Toyota Hackathon: Code For Safer India
This test consist of:
- 10 Aptitude Question
- 10 Programming Question
- 10 General Science
Duration: 50 MINUTES
NOTE: USE OF ANY UNFAIR MEANS WILL RESULT IN DIRECT DISQUALIFICATION OF THE TEAM
A reminder call will be given to each school regarding the time left in the completion of test.
Questions and Answers
- 1.
From a point P on a level ground, the angle of elevation of the top tower is 30º. If the tower is 100 m high, the distance of point P from the foot of the tower is:
- A.
149 m
- B.
156 m
- C.
173 m
- D.
200 m
Correct Answer
C. 173 mExplanation
The angle of elevation is the angle between the horizontal line and the line of sight from the observer to the top of the tower. In this case, the angle of elevation is 30° and the height of the tower is 100 m. To find the distance from point P to the foot of the tower, we can use the tangent function. The tangent of 30° is equal to the opposite side (height of the tower) divided by the adjacent side (distance from point P to the foot of the tower). Rearranging the equation, we can solve for the adjacent side, which gives us a distance of approximately 173 m. Therefore, the correct answer is 173 m.Rate this question:
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- 2.
A vendor bought toffees at 6 for a rupee. How many for a rupee must he sell to gain 20%?
- A.
3
- B.
4
- C.
5
- D.
6
Correct Answer
C. 5Explanation
To find out how many toffees the vendor must sell to gain 20%, we need to calculate the selling price of one toffee. Since the vendor bought 6 toffees for a rupee, the cost price of one toffee is 1/6 rupee. To calculate the selling price, we add 20% of the cost price to the cost price. 20% of 1/6 rupee is 1/30 rupee. Adding this to the cost price, we get 1/6 + 1/30 = 5/30 + 1/30 = 6/30 = 1/5 rupee. Therefore, the vendor must sell 5 toffees for a rupee to gain 20%.Rate this question:
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- 3.
When a plot is sold for Rs. 18,700, the owner loses 15%. At what price must that plot be sold in order to gain 15%?
- A.
Rs. 21,000
- B.
Rs. 22,500
- C.
Rs. 25,300
- D.
Rs. 25,800
Correct Answer
C. Rs. 25,300Explanation
The owner initially sold the plot for Rs. 18,700 and incurred a loss of 15%. To find the selling price that would result in a gain of 15%, we need to calculate the original cost price of the plot.
Let's assume the original cost price of the plot is x.
According to the given information, the selling price is 85% of the cost price (100% - 15% loss).
So, 85% of x is equal to Rs. 18,700.
0.85x = 18,700
Dividing both sides by 0.85, we get:
x = 18,700 / 0.85 = Rs. 22,000
To calculate the selling price that would result in a gain of 15%, we need to find 115% of the cost price.
115% of Rs. 22,000 is equal to:
(115/100) * 22,000 = Rs. 25,300
Therefore, the plot must be sold for Rs. 25,300 in order to gain 15%.Rate this question:
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- 4.
It was Sunday on Jan 1, 2006. What was the day of the week Jan 1, 2010?
- A.
Sunday
- B.
Saturday
- C.
Friday
- D.
Wednesday
Correct Answer
C. FridayExplanation
From Jan 1, 2006 to Jan 1, 2010, there are 4 years. Each year has 365 days, except for leap years which have 366 days. In this case, 2008 is a leap year. So, the total number of days is 365 + 365 + 366 + 365 = 1461 days. Since 1461 is divisible by 7, the day of the week will remain the same after 1461 days. Therefore, Jan 1, 2010 will also be a Sunday.Rate this question:
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- 5.
What will be the day of the week 15th August 2010?
- A.
Sunday
- B.
Monday
- C.
Tuesday
- D.
Friday
Correct Answer
A. SundayExplanation
15th August 2010 was a Sunday because it was the Indian Independence Day, which is always celebrated on the 15th of August. This means that in 2010, the 15th of August fell on a Sunday.Rate this question:
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- 6.
In the first 10 overs of a cricket game, the run rate was only 3.2. What should be the run rate in the remaining 40 overs to reach the target of 282 runs?
- A.
6.25
- B.
6.5
- C.
6.75
- D.
7
Correct Answer
A. 6.25Explanation
To find the required run rate in the remaining 40 overs, we need to calculate the total runs required in those overs. The total runs required to reach the target of 282 runs is 282 - (3.2 x 10) = 282 - 32 = 250 runs. To calculate the run rate, we divide the total runs required by the number of overs remaining, which is 250 / 40 = 6.25. Therefore, the required run rate in the remaining 40 overs is 6.25.Rate this question:
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- 7.
The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?
- A.
19
- B.
1
- C.
10
- D.
