Pointers - C Questions

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Data Types - C Questions

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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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for Loop - 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 Files 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 Files 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 Files to make your MNC interview very easy.

C Files Questions and Answers

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

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

A. -1

B. 0

C. 1

D. Compilation Error

x

 

Option: D

Explanation

In C, EOF is a predefined macro constant. we can't change the value of constant. So, it results into an error message.

Answer


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

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

A. NULL

B. -1

C. 0

D. Compilation Error

x

 

Option: B

Explanation

In C, EOF - End of File which is a macro and its header file is stdio.h. In C, EOF is equal to -1 by default. We can use EOF in some programs to check whether file pointer reaches the end of the file.Refer more about Files

Answer


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

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

A. Compilation Error

B. -1

C. 0

D. 1

x

 

Option: A

Explanation

In C, EOF is a predefined macro constant. we can't change the value of constant. So, it results into an error message.

Answer


4.If fopen() functions is not able to open a file, it will returns?

A. Compilation Error

B. 0

C. EOF

D. NULL

x

 

Option: D

Explanation

In C, fopen() will returns NULL if the file is not found or unable to open the file.

Answer


5.File is a type of?

A. struct

B. int

C. char *

D. None of the above

x

 

Option: A

Explanation

In C, FILE is a predefined structure defined in "stdio.h" header file.

Answer


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