C Programming Strings Questions with Explanation

String questions in c interview


Answer and explanation of questions are based on turbo c 3.0 compilers. Answer and explanation may vary in other compilers.

1.

What will be output when you will execute following c code?

#include<stdio.h>

void main(){

    char arr[7]="Network";

    printf("%s",arr);

}

Choose all that apply:

(A)	Network
(B)	N
(C)	Garbage value
(D)	Compilation error
(E)	None of the above

Frequently Asked C Programming Questions in Interviews

1. Write a c program to check given number is perfect number or not.

2. Write a c program to check given number is Armstrong number or not.

3. Write a c program to check given number is prime number or not.

4. Write a c program to check given number is strong number or not.

5. C program to check a number is odd or even.

6. Write a c program to check given number is palindrome number or not.

8. Write a c program to check given string is palindrome number or not.
7. Write a c program to solve quadratic equation.
8.  Write a c program to print Fibonacci series of given range.
9. Write a c program to get factorial of given number.

10. Write a c program for Floyd’s triangle.

11. Write a c program to print Pascal triangle.

12. Write a c program to generate multiplication table.
13. Write a c program to print ASCII value of all characters.
14. C program to print hello world without using semicolon
15. Write a c program which produces its own source code as its output

C Programming Trick Questions

(1) What will be output if you will compile and execute the following c code?

struct marks{

  int p:3;

  int c:3;

  int m:2;

};

void main(){

  struct marks s={2,-6,5};

  printf("%d %d %d",s.p,s.c,s.m);

}

(a) 2 -6 5

(b) 2 -6 1

(c) 2 2 1

(d) Compiler error

(e) None of these

Answer: (c)

Explanation:

Binary value of 2: 00000010 (Select three two bit)

Binary value of 6: 00000110

Binary value of -6: 11111001+1=11111010

(Select last three bit)

Binary value of 5: 00000101 (Select last two bit)

Write a c program to create dos command directory

Write a c program to create dos command: dir.

Answer:

Step 1: Write following code.

#include “stdio.h”

#include “dos.h”

void main(int count,char *argv[]){

   struct find_t q ;

   int a;

   if(count==1)

      argv[1]="*.*";

      a = _dos_findfirst(argv[1],1,&q);

      if(a==0){

         while (!a){

            printf(" %s\n", q.name);

            a = _dos_findnext(&q);

         }

      }

      else{

         printf("File not found");

      }

}

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