File Input Output- C Programming MCQ Questions and Answers

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Each section contains 100 MCQs on File Input Output .

Which function is used to write a character to a file in C?

A) putc() B) writechar() C) putchar() D) fileputchar()

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Answer & Solution

Answer: Option A

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

What happens if you try to open a file in 'r' mode that doesn't exist in C?

A) A new file is created B) An error occurs, and the file remains unchanged C) The program terminates D) The file is deleted

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Answer & Solution

Answer: Option B

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How do you read a string from a file in C?

A) fscanf() B) readstring() C) getline() D) fgets()

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Answer & Solution

Answer: Option D

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What does the 'remove' function in C do?

A) Deletes a file B) Renames a file C) Closes a file D) Appends data to a file

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Answer & Solution

Answer: Option A

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In C, what is the purpose of the 'fflush' function?

A) To flush the standard input buffer B) To flush the standard output buffer C) To close a file D) To check if a file exists

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Answer & Solution

Answer: Option B

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Which function is used to create a new directory in C?

A) createdir() B) makedir() C) mkdir() D) newfolder()

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Answer & Solution

Answer: Option C

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How do you write an integer to a file in C?