C Interview Questions

1. C Program to Print an Integer (Entered by the User)

  Solution:      

            #include<stdio.h>

            Void main()     

            {

               int a;

              printf(“Enter the integer value”); 

              scanf(“%d”,&a);

             printf(“%d”,a);

              return 0;

            }

2. C Program to Add Two Integers

  Solution:

#include<stdio.h>

void main()

{

    int a,b,c;

    printf("enter integer values of a,b:");

    scanf("%d%d",&a,&b);

    c=a+b;

    printf("a+b=%d",c);

}

3. C Program to Multiply Two Floating Point Numbers

  Solution:

#include<stdio.h>                                      

void main()

{

    float a=1.52,b=2.03,c;

    c=a*b; 

    printf("%f",c);

}

4. C Program to Find ASCII Value of a Character

  Solution:

#include<stdio.h>

void main()

{

    char ch;

    printf("Enter the character:");

    scanf("%c",&ch);

    printf("ASCII value of given Char, %c = %d",ch,ch);

}

5. C Program to Compute Quotient and Remainder

  Solution:

#include<stdio.h>

  void main()

{

    int dividend,divisor,remainder,quotient;

    printf("Enter the Integer values:");

    scanf("%d %d",&dividend,&divisor);

    quotient = dividend/divisor;

    remainder = dividend%divisor;

    printf("quotient = %d \nremainder = %d",quotient,remainder);

}

6. C Program to Find the Size of int, float, double and char

  Solution:

#include<stdio.h>

void main()

{

    printf("Size of Int : %d Bytes\nFloat : %d Bytes\nDouble : %d Bytes\nChar : %d Bytes",sizeof(int),sizeof(float),sizeof(double),sizeof(char));

}

7. C Program to Demonstrate the Working of Keyword long

  Solution:

#include <stdio.h>

int main()

{

    printf("Size of int = %ld bytes \n", sizeof(int));

    printf("Size of long = %ld bytes\n", sizeof(long));

    printf("Size of long long = %ld bytes\n", sizeof(long long));

    printf("Size of double = %ld bytes\n", sizeof(double));

    printf("Size of long double = %ld bytes\n", sizeof(long double));

}

8. C Program to Swap Two Numbers

  Solution:

#include <stdio.h>

int main()

{

    int a,b,temp;

    printf("enter the numbers to get swap:");

    scanf("%d %d",&a,&b);

    printf("a=%d b=%d\n",a,b);

 temp=a;

    a=b;

    b=temp;

    printf("swap numbers: a=%d b=%d",a,b);

}