Welcome to the Input and Output in C MCQs Page

Dive deep into the fascinating world of Input and Output in C with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Input and Output in C, a crucial aspect of C Programming. In this section, you will encounter a diverse range of MCQs that cover various aspects of Input and Output in C, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within C Programming.

Check out the MCQs below to embark on an enriching journey through Input and Output in C. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of C Programming.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Input and Output in C. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Input and Output in C MCQs | Page 1 of 42

Explore more Topics under C Programming

01

C Programming Fundamentals

02

Data Types,Operators and Expressions in C

03

Control Flow Statements in C

04

Functions

05

Pointers and Arrays in C

06

Structures and Unions

07

Library Functions

08

Strings

09

File Handling in C

10

Macro and Preprocessor

Q1.

Which among the following is odd one out?

printf

fprintf

putchar

scanf

Discuss

Answer: (d).scanf

Q2.

For a typical program, the input is taken using

scanf

Files

Command-line

All of the mentioned

Discuss

Answer: (d).All of the mentioned

Q3.

What does the following command line signify?
prog1|prog2

It runs prog1 first, prog2 second

It runs prog2 first, prog1 second

It runs both the programs, pipes output of prog1 to input of prog2

It runs both the programs, pipes output of prog2 to input of prog1

Discuss

Answer: (c).It runs both the programs, pipes output of prog1 to input of prog2

Q4.

What is the default return-type of getchar()?

char

int

char *

reading character doesn’t require a return-type

Discuss

Answer: (b).int

Q5.

The value of EOF is_____

-1

Discuss

Answer: (a).-1

Q6.

What is the use of getchar()?

The next input character each time it is called

EOF when it encounters end of file

The next input character each time it is called EOF when it encounters end of file

None of the mentioned

Discuss

Answer: (c).The next input character each time it is called EOF when it encounters end of file

Q7.

Which is true?

The symbolic constant EOF is defined in <stdio.h>

The value is -1

The symbolic constant EOF is defined in <stdio.h> & value is -1

Only value is -1

Discuss

Answer: (c).The symbolic constant EOF is defined in <stdio.h> & value is -1

Q8.

What is the return value of putchar()?

The character written

EOF if an error occurs

Nothing

Both character written & EOF if an error occurs

Discuss

Answer: (d).Both character written & EOF if an error occurs

Q9.

Which is true about function tolower?

The function tolower is defined in

Converts an upper case letter to lower case

returns other characters untouched

None of the mentioned

Discuss

Answer: (d).None of the mentioned

Q10.

What is the output of this C code?

#include <stdio.h>
    int main()
    {
        char c = '�';
        putchar(c);
    }

Compile time error

Nothing

Undefined behaviour

Discuss

Answer: (b).Nothing

Page 1 of 42

Welcome to the Input and Output in C MCQs Page

Input and Output in C MCQs | Page 1 of 42

Explore more Topics under C Programming

C Programming Fundamentals

Data Types,Operators and Expressions in C

Control Flow Statements in C

Functions

Pointers and Arrays in C

Structures and Unions

Library Functions

Strings

File Handling in C

Macro and Preprocessor

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