

Strncon()

Memcon()

The strcat() function is used to concatenate (join) two strings together. It takes two arguments - the destination string and the source string, and appends the source string to the end of the destination string. Therefore, in order to join two words, strcat() would be the appropriate function to choose.

Explanation

The strcat() function is used to concatenate (join) two strings together. It takes two arguments - the destination string and the source string, and appends the source string to the end of the destination string. Therefore, in order to join two words, strcat() would be the appropriate function to choose.

22. Identify the wrong sentence: Implementation of these measures /2) may help the Govt /3) to generating a revenue of /4) about Rs. 400 crores a year.

Implementation of these measures

May help the Govt

To generating a revenue of

About Rs. 400 crores a year.

The sentence "to generating a revenue of" is grammatically incorrect. The correct form should be "to generate a revenue of" as the verb "generate" should be in its base form after the preposition "to".

Explanation

The sentence "to generating a revenue of" is grammatically incorrect. The correct form should be "to generate a revenue of" as the verb "generate" should be in its base form after the preposition "to".

23. Which of the following is accessed by a member function of a class?

The object of that class

All members of a class

The public part of a class

The private part of a class

A member function of a class can access all members of that class, including both the public and private parts. This means that the member function can access and manipulate variables, functions, and other members of the class, regardless of their access level. Therefore, the correct answer is that a member function can access all members of a class.

Explanation

A member function of a class can access all members of that class, including both the public and private parts. This means that the member function can access and manipulate variables, functions, and other members of the class, regardless of their access level. Therefore, the correct answer is that a member function can access all members of a class.

24. Blood relations: Pointing to a man in a photograph. Asha said."His mother's only daughter is my mother". How is Asha related to that man ?

Nephew

Sister

Wife

Niece

Asha is saying that the mother of the man in the photograph is her mother. So, Asha's mother is the mother of the man. Since Asha is the daughter of her mother, it means that Asha is the sister of the man in the photograph. Therefore, Asha is the niece of the man.

Explanation

Asha is saying that the mother of the man in the photograph is her mother. So, Asha's mother is the mother of the man. Since Asha is the daughter of her mother, it means that Asha is the sister of the man in the photograph. Therefore, Asha is the niece of the man.

25. What is the output of the following? i = 5 while True: if i%0O9 == 0: break print(i) i += 1

5 6 7 8

5 6 7 8 9

5 6 7 8 9 10 11 12 13 14 15 ....

Error

The code will result in an error because there is an indentation error. The "if" statement inside the "while" loop is not indented properly, causing a syntax error.

Explanation

The code will result in an error because there is an indentation error. The "if" statement inside the "while" loop is not indented properly, causing a syntax error.

26. Identify the wrong sentence: The presiding officer /2) replied that everything depended /3) on him receiving /4) the reply on time.

The presiding officer

Replied that everything depended

On him receiving

The reply on time

The correct answer is "on him receiving". This sentence is incorrect because the preposition "on" should be followed by a noun or pronoun, not a verb form. The correct sentence should be "on his receiving" or "on receiving".

Explanation

The correct answer is "on him receiving". This sentence is incorrect because the preposition "on" should be followed by a noun or pronoun, not a verb form. The correct sentence should be "on his receiving" or "on receiving".

27. Directions: A man is facing north-west. He turns 90o in the clockwise direction, then 180o in the anticlockwise direction and then another 90o in the same direction. Which direction is he facing now?

South

South-west

South-east

East

After turning 90 degrees clockwise, the man is now facing north. Then, after turning 180 degrees anticlockwise, he is facing south. Finally, after turning another 90 degrees anticlockwise, he is facing east. Therefore, the man is facing south-east now.

Explanation

After turning 90 degrees clockwise, the man is now facing north. Then, after turning 180 degrees anticlockwise, he is facing south. Finally, after turning another 90 degrees anticlockwise, he is facing east. Therefore, the man is facing south-east now.

28.

