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Operators - C Questions

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Structures - C Questions

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Files - C Questions

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printf - C Questions

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Variables - C Questions

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Switch case - C Questions

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Array - C Questions

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Functions - C Questions

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Memory Allocation

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C Variables 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 Variables 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 Variables to make your MNC interview very easy.

C Variables Questions and Answers

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

#include<stdio.h>
int main()
{
	int 1_one = 25;
	printf("%d",1_one);
	return 0;
}

A. 2

B. 25

C. Runtime error

D. Compilation error

x

 

Option: D

Explanation

Invalid variable name. Variable name must begins with either alphabet or underscore( _ ).

Answer


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

#include<stdio.h>
int main(){
	int default = 5, a = 3;
	if(a > 2)
	printf("%d",default);	
	return 0;
}

A. Compilation error

B. Runtime error

C. 5

D. 3

x

 

Option: A

Explanation

default is a C reserved keyword and hence it cannot be used.

Answer


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

#include<stdio.h>
int main()
{
	int class;
	int public = 5;
	int private = 10;
	int protected = 15;
	class = public + private + protected;
	printf("%d",class);
	return 0;
}

A. garbage value

B. Compilation error

C. Runtime error

D. 30

x

 

Option: D

Explanation

C programming don't have any access specifier. Thus it is possible to use class, Public, Private and Protected as a variable name.

Answer


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

#include<stdio.h>
int main()
{
	int _int = 5;
	printf("%d",_int);
	return 0;
}

A. Runtime error

B. 5

C. Garbage value

D. Compilation error

x

 

Option: B

Explanation

Though int is a keyword, it is prefixed with underscore, this makes it possible to use _int as a variable.

Answer


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

#include<stdio.h>
int main(){
	int _ = 5;
	int __=5;
	int ___ = _ + __;
	printf("%d",___);
	return 0;
}

A. Runtime error

B. Compilation error

C. 10

D. Some Garbage value

x

 

Option: C

Explanation

Using underscore ( _ ) alone as a variable name is too possible in C programming.

Answer


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