C Programming Multiple Choice Question - Variables And Datatypes

This section focuses on the "Variables And Datatypes" of the C programming. These Multiple Choice Questions (mcq) should be practiced to improve the C programming skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

1. How many keywords are there in c ?

A. 31
B. 32
C. 64
D. 63

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2. Which of the following is true for variable names in C?

A. Variable names cannot start with a digit
B. Variable can be of any length
C. They can contain alphanumeric characters as well as special characters
D. Reserved Word can be used as variable name

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3. Which of the following cannot be a variable name in C?

A. true
B. friend
C. export
D. volatile

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4. What is the output of this program?

        
void main()

{

int x = 10;

float x = 10;

printf("%d", x)

}

A. Compilations Error
B. 10
C. 10.0000
D. 10.10

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5. What is the output of this program?

    #include <stdio.h>

    int main()

    {

        int i;

        for (i = 0;i < 5; i++)

        int a = i;

        printf("%d", a);

    }

A. Syntax error in declaration of a
B. No errors, program will show the output 5
C. Redeclaration of a in same scope throws error
D. a is out of scope when printf is called

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6. What is the output of this program?

  #include <stdio.h>

  int var = 20;

  int main()

  {

    int var = var;

    printf("%d ", var);

    return 0;

  }

A. Garbage Value
B. 20
C. Compiler Error
D. None of these

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