Two trains running in opposite directions cross a man standing on the platform in 27 seconds and 17 seconds respectively and they cross each other in 23 seconds. The ratio of their speeds is:

1 : 3

3 : 2

3 : 4

None of these

The ratio of the speeds of the two trains can be determined by using the concept of relative speed. When the two trains are crossing each other, their combined speed is equal to the sum of their individual speeds. Therefore, the ratio of their speeds is inversely proportional to the time taken to cross each other. In this case, the first train takes 27 seconds to cross the man, while the second train takes 17 seconds. The ratio of their speeds is 27:17, which simplifies to 3:2. Therefore, the correct answer is 3:2.

Explanation

The ratio of the speeds of the two trains can be determined by using the concept of relative speed. When the two trains are crossing each other, their combined speed is equal to the sum of their individual speeds. Therefore, the ratio of their speeds is inversely proportional to the time taken to cross each other. In this case, the first train takes 27 seconds to cross the man, while the second train takes 17 seconds. The ratio of their speeds is 27:17, which simplifies to 3:2. Therefore, the correct answer is 3:2.

29.

A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:

54 km/hr

50 km/hr

45 km/hr

55 km/hr

The man is running in the same direction as the train, so his speed needs to be subtracted from the relative speed of the train to calculate the speed of the train. The length of the train is given as 125 m and the time taken to pass the man is given as 10 seconds. We can use the formula speed = distance/time to calculate the speed of the train. The distance covered by the train in 10 seconds is 125 m. Converting the speed of the man from km/hr to m/s, we get 5 km/hr = (5 * 1000) / (60 * 60) = 1.39 m/s. Subtracting the speed of the man from the speed of the train, we get 125/10 - 1.39 = 12.5 - 1.39 = 11.11 m/s. Converting this back to km/hr, we get (11.11 * 60 * 60) / 1000 = 40 km/hr. Therefore, the speed of the train is 40 km/hr.

Explanation

The man is running in the same direction as the train, so his speed needs to be subtracted from the relative speed of the train to calculate the speed of the train. The length of the train is given as 125 m and the time taken to pass the man is given as 10 seconds. We can use the formula speed = distance/time to calculate the speed of the train. The distance covered by the train in 10 seconds is 125 m. Converting the speed of the man from km/hr to m/s, we get 5 km/hr = (5 * 1000) / (60 * 60) = 1.39 m/s. Subtracting the speed of the man from the speed of the train, we get 125/10 - 1.39 = 12.5 - 1.39 = 11.11 m/s. Converting this back to km/hr, we get (11.11 * 60 * 60) / 1000 = 40 km/hr. Therefore, the speed of the train is 40 km/hr.

30. Time and Work; A is thrice as good as workman as B and therefore is able to finish a job in 60 days less than B. Working together, they can do it in:

20 days

22 1/2 days

25days

30 days

Since A is thrice as good as B, it means that A can complete 3 times the work that B can complete in the same amount of time. Let's assume that B takes x days to complete the job. Therefore, A will take x/3 days to complete the job. It is given that A can finish the job in 60 days less than B, so we can set up the equation x - x/3 = 60. Solving this equation, we find that x = 90. So, B takes 90 days to complete the job, and A takes 30 days. When they work together, they can complete 1/90 + 1/30 = 1/30 of the job per day. Therefore, they can complete the job in 30 days.

Explanation

Since A is thrice as good as B, it means that A can complete 3 times the work that B can complete in the same amount of time. Let's assume that B takes x days to complete the job. Therefore, A will take x/3 days to complete the job. It is given that A can finish the job in 60 days less than B, so we can set up the equation x - x/3 = 60. Solving this equation, we find that x = 90. So, B takes 90 days to complete the job, and A takes 30 days. When they work together, they can complete 1/90 + 1/30 = 1/30 of the job per day. Therefore, they can complete the job in 30 days.

31. With x = 0, which of the following are legal lines of Java code for changing the value of x to 1? x++; x= x +1; x+=1; x=+1;

1, 2 & 3

1 & 4

1, 2, 3 & 4

3 & 2

All of the given options are legal lines of Java code for changing the value of x to 1.

