Copy Of C Quiz

1. C can be used on ?

Only DOS

Only Linux

Only Windows

All of these

C is a programming language that is highly versatile and can be used on multiple operating systems. It is compatible with DOS, Linux, and Windows, making it a widely used language across different platforms. Therefore, the correct answer is "All of these" as C can be used on all of these operating systems.

Explanation

C is a programming language that is highly versatile and can be used on multiple operating systems. It is compatible with DOS, Linux, and Windows, making it a widely used language across different platforms. Therefore, the correct answer is "All of these" as C can be used on all of these operating systems.

2. Is ["For Boolean Variable, Zero is used to represent false, and One is used to represent true."] true or false?

True

False

This statement is true. In Boolean logic, which is used in computer programming and digital electronics, the value of zero is used to represent false, while the value of one is used to represent true. This convention allows for logical operations and comparisons to be performed on Boolean variables.

Explanation

This statement is true. In Boolean logic, which is used in computer programming and digital electronics, the value of zero is used to represent false, while the value of one is used to represent true. This convention allows for logical operations and comparisons to be performed on Boolean variables.

3. C programming language was developed in 1972 by ________________ at bell laboratories of AT&T (American Telephone & Telegraph).

Ken Thompson

Peter Norton

Dennis Ritchie

Martin Richards

Dennis Ritchie is the correct answer because he was one of the key developers of the C programming language. Along with Ken Thompson, he created C at Bell Laboratories in 1972. Ritchie's contributions to C were instrumental in its development and popularization, making it one of the most widely used programming languages today.

Explanation

Dennis Ritchie is the correct answer because he was one of the key developers of the C programming language. Along with Ken Thompson, he created C at Bell Laboratories in 1972. Ritchie's contributions to C were instrumental in its development and popularization, making it one of the most widely used programming languages today.

4. Which of the following special symbol can be used in a variable name?

* (asterisk)

- (hyphen)

| (pipeline)

_ (underscore)

The underscore symbol can be used in a variable name. In many programming languages, including Python and JavaScript, the underscore is allowed as a character in variable names. It is commonly used to separate words in a multi-word variable name, creating a more readable and understandable code. For example, a variable could be named "my_variable" or "user_name".

Explanation

The underscore symbol can be used in a variable name. In many programming languages, including Python and JavaScript, the underscore is allowed as a character in variable names. It is commonly used to separate words in a multi-word variable name, creating a more readable and understandable code. For example, a variable could be named "my_variable" or "user_name".

5. #include<stdio.h> int main() { int n; for(n = 1; n!=8; n++) { printf("n = %d", n--); } return 0; } How many times will the loop run?

Zero times

Seven Times

Eight Times

Infinite Times

The loop will run infinitely because the statement `n--` in the `printf` function will decrement the value of `n` after it is printed. As a result, the condition `n!=8` will always be true, causing the loop to continue indefinitely.

Explanation

The loop will run infinitely because the statement `n--` in the `printf` function will decrement the value of `n` after it is printed. As a result, the condition `n!=8` will always be true, causing the loop to continue indefinitely.

6.

#include<stdio.h>
int main()
{
    int a;
    printf("%d\n", sizeof(a));
    return 0;
}

What is the output of the program?

2

4

Compiler Dependent

Garbage Value

The output of the program is "Compiler Dependent". The sizeof() function in C returns the size in bytes of its operand. However, the size of an int data type is not fixed and can vary depending on the compiler and the system being used. Therefore, the output of sizeof(a) can be different on different compilers or systems.

Explanation

The output of the program is "Compiler Dependent". The sizeof() function in C returns the size in bytes of its operand. However, the size of an int data type is not fixed and can vary depending on the compiler and the system being used. Therefore, the output of sizeof(a) can be different on different compilers or systems.

7. #include int main() { int a=5; if(a) printf("1"); printf("2"); else printf("3"); printf("4"); return 0; }

1

12

2

ERROR (misplaced if/illegal else without matching if.)

The given code will result in an error because the if statement is not properly structured. The if statement is missing curly braces {}, so only the first printf statement is considered as part of the if statement. The second printf statement is outside of the if statement, which causes a syntax error. Additionally, the else statement does not have a corresponding if statement, which is also a syntax error. Therefore, the code will not compile and will result in an error.

Explanation

The given code will result in an error because the if statement is not properly structured. The if statement is missing curly braces {}, so only the first printf statement is considered as part of the if statement. The second printf statement is outside of the if statement, which causes a syntax error. Additionally, the else statement does not have a corresponding if statement, which is also a syntax error. Therefore, the code will not compile and will result in an error.

8. What will be the output of following program ?

#include <stdio.h>
void main()
{
	if(!printf(""))
		printf("Okkk");
	else
		printf("Hiii");
}

Okkk

Hiii

Error

None of these

The program first checks the condition inside the if statement, which is the output of the printf function. The printf function prints an empty string and returns the number of characters printed. In this case, since the string is empty, it returns 0. The condition in the if statement is "!0", which evaluates to true. Therefore, the code inside the if statement is executed and "Okkk" is printed.

Explanation

The program first checks the condition inside the if statement, which is the output of the printf function. The printf function prints an empty string and returns the number of characters printed. In this case, since the string is empty, it returns 0. The condition in the if statement is "!0", which evaluates to true. Therefore, the code inside the if statement is executed and "Okkk" is printed.

9. #include <stdio.h> void main() { int x=22; if(x=10) printf("TRUE"); else printf("FALSE"); }

Error

True

False

None of these

The correct answer is "True" because the condition in the if statement is "x=10", which is an assignment statement. In C programming, the value of an assignment statement is the value assigned to the variable, which in this case is 10. Since 10 is considered as a true value, the code inside the if statement will be executed, resulting in the output "True".

Explanation

The correct answer is "True" because the condition in the if statement is "x=10", which is an assignment statement. In C programming, the value of an assignment statement is the value assigned to the variable, which in this case is 10. Since 10 is considered as a true value, the code inside the if statement will be executed, resulting in the output "True".

10. Which of the following are incorrect statements? If int a=10. 1) if( a==10 ) printf("Hello"); 2) if( 10==a ) printf("Hello"); 3) if( a=10 ) printf("Hello"); 4) if( 10=a ) printf("Hello");

Only 4

3 and 4

2 and 4

2, 3 and 4

The correct answer is "Only 4". This is because the statement "if( 10=a )" is incorrect syntax in C programming. In C, the assignment operator is "=", not "==". Therefore, the correct syntax should be "if( a=10 )". The other statements are correct and will print "Hello" if the condition is true.

Explanation

The correct answer is "Only 4". This is because the statement "if( 10=a )" is incorrect syntax in C programming. In C, the assignment operator is "=", not "==". Therefore, the correct syntax should be "if( a=10 )". The other statements are correct and will print "Hello" if the condition is true.