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C if else Interview Questions and Answers

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 if else 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 if else to make your MNC interview very easy.

C if else Questions

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

#include<stdio.h>
int main()
{
int i = 5;
  if(i = i - 5 > 4)
	  printf("inside if block");
  else
	  printf("inside else block");
return 0;
}

A. Compilation Error

B. None

C. inside if block

D. inside else block

x

 

Option: D

Explanation

Answer


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

#include<stdio.h>
int main()
{
	char str1[] = "zoho";
	char str2[] = "zoho";
	if(strcmp(str1, str2))
		printf("Strings are not same");
	else 
		printf("Strings are Same");
	return 0;
}

A. Strings are Same

B. Strings are not Same

C. Compilation Error

D. runtime Error

x

 

Option: A

Explanation

The string function strcmp always returns 0 if both strings are equal otherwise it returns a non-zero value. The above program has two strings, both are same. It executes else block.

Answer


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

#include<stdio.h>
int main()
{
	int i;
	if(scanf("%d",&i)) //if we give input as 0
		printf("inside if block");
	else
		printf("inside else block");
	return 0;
}

A. Runtime Error

B. Compilation Error

C. inside else block

D. inside if block

x

 

Option: D

Explanation

The condition will be true because the expression scanf("%d",&i) reads some input from user so condition is true and if block gets executed.

Answer


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

#include<stdio.h>
int main()
{
	if(sizeof(0))
		printf("Hai");
	else
		printf("Bye");
	return 0;
}

A. Bye

B. Hai

C. Compilation Error

D. None

x

 

Option: B

Explanation

The sizeof(0) will returns size of integer, So the condtion is true.

Answer


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

#include<stdio.h>
int main()
{
	if(sizeof('\0'))
		printf("inside if block");
	else
		printf("inside else block");
	return 0;
}

A. inside if block

B. inside else block

C. None

D. Compilation Error

x

 

Option: A

Explanation

The sizeof('\0') is 1 byte. So if block gets executed.

Answer


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