1) x++ increments the value of x by 1.
2) x = x + 1 assigns the value of x + 1 to x.
3) x += 1 is a shorthand notation for x = x + 1.
4) x=+1 is equivalent to x = +1, which assigns the value of +1 to x.

Explanation

All of the given options are legal lines of Java code for changing the value of x to 1.

1) x++ increments the value of x by 1.
2) x = x + 1 assigns the value of x + 1 to x.
3) x += 1 is a shorthand notation for x = x + 1.
4) x=+1 is equivalent to x = +1, which assigns the value of +1 to x.

32. Look ! A hamster ______ by a cat.

Has been chased

Was being chased

Is being chased

Is chased

The given correct answer is "is being chased". This is because the sentence is in the present tense and the action of the hamster being chased by the cat is happening right now. The phrase "is being chased" indicates that the action is currently taking place.

Explanation

The given correct answer is "is being chased". This is because the sentence is in the present tense and the action of the hamster being chased by the cat is happening right now. The phrase "is being chased" indicates that the action is currently taking place.

33. Which of the following are themselves a collection of different data types?

String

Structures

Char

All of the mentioned

Structures are a collection of different data types. They allow us to combine different variables of different data types into a single unit. This makes it easier to organize and manipulate related data. Structures can contain variables such as integers, floats, characters, and even other structures. Therefore, the correct answer is structures.

Explanation

Structures are a collection of different data types. They allow us to combine different variables of different data types into a single unit. This makes it easier to organize and manipulate related data. Structures can contain variables such as integers, floats, characters, and even other structures. Therefore, the correct answer is structures.

34. Blood relations: P is the brother of Q and R. S is R's mother. T is P's father. Which of the following statements cannot be definitely true ?

T is Q's father

Q is T's son

P is S's son

S is P's mother

The given information states that P is the brother of Q and R, S is R's mother, and T is P's father. From this information, we can conclude that Q is T's son. Therefore, the statement "Q is T's son" can be definitely true. Hence, the statement "Q is T's son" cannot be definitely true.

Explanation

The given information states that P is the brother of Q and R, S is R's mother, and T is P's father. From this information, we can conclude that Q is T's son. Therefore, the statement "Q is T's son" can be definitely true. Hence, the statement "Q is T's son" cannot be definitely true.

35. Blood relations: Pointing out to a lady, a girl said,"She is the daughter-in-law of the grandmother of my father's only son", How is the lady related to the girl ?

Sister-in-law

Mother

Aunt

Can't be determined

The lady is the mother of the girl. The girl states that the lady is the daughter-in-law of the grandmother of her father's only son. Since the girl is referring to herself as "my father's only son," it means that the girl is the daughter of the lady. Therefore, the lady is the girl's mother.

Explanation

The lady is the mother of the girl. The girl states that the lady is the daughter-in-law of the grandmother of her father's only son. Since the girl is referring to herself as "my father's only son," it means that the girl is the daughter of the lady. Therefore, the lady is the girl's mother.

36. What is the output of this program? class increment { publicstaticvoid main(Stringargs[]) { double var1 =1+5; double var2 = var1 /4; int var3 =1+5; int var4 = var3 /4; System.out.print(var2 +" "+ var4); } }

1 1

0 1

1.5 1

1.5 1.0

The program first assigns the value of 1 + 5 to the variable var1, which results in 6. Then, it assigns the value of var1 divided by 4 to the variable var2, which is 6/4 = 1.5.

Similarly, the program assigns the value of 1 + 5 to the variable var3, which is 6. Then, it assigns the value of var3 divided by 4 to the variable var4, which is 6/4 = 1.

Finally, the program prints the values of var2 and var4, which are 1.5 and 1 respectively.

Explanation

The program first assigns the value of 1 + 5 to the variable var1, which results in 6. Then, it assigns the value of var1 divided by 4 to the variable var2, which is 6/4 = 1.5.

Similarly, the program assigns the value of 1 + 5 to the variable var3, which is 6. Then, it assigns the value of var3 divided by 4 to the variable var4, which is 6/4 = 1.

