Standard Library Functions - C Programming MCQ Questions and Answers

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Each section contains 100 MCQs on Standard Library Functions .

What does the 'fgets' function in C do?

A) Reads a line of text from a file B) Reads a single character from the standard input C) Compares two strings D) Converts a string to an integer

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Which function is used to open a file in C?

A) fopen() B) openfile() C) readfile() D) closefile()

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Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

What is the purpose of the 'abs' function in C?

A) To calculate the absolute value of an integer B) To find the maximum value in an array C) To convert a string to lowercase D) To calculate the square root of a number

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Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Which standard library function is used to clear the standard input buffer in C?

A) fflush() B) clearbuffer() C) clearinput() D) clrscr()

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Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

What does the 'strcpy' function in C do?

A) Copies one string to another B) Compares two strings C) Searches for a substring D) Concatenates two strings

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Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Which function is used to find the smallest integer greater than or equal to a given floating-point number in C?

A) ceil() B) floor() C) round() D) nextint()

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Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

What is the purpose of the 'strcpy' function in C?

A) Copies one string to another B) Compares two strings C) Searches for a substring D) Converts a string to an integer

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Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Which library should be included to use the 'pow' function in C?

A) math.h B) stdio.h C) cmath.h D) algorithm.h

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Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

What does the 'strcat' function in C do?

A) Concatenates two strings B) Compares two strings C) Copies one string to another D) Searches for a substring

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Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Which standard library function is used to find the largest integer less than or equal to a given floating-point number in C?

A) floor() B) ceil() C) round() D) prevint()

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

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