C Viva

Which of the following is not a valid C variable name?

• int number;

• float rate;

• int variable_count;

• int $main;

Answer explanation

How many keywords are there in C language?

• 32

• 33

• 64

• 18

What is an identifier in C language?

• An identifier is a combination of alphanumeric characters used for conditional and control statements

• An identifier is a combination of alphanumeric characters used for any variable, function, label name

• Both A and B

• None of the above

A C-style comment, simply surround the text with ___.

• /* and */

• // and //

• //

• /** and **/

Which are the fundamental data types in C?

• char

• int

• float

• All of these

For which type, the format specifier "%i" is used?

• int

• char

• float

• double

Which is the correct format specifier for double type value in C?

• %d

• %f

• %lf

• %LF

What is the correct syntax to declare a variable in C?

• data_type variable_name;

• data_type as variable_name;

• variable_name data_type;

• variable_name as data_type;

Which of the following is not an arithmetic expression?

• x = 10

• x /= 10

• x %= 10

• x != 10

What will be the output of the following C code?

#include <stdio.h>

int main()

{ int x = 20;

x %= 3;

printf("%d",x);

return 0; }

• 2

• 2.5

• Error

• Warning