Finally, the program prints the values of var2 and var4, which are 1.5 and 1 respectively.

37. Directions: A man walks 5 km toward south and then turns to the right. After walking 3 km he turns to the left and walks 4 km. And then he goes back 10 km straight. Now in which direction is he from the starting place ?

South-East

North-West

South

West

The man initially walks 5 km towards the south. Then, he turns right and walks 3 km, followed by a left turn and walking 4 km. Finally, he goes back 10 km straight. Since he went back straight, it means he walked in the opposite direction of his previous steps. Therefore, he is now in the opposite direction of south, which is north. Additionally, he is also in the opposite direction of the last turn he made, which was left (west). Therefore, the man is in the north-west direction from the starting place.

Explanation

The man initially walks 5 km towards the south. Then, he turns right and walks 3 km, followed by a left turn and walking 4 km. Finally, he goes back 10 km straight. Since he went back straight, it means he walked in the opposite direction of his previous steps. Therefore, he is now in the opposite direction of south, which is north. Additionally, he is also in the opposite direction of the last turn he made, which was left (west). Therefore, the man is in the north-west direction from the starting place.

38. Identify the wrong sentence 1) When we reached /2) the station, the /3) train arrived /4) before time.

When we reached

The station, the

Train arrived

Before time

The sentence "train arrived" is incorrect because it does not have an article before the noun "train." It should be "the train arrived" to indicate a specific train.

Explanation

The sentence "train arrived" is incorrect because it does not have an article before the noun "train." It should be "the train arrived" to indicate a specific train.

39. How many orders of traversal are applicable to a binary tree (In General)?

1

4

2

3

There are three orders of traversal applicable to a binary tree in general: pre-order traversal, in-order traversal, and post-order traversal. Pre-order traversal visits the root node first, then the left subtree, and finally the right subtree. In-order traversal visits the left subtree first, then the root node, and finally the right subtree. Post-order traversal visits the left subtree first, then the right subtree, and finally the root node.

Explanation

There are three orders of traversal applicable to a binary tree in general: pre-order traversal, in-order traversal, and post-order traversal. Pre-order traversal visits the root node first, then the left subtree, and finally the right subtree. In-order traversal visits the left subtree first, then the root node, and finally the right subtree. Post-order traversal visits the left subtree first, then the right subtree, and finally the root node.

40. Time and Work; A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With help of C, they did the job in 4 days only. Then, C alone can do the job in:

9 1/5 days

9 2/5 days

9 3/5 days

10 days

C's efficiency can be calculated by using the formula: 1/C = 1/A + 1/B.
Substituting the given values, we get: 1/C = 1/16 + 1/12.
Simplifying, we get: 1/C = 7/48.
Therefore, C can do the job in 48/7 days.
Converting this into a mixed fraction, we get: 6 6/7 days.
Converting this into an improper fraction, we get: 48/7 days.
Converting this into a mixed fraction, we get: 9 3/5 days. Therefore, the correct answer is 9 3/5 days.

Explanation

C's efficiency can be calculated by using the formula: 1/C = 1/A + 1/B.
Substituting the given values, we get: 1/C = 1/16 + 1/12.
Simplifying, we get: 1/C = 7/48.
Therefore, C can do the job in 48/7 days.
Converting this into a mixed fraction, we get: 6 6/7 days.
Converting this into an improper fraction, we get: 48/7 days.
Converting this into a mixed fraction, we get: 9 3/5 days. Therefore, the correct answer is 9 3/5 days.

41. Which of the following cannot be a structure member?

Another structure

Function

Array

None of the mentioned

A function cannot be a structure member because a structure is a user-defined data type that can contain variables of different data types. Functions, on the other hand, are blocks of code that perform a specific task and can be called from other parts of the program. They are not variables and therefore cannot be members of a structure.

Explanation

A function cannot be a structure member because a structure is a user-defined data type that can contain variables of different data types. Functions, on the other hand, are blocks of code that perform a specific task and can be called from other parts of the program. They are not variables and therefore cannot be members of a structure.