0
Correct Answer
A. 19Explanation
The average of 20 numbers is zero, which means that the sum of all the numbers is also zero. In order for the sum to be zero, some numbers must be negative and some must be positive. However, since we are looking for the maximum number of numbers that can be greater than zero, we can assume that all the other numbers are negative. Therefore, the maximum number of numbers that can be greater than zero is 19.Rate this question:
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- 8.
A pupil's marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by half (1/2). The number of pupils in the class is:
- A.
40
- B.
14
- C.
20
- D.
30
Correct Answer
A. 40Explanation
If the pupil's marks were wrongly entered as 83 instead of 63, it means that the pupil's marks were higher than they should have been. This would result in the average marks for the class being higher than they should have been as well. The increase in average marks by half indicates that the pupil's marks were half of the average marks for the class. Since the pupil's marks were entered as 83 instead of 63, it means that the average marks for the class should have been 166 instead of 126. To find the number of pupils in the class, we can divide the total marks (166) by the average marks per pupil (4). Therefore, the number of pupils in the class is 40.Rate this question:
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- 9.
The sum of 5 children born at the intervals of 3 years each is 50 years. What is the age of youngest child?
- A.
10 year
- B.
2 years
- C.
3 years
- D.
4 years
Correct Answer
D. 4 yearsExplanation
The sum of the ages of the 5 children can be calculated by multiplying the number of children (5) by the interval between their births (3) and adding the result to the age of the youngest child. So, if the sum is 50 years, the age of the youngest child would be 50 - (5 * 3) = 35 years. However, since the given options are all less than 35, it can be concluded that the age of the youngest child is 4 years.Rate this question:
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- 10.
A boat having a length 3 m and breadth 2 m is floating on a lake. The boat sinks by 1 cm when a man gets on it. The mass of the man is:
- A.
12 kg
- B.
60 kg
- C.
72 kg
- D.
96 kg
Correct Answer
B. 60 kgExplanation
When the man gets on the boat, it sinks by 1 cm. This sinking is caused by the displacement of water due to the added weight of the man. Since the boat sinks by 1 cm, it means that the weight of the man is equal to the weight of water that is displaced by the boat sinking. The weight of the water displaced is equal to the volume of water displaced multiplied by the density of water. The volume of water displaced is equal to the length multiplied by the breadth multiplied by the height of sinking (1 cm). Therefore, the weight of the man is equal to the volume of water displaced (3 m x 2 m x 0.01 m) multiplied by the density of water (1000 kg/m^3), which gives us 60 kg.Rate this question:
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- 11.
The product of two numbers is 4107. If the H.F. of these numbers is 37, then the greater number is:
- A.
101
- B.
107
- C.
111
- D.
150
Correct Answer
C. 111Explanation
The product of two numbers is 4107 and their highest common factor (H.F.) is 37. This means that both numbers are multiples of 37. To find the greater number, we need to divide 4107 by 37, which gives us 111. Therefore, the greater number is 111.Rate this question:
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- 12.
The information source for making proteins is______
- A.
DNA
- B.
Hormones
- C.
Rough Endoplasmic Reticulum
- D.
Enzymes
Correct Answer
A. DNAExplanation
DNA is the correct answer because it contains the genetic instructions for the synthesis of proteins. DNA is transcribed into mRNA, which is then translated into proteins by the ribosomes. Proteins are essential for the structure, function, and regulation of cells and organisms. Hormones, rough endoplasmic reticulum, and enzymes are not directly involved in providing the information source for making proteins.Rate this question:
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- 13.
Bauxite is an ore of which metal?
- A.
Iron
- B.
Alluminium
- C.
Copper
- D.
Tin
Correct Answer
B. AlluminiumExplanation
Bauxite is an ore of aluminum. It is the main source of aluminum and is formed through the weathering and leaching of aluminum-rich rocks. Bauxite is primarily composed of aluminum hydroxide minerals, along with various impurities. The extraction of aluminum from bauxite involves a process called the Bayer process, where the ore is chemically treated to obtain pure aluminum oxide, which is then electrolyzed to produce aluminum metal. Aluminum is widely used in various industries due to its lightweight, corrosion resistance, and conductivity properties. Therefore, bauxite being an ore of aluminum is the correct answer.Rate this question:
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- 14.
The gap between two neurons is called________
- A.
Synaptic Gap
- B.
Auxin
- C.
Ethylene
- D.
Giberrellin
Correct Answer
A. Synaptic GapExplanation
The gap between two neurons is called the synaptic gap. This is the small space between the axon terminal of one neuron and the dendrite of another neuron. It is where neurotransmitters are released from the axon terminal and received by the dendrite, allowing for the transmission of signals between neurons.Rate this question:
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- 15.
An electric fuse is based on
- A.
Heating effect of the current
- B.
Cooling effect of the current
- C.
Chemical effect of the current
- D.
