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C Switch Case Questions

In most of the MNC interview questions such as in ZOHO interview question, IVTL Infoview interview questions, Amazon interview questions, GOOGLE interview questions, Infosys interview questions and even in Voonik interview questions, We come across several Tricky C Questions about which 2:5 of the questions are from Switch Case in c. Solving that kind of tricky C questions is not an easy task for all C programmers. We need more practices to solve it with ease. So we provide 25+ interesting C questions in Switch Case to make your MNC interview very easy.

C Switch Case Questions

1. What will be the output of the C program?

#include<stdio.h>
int main()
{
int i = 1;
switch(i)
{
	case 1:
	  printf("Hai ");
    default:
      printf("Bye");
}
return 0;
}

A. Compilation Error✘

B. Bye✘

C. Hai✘

D. Hai Bye✔

x

Option: D

Explanation

The case statement should have a break statement at the end of case block, in the above program there is no break statement after
case 1:
printf("Hai ");
block, so the control continuosly executes the default block. The case: block with break statement will be
case 1:
printf("Hai ");
break;

✉ Answer

2. What will be the output of the C program?

#include<stdio.h>

int main()
{
	char ch = 65;
	switch(ch)
	{
		case 'A':
		printf("Apple");
		break;
		case 'B':
		printf("Bing");
		break;
		default:
		printf("Bye");
		break;
	}
return 0;
}

A. Apple✔

B. Bing✘

C. Bye✘

D. Compilation Error✘

x

Option: A

Explanation

The above program has a variable ch which is intialised by a value 65(ASCII code of 'A'). So the switch compares the with case blocks where case 'A': matches and executed.

✉ Answer

3. What will be the output of the C program?

#include<stdio.h>
int main()
{
	int i = 65;
	
	switch(i)
	{
		case 65:
		printf("Integer 65");
		break;
		case 'A':
		printf("Char 65");
		break;
		default:
		printf("Bye");
	}
return 0;
}

A. Char 65✘

B. Integer 65✘

C. Bye✘

D. Compilation Error✔

x

Option: D

Explanation

Compilation Error: Duplicate case.
The above C program will show you an error becuase the switch block have two cases with same value. i.e)case 65: and case 'A': these two cases are same. Switch block will not allow duplicate cases, so it shows you an error.

✉ Answer

4. What will be the output of the C program?

#include<stdio.h>
int main()
{
	int i = 65;
	char ch = 'B';
	switch(ch, i)
	{
		case 65:
		printf("Integer");
		break;
		case 'B':
		printf("Char");
		break;
		default:
		printf("Bye");
	}
	return 0;
}

A. Bye✘

B. Integer✔

C. Char✘

D. Compilation Error✘

x

Option: B

Explanation

The switch(ch, i) simulates switch(expression1, expression2). Whenever expressions seperated by a comma operator, the compiler first evaluates expression1 then evaluates expression2 and it executes further based on expression2.
NOTE:If you can't able to understand our explanation part please contact us via support@2braces.com.

✉ Answer

5. What will be the output of the C program?

#include<stdio.h>
int main()
{
	int i = 1;
	i++;
	switch(i--)
	{
		case 1:
		printf("case 1 executed");
		break;
		case 2:
		printf("case 2 executed");
		break;
		default:
		printf("default block executed");
		break;
		
	}
return 0;
}

A. case 2 executed✔

B. case 1 executed✘

C. default block executed✘

D. Compilation Error✘