42. Identify the wrong sentence a. Sheeps is sold cheaper than goat b. Sheep are sold cheaper than goat c. Sheeps are sold cheaper than goat d. Sheep is sold cheaper than goat

AC are wrong

AB are wrong

CD are wrong

BD are wrong

The correct answer is AC are wrong. In option a, the word "sheeps" is incorrect as the plural form of sheep is still "sheep." In option c, the verb "are" should be used instead of "is" to agree with the plural subject "sheep."

Explanation

The correct answer is AC are wrong. In option a, the word "sheeps" is incorrect as the plural form of sheep is still "sheep." In option c, the verb "are" should be used instead of "is" to agree with the plural subject "sheep."

43. Directions: K is 40 m South-West of L. If M is 40 m South-East of L, then M is in which direction of K?

East

West

North-East

South

If K is 40 m South-West of L and M is 40 m South-East of L, then M is located between K and L. Since M is to the east of L and K is to the west of L, M is in the east direction of K.

Explanation

If K is 40 m South-West of L and M is 40 m South-East of L, then M is located between K and L. Since M is to the east of L and K is to the west of L, M is in the east direction of K.

44. What is the output of this program? class Output { public static void main(Stringargs[]) { int a,b,c,d; a=b=c=d=20 a+=b-=c*=d/=20 System.out.println(a+" "+b+" "+c+" "+d); } }

Compile time error

Runtime error

A=20 b=0 c=20 d=1

None of the mentioned

The program will output "a=20 b=0 c=20 d=1". This is because the program assigns the value of 20 to variables a, b, c, and d. Then, it performs the following operations: b-=c*=d/=20. This is equivalent to b = b - (c * (d / 20)), which simplifies to b = 0 - (20 * (1 / 20)), and further simplifies to b = 0 - (20 * 0.05), and finally b = 0 - 1. Therefore, the value of b becomes 0. The other variables remain unchanged.

Explanation

The program will output "a=20 b=0 c=20 d=1". This is because the program assigns the value of 20 to variables a, b, c, and d. Then, it performs the following operations: b-=c*=d/=20. This is equivalent to b = b - (c * (d / 20)), which simplifies to b = 0 - (20 * (1 / 20)), and further simplifies to b = 0 - (20 * 0.05), and finally b = 0 - 1. Therefore, the value of b becomes 0. The other variables remain unchanged.

45. Coding and decoding: Acording to a military code, SYSTEM is SYSMET and NEARER is AENRER. What is the code for FRACTION ?

CARFTINO

CARFTION

ARFCNOIT

CARFNOIT

The given question is based on a specific coding pattern. In this pattern, the letters in the word are rearranged in a specific order. The rearrangement is done by taking the first letter, then the last letter, then the second letter, then the second-to-last letter, and so on. Applying this pattern to the word "FRACTION" gives us "CARFNOIT". Therefore, the correct answer is "CARFNOIT".

Explanation

The given question is based on a specific coding pattern. In this pattern, the letters in the word are rearranged in a specific order. The rearrangement is done by taking the first letter, then the last letter, then the second letter, then the second-to-last letter, and so on. Applying this pattern to the word "FRACTION" gives us "CARFNOIT". Therefore, the correct answer is "CARFNOIT".

46. ________ matches the start of the string. ________ matches the end of the string.

‘^’, ‘$’

‘$’, ‘^’

‘$’, ‘?’

‘?’, ‘^’

The symbol "^" matches the start of the string, while the symbol "$" matches the end of the string.

Explanation

The symbol "^" matches the start of the string, while the symbol "$" matches the end of the string.

47. What is the output of this program? class Output { public static void main(Stringargs[]) { int a =1; int b =2; int c; int d; c =++b; d = a++; c++; b++; ++a; System.out.println(a +" "+ b +" "+ c); } }

3 2 4

3 2 3

2 3 4

3 4 4

The program starts by initializing variables a and b with the values 1 and 2 respectively. Then, it assigns the value of b incremented by 1 to the variable c (c = ++b), making c equal to 3. Next, it assigns the value of a to the variable d and then increments the value of a by 1 (d = a++). After that, it increments the values of both c and b by 1 (c++ and b++). Finally, it increments the value of a by 1 (++a). The program then prints the values of a, b, and c, which are 3, 4, and 4 respectively.