Magnetic effect of the current
Correct Answer
A. Heating effect of the currentExplanation
An electric fuse is based on the heating effect of the current. When excessive current flows through a fuse, it causes the fuse wire to heat up and melt, thus breaking the circuit and protecting the electrical equipment from damage. This is achieved by using a fuse wire with a low melting point, allowing it to easily melt and break the circuit when the current exceeds a certain limit.Rate this question:
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- 16.
Which In the preparation of soap, sodium chloride causes: do you like?
- A.
Complete Saponification
- B.
Complete precipitation
- C.
Complete neutralization
- D.
Complete hydrolisis
Correct Answer
B. Complete precipitationExplanation
Sodium chloride in the preparation of soap causes complete precipitation. This means that when sodium chloride is added to the soap mixture, it causes all the impurities and unwanted substances to form a solid precipitate, which can then be easily separated from the soap solution. This helps in purifying the soap and removing any impurities that may affect its quality or effectiveness.Rate this question:
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- 17.
The respiratory rhythm centre is present in the:
- A.
Medula Oblongota
- B.
Cerebrum
- C.
Cerebellum
- D.
None of the above
Correct Answer
A. Medula OblongotaExplanation
The respiratory rhythm center is responsible for controlling the breathing rate. It is located in the medulla oblongata, which is a part of the brainstem. The medulla oblongata plays a crucial role in regulating various involuntary functions of the body, including respiration. It receives sensory input from chemoreceptors and stretch receptors, and based on this information, it sends signals to the muscles involved in breathing, coordinating the inhalation and exhalation process. The medulla oblongata also receives input from the higher brain centers to adjust the breathing rate in response to different situations, such as exercise or stress.Rate this question:
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- 18.
Which animal sweat is red in color?
- A.
Hippopotamus
- B.
Rat
- C.
Kangaroo
- D.
Kangaroo Rat
Correct Answer
A. HippopotamusExplanation
Hippopotamus sweat is red in color due to a unique combination of oils and pigments secreted by their sweat glands. These pigments, called "hipposudoric acid" and "norhipposudoric acid," have antibacterial properties and act as a sunscreen for the hippos' sensitive skin. When the acids come into contact with oxygen, they turn red, giving the sweat a reddish color. This adaptation helps protect the hippos from sunburn and infections, making their sweat a distinctive shade of red.Rate this question:
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- 19.
Which is the longest cell in the human body?
- A.
Neuron
- B.
Membrane
- C.
Oblongota
- D.
Cerebellum
Correct Answer
A. NeuronExplanation
A neuron is the longest cell in the human body. Neurons are specialized cells that transmit information throughout the body. They have a long, slender structure called an axon that can extend over long distances, allowing for communication between different parts of the body. Neurons are found in the brain, spinal cord, and peripheral nerves, and their length can vary from a few millimeters to several feet. They play a crucial role in the functioning of the nervous system and are responsible for transmitting electrical signals and coordinating various bodily functions.Rate this question:
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- 20.
A voltmeter is used to measure
- A.
Potential difference
- B.
Electric current
- C.
Electric power
- D.
Both (a) and (b)
Correct Answer
A. Potential differenceExplanation
A voltmeter is used to measure potential difference, which is the difference in electric potential between two points in an electric circuit. It is not used to measure electric current or electric power. Both options (a) and (b) are incorrect.Rate this question:
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- 21.
Which element is liquid at room temperature?
- A.
Mercury
- B.
Helium
- C.
Copper
- D.
Both (a) and (c)
Correct Answer
A. MercuryExplanation
Mercury is the correct answer because it is the only element listed that is a liquid at room temperature. Helium is a gas at room temperature, while Copper is a solid at room temperature. Therefore, the correct answer is Mercury.Rate this question:
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- 22.
1. In C# variables are categorized into ………. i) Value Type ii) Reference Type iii) Initial Type iv) Pointer Types
- A.
I, ii, iii only
- B.
Ii, iii, iv only
- C.
I, ii and iv only
- D.
All i, ii, iii and iv
Correct Answer
C. I, ii and iv onlyExplanation
In C#, variables are categorized into value types, reference types, and pointer types. Value types store the actual value of the variable, while reference types store a reference to the location of the value. Pointer types store the memory address of the variable. Therefore, the correct answer is i, ii, and iv only, as initial types are not a category of variables in C#.Rate this question:
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- 23.
Value type variables can be assigned a value directly which are derived from the class
- A.
System Value
- B.
System Value Type
- C.
General Value type
- D.
Variable Value Type
Correct Answer
B. System Value TypeExplanation
System Value Type is the correct answer because value type variables in C# can be assigned a value directly, which are derived from the System.ValueType class. This class is the base class for all value types in C#. Therefore, System Value Type is the appropriate option that accurately describes value type variables derived from the class.Rate this question:
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- 24.
