Pointers - C Questions

Pointers Questions - 1 Pointers Questions - 2 Pointers Questions - 3 Pointers Questions - 4 Pointers Questions - 5 Pointers Questions - 6 Pointers Questions - 7 Pointers Questions - 8

Data Types - C Questions

Data Types Questions - 1 Data Types Questions - 2 Data Types Questions - 3 Data Types Questions - 4 Data Types Questions - 5

Operators - C Questions

Operators Questions - 1 Operators Questions - 2 Operators Questions - 3 Operators Questions - 4 Operators Questions - 5

Structures - C Questions

Structures Questions - 1 Structures Questions - 2 Structures Questions - 3 Structures Questions - 4 Structures Questions - 5

Files - C Questions

Files Questions - 1 Files Questions - 2 Files Questions - 3 Files Questions - 4 Files Questions - 5

printf - C Questions

printf Questions - 1 printf Questions - 2 printf Questions - 3 printf Questions - 4 printf Questions - 5

Variables - C Questions

Variables Questions - 1 Variables Questions - 2 Variables Questions - 3 Variables Questions - 4 Variables Questions - 5

Preprocessor Macros

Preprocessor Macros - 1 Preprocessor Macros - 2 Preprocessor Macros - 3 Preprocessor Macros - 4 Preprocessor Macros - 5

While Loop - C Questions

While Loop Questions - 1 While Loop Questions - 2 While Loop Questions - 3 While Loop Questions - 4 While Loop Questions - 5

for Loop - C Questions

for Loop Questions - 1 for Loop Questions - 2 for Loop Questions - 3 for Loop Questions - 4 for Loop Questions - 5

if else - C Questions

if else Questions - 1 if else Questions - 2 if else Questions - 3 if else Questions - 4 if else Questions - 5

Switch case - C Questions

Switch case Questions - 1 Switch case Questions - 2 Switch case Questions - 3 Switch case Questions - 4 Switch case Questions - 5

Array - C Questions

Array Questions - 1 Array Questions - 2 Array Questions - 3 Array Questions - 4 Array Questions - 5

Functions - C Questions

Functions Questions - 1 Functions Questions - 2 Functions Questions - 3 Functions Questions - 4 Functions Questions - 5

Memory Allocation

Memory Allocation - 1 Memory Allocation - 2
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C Variables Tricky 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 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

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

#include<stdio.h>
int main()
{
char *ptr = "Cat";
*ptr = 'B'; 
printf("%s", ptr);
return 0;
}

A. Cat

B. Bat

C.

D. Runtime error

x

 

Option: D

Explanation

*ptr='B', trying to change the character at base address to 'C' of a constant string, which is impossible and it leads to runtime error.

Answer


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

#include<stdio.h>
int main()
{
	char arr1[50];
	char arr2[50] = "aptitude in c";
	arr1 = arr2;
	printf("%s", arr1);
	return 0;
}

A. Compiletime error

B. Runtime error

C. garbage string

D. aptitude in c

x

 

Option: A

Explanation

arr1 refers to base address and is constant. Hence raing to lvalue required compile time error.

Answer


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

#include<stdio.h>
int main()
{
	char arr1[] = "aptitude in c";
	char arr2[] = "aptitude in c";
	if(arr1 == arr2)
	printf("cheers");
	return 0;
}

A. Runtime error

B. Compilation error

C. cheers

D. No output

x

 

Option: D

Explanation

Here we are comparing both base addresses and they never going to be same, hence No output.

Answer


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

#include<stdio.h>
int main()
{
	char *ptr, **ptr1;
	printf("%u", sizeof(p));
	printf("%u", sizeof(q));
	return 0;
}

A. Runtime error

B. 4 4

C. 2 2

D. Compilation error

x

 

Option: B

Explanation

The size of pointer variable of any data type(char, int, double, float) will be 4 and are same.

Answer


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

#include<stdio.h>
#define num 10
int main()
{
	#define num 50
	printf("%d",num);
	return 0;
}

A. 10

B. Compilation error

C. 50

D. Runtime error

x

 

Option: C

Explanation

The pre processor directives in c programming can be redefined anywhere in the program. So the most recently assigned value will be outputted.

Answer


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