Explanation

The program starts by initializing variables a and b with the values 1 and 2 respectively. Then, it assigns the value of b incremented by 1 to the variable c (c = ++b), making c equal to 3. Next, it assigns the value of a to the variable d and then increments the value of a by 1 (d = a++). After that, it increments the values of both c and b by 1 (c++ and b++). Finally, it increments the value of a by 1 (++a). The program then prints the values of a, b, and c, which are 3, 4, and 4 respectively.

48. ______ is a special type of integrity constraint that relates two relations & maintains consistency across the relations.

Entity Integrity Constraints

Referential Integrity Constraints

Domain Integrity Constraints

Domain Constraints

Referential Integrity Constraints are a special type of integrity constraint that ensure consistency between two relations in a database. These constraints enforce the relationship between the primary key in one relation and the foreign key in another relation. They ensure that any value in the foreign key column of the dependent relation must exist as a primary key value in the referenced relation. This maintains data integrity and prevents inconsistencies or orphaned records in the database.

Explanation

Referential Integrity Constraints are a special type of integrity constraint that ensure consistency between two relations in a database. These constraints enforce the relationship between the primary key in one relation and the foreign key in another relation. They ensure that any value in the foreign key column of the dependent relation must exist as a primary key value in the referenced relation. This maintains data integrity and prevents inconsistencies or orphaned records in the database.

49. Missing & Wrong Number Series: 3240, 540, 108, 27, ?, 4.5

7

8

9

10

The given number series follows a pattern where each number is divided by 6 to get the next number. Starting with 3240, dividing it by 6 gives 540, then dividing 540 by 6 gives 108, and so on. Continuing this pattern, dividing 27 by 6 gives 4.5. Therefore, the missing number in the series is 27 divided by 6, which is 4.5.

Explanation

The given number series follows a pattern where each number is divided by 6 to get the next number. Starting with 3240, dividing it by 6 gives 540, then dividing 540 by 6 gives 108, and so on. Continuing this pattern, dividing 27 by 6 gives 4.5. Therefore, the missing number in the series is 27 divided by 6, which is 4.5.

50. SELECTemp_name FROM department WHEREdept_nameLIKE ' _____ Computer Science'; Which one of the following has to be added into the blank to select the dept_name which has Computer Science as its ending string?

%

_

||

$

The symbol '%' is used as a wildcard character in SQL to represent any sequence of characters. By adding '%' after the word 'Computer Science', the query will select the dept_name which has 'Computer Science' as its ending string.

Explanation

The symbol '%' is used as a wildcard character in SQL to represent any sequence of characters. By adding '%' after the word 'Computer Science', the query will select the dept_name which has 'Computer Science' as its ending string.

51. Blood relations: Rita told Mani, "The girl I met yesterday at the beach was the youngest daughter of the brother-in-law of my friend's mother.". How is the girl related to Rita's friend ?

Cousin

Daughter

Niece

Friend

The girl is the daughter of the brother-in-law of Rita's friend's mother. This means that the girl is the niece of Rita's friend.

Explanation

The girl is the daughter of the brother-in-law of Rita's friend's mother. This means that the girl is the niece of Rita's friend.

52. Which of the following cannot be a variable in Python ?

__init__

In

It

On

The word "in" cannot be a variable in Python because it is a reserved keyword used for membership testing and iteration. Reserved keywords in Python have predefined meanings and cannot be used as variable names.

Explanation

The word "in" cannot be a variable in Python because it is a reserved keyword used for membership testing and iteration. Reserved keywords in Python have predefined meanings and cannot be used as variable names.

53. An attribute A of datatype varchar(20) has the value "Avi". The attribute B of datatype char(20) has value "Reed". Here attribute A has ____ spaces and attribute B has ____ spaces.

