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 Preprocessor and Macros Tricky 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 Preprocessor and Macros 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 Preprocessor and Macros to make your MNC interview very easy.

C Preprocessor and Macros Questions

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

#include<stdio.h>
#define CONDITION(i)\
printf("preprocessor works\n");                         
int main()
{
	CONDITION(0);
	return 0;
}

A. Runtime Error

B. Compilation error

C. preprocessor works

D. None of the one

x

 

Option: C

Explanation

#define CONDITION(i) ends with backslash(/). So that next line following #define CONDITION(i) will be consider by the C compiler and prints preprocessor works

Answer


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

#include<stdio.h>
# define loop while(true)
int main()
{
	loop;  
	printf("preprocessor-aptitude");
	return 0;
}

A. program never ends

B. Compilation error

C. preprocessor-aptitude

D. none of the above

x

 

Option: A

Explanation

Program never ends and no output will be printed as infinite execution starts for loop; itself.

Answer


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

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

A. Compilation error

B. -

C. -5

D. 5

x

 

Option: D

Explanation

.

Answer


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

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

A. -

B. Compilation error

C. 5

D. -5

x

 

Option: B

Explanation

We cannot decrement or increment the value directly . Thus compilation error occurs.

Answer


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

#include<stdio.h>
#define sqr(x) ++x * ++x
int main()
{
	int a = 3, z;
	z = ++a * ++a;     
	a -= 3;
	printf("%d %d", sqr(a), z);
	return 0;
}

A. 25 16

B. 16 16

C. 16 25

D. 25 25

x

 

Option: C

Explanation

Line 6: a = 3 .

Line 7: z = 4 * ++a.

Line 7: z = 4 * 5.

Line 7: z = 5 * 5.

Line 7: z = 25.

Line 8: a = 5 - 3.

Line 8: a = 2.

Line 9: here line 2 will execute .

Line 2: #define sqr(2) 3 * 4.

Line 2: #define sqr(2) 4 * 4.

Line 2: #define sqr(2) 16.

Now 16 25will be printed as per our printf() function.

Answer


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