The various data types used in C# are i) Integral Type ii) Floating point types iii) Boolean types iv) Nullable types
- A.
I, ii and iii
- B.
Ii, iii and iv
- C.
I, iii, iv
- D.
All i, ii, iii, iv
Correct Answer
D. All i, ii, iii, ivExplanation
The correct answer is "All i, ii, iii, iv". This is because all four options are listed as data types used in C#. The first option includes integral types, the second option includes floating point types, the third option includes boolean types, and the fourth option includes nullable types. Therefore, the correct answer is that all of these data types are used in C#.Rate this question:
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- 25.
4. The built-in operators that are provided by C# programming language are… i) Arithmetic operators ii) Logical operators iii) Bitwise operators iv) Assignment operators
- A.
i, ii and iii only
- B.
Ii, iii and iv only
- C.
i, iii and iv only
- D.
All i, ii, iii and iv
Correct Answer
D. All i, ii, iii and ivExplanation
The correct answer is "All i, ii, iii and iv" because C# programming language provides built-in operators for arithmetic, logical, bitwise, and assignment operations. This means that all four options (i, ii, iii, and iv) are correct as they represent the different types of operators provided by C#.Rate this question:
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- 26.
Match the different Bitwise operators supported by C# with their descriptions. i) & a) Binary Left Shift Operator ii) ^ b) Binary Right Shift Operator iii) << c) Binary XOR operator iv) >> d) Binary AND operator
- A.
i-d, ii-c, iii-a, iv-b
- B.
i-b, ii-c, iii-a, iv-d
- C.
i-c, ii-a, iii-b, iv-d
- D.
I-a, ii-c, iii-d, iv-b
Correct Answer
A. i-d, ii-c, iii-a, iv-bExplanation
The correct matching of the bitwise operators and their descriptions is as follows:
- The "&" operator is the binary AND operator.
- The "^" operator is the binary XOR operator.
- The "" operator is the binary right shift operator.Rate this question:
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- 27.
State whether the following statements are True or False. i) Unlike classes, structures cannot inherit other structures or classes. ii) A structure can implement one or more interfaces. iii) Structure members can be specified as abstract, virtual or protected.
- A.
i- True, ii- False, iii-True
- B.
I- False, ii- True, iii-True
- C.
i-True, ii-True, iii-False
- D.
i- False, ii- False, iii-True
Correct Answer
C. i-True, ii-True, iii-FalseExplanation
Structures in programming cannot inherit other structures or classes, which makes statement i) true. However, a structure can implement one or more interfaces, making statement ii) false. Lastly, structure members cannot be specified as abstract, virtual, or protected, making statement iii) false.Rate this question:
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- 28.
Which of the following are the methods to assign values to an array? i) double [ ] score = {234.0, 214.5, 572.0}; ii) int [ ] marks = new int [3] {33, 45, 67}; iii) int [ ] marks = new int [ ] {33, 45, 67};
- A.
i and ii only
- B.
ii and iii only
- C.
i and iii only
- D.
All i, ii, iii
Correct Answer
D. All i, ii, iiiExplanation
The given answer is correct because all three options i), ii), and iii) demonstrate valid methods to assign values to an array. In option i), an array of type double is declared and initialized with specific values. In option ii), an array of type int is declared and initialized with specific values using the new keyword. In option iii), an array of type int is declared and initialized with specific values without specifying the size of the array. Therefore, all three options are valid methods to assign values to an array.Rate this question:
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- 29.
. In C# methods can be defined by using which of the following syntax?
- A.
A) <Method Name> (parameter list) { Method body }
- B.
B) <Method Name> <Return Type> <Access Specifier> (parameter list) { Method body }
- C.
C) <Return Type> <Method Name> <Access Specifier> (parameter list) { Method body }
- D.
D) None of the above
Correct Answer
A. A) <Method Name> (parameter list) { Method body }Explanation
In C#, methods can be defined using the syntax (parameter list) { Method body }. This syntax specifies the name of the method, the parameters it accepts, and the code that makes up the body of the method. The return type and access specifier are not included in the method definition syntax. Therefore, option A) is the correct answer.Rate this question:
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- 30.
While passing parameter to a method ……………. copies the actual value of an argument into the formal parameter of the function.
- A.
Output Parameter
- B.
Value Parameter
- C.
Reference Parameter
- D.
Initial Parameter
Correct Answer
B. Value ParameterExplanation
When passing a parameter to a method using value parameter, the actual value of the argument is copied into the formal parameter of the function. This means that any changes made to the formal parameter within the method will not affect the original argument outside of the method.Rate this question:
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Current Version
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Sep 04, 2023Quiz Edited by
ProProfs Editorial Team -
Oct 28, 2019Quiz Created by
Deepanshu Gupta