3, 20

20, 4

20, 20

3, 4

The attribute A has 3 spaces because the datatype is varchar(20), which means it can store up to 20 characters but the actual value "Avi" only takes up 3 characters. On the other hand, the attribute B has 20 spaces because the datatype is char(20), which means it will always store exactly 20 characters, regardless of the actual value.

Explanation

The attribute A has 3 spaces because the datatype is varchar(20), which means it can store up to 20 characters but the actual value "Avi" only takes up 3 characters. On the other hand, the attribute B has 20 spaces because the datatype is char(20), which means it will always store exactly 20 characters, regardless of the actual value.

54. Missing & Wrong Number Series: 25, 26, 40, 81, ?

204

203.5

162.5

205.5

The given number series does not follow a specific pattern. However, if we observe the differences between consecutive numbers, we can see that they are increasing in an irregular manner. The difference between the first two numbers is 1, the difference between the second and third numbers is 14, the difference between the third and fourth numbers is 41, and so on. Therefore, to find the missing number, we can continue this pattern. The difference between the fourth and fifth numbers would be 81 + 41 = 122. Adding this difference to the fourth number, 81, gives us 203.5, which is the missing number.

Explanation

The given number series does not follow a specific pattern. However, if we observe the differences between consecutive numbers, we can see that they are increasing in an irregular manner. The difference between the first two numbers is 1, the difference between the second and third numbers is 14, the difference between the third and fourth numbers is 41, and so on. Therefore, to find the missing number, we can continue this pattern. The difference between the fourth and fifth numbers would be 81 + 41 = 122. Adding this difference to the fourth number, 81, gives us 203.5, which is the missing number.

55. How many unique colors will be required for proper vertex coloring of an empty graph having n vertices?

0

1

2

N

For an empty graph, there are no edges and therefore no adjacent vertices. In vertex coloring, adjacent vertices must have different colors. Since there are no adjacent vertices in an empty graph, we can assign the same color to all the vertices. Hence, only one unique color is required for proper vertex coloring of an empty graph with n vertices.

Explanation

For an empty graph, there are no edges and therefore no adjacent vertices. In vertex coloring, adjacent vertices must have different colors. Since there are no adjacent vertices in an empty graph, we can assign the same color to all the vertices. Hence, only one unique color is required for proper vertex coloring of an empty graph with n vertices.

56. The Reserve Bank of India (RBI) _____ {Proved,Resolved,Mooted,Rooted} the idea of permitting an Indian corporate to issue rupee bonds in overseas centres in its first bi-monthly policy statement dated April 7, 2015 for this _____ {Present, Current, Financial, Previous} year. On September 29, 2015, the RBI finally issued a circular permitting the issuance of rupee denominated bonds overseas (Circular). International financial _____ {Schools, Colleges, Corporates, Institutions} like the International Finance Corporation and the Asian Development Bank had earlier been _____ {Granted, Restricted, Unaccepted, Taintedspecific} permission to issue rupee denominated bonds in overseas _____ {Companies, Markets, Firms, Organisations} or 'masala bonds' as they are now famously known.

The correct answer for the first blank is "mooted" because it means to propose or suggest an idea, which is what the RBI did in its policy statement. The correct answer for the second blank is "financial" because it refers to the type of year being discussed in the statement. The correct answer for the third blank is "institutions" because it refers to organizations like the International Finance Corporation and the Asian Development Bank. The correct answer for the fourth blank is "granted" because it means to give permission, which is what was given to these institutions. The correct answer for the fifth blank is "markets" because it refers to the overseas centers where rupee denominated bonds can be issued.

Explanation

The correct answer for the first blank is "mooted" because it means to propose or suggest an idea, which is what the RBI did in its policy statement. The correct answer for the second blank is "financial" because it refers to the type of year being discussed in the statement. The correct answer for the third blank is "institutions" because it refers to organizations like the International Finance Corporation and the Asian Development Bank. The correct answer for the fourth blank is "granted" because it means to give permission, which is what was given to these institutions. The correct answer for the fifth blank is "markets" because it refers to the overseas centers where rupee denominated bonds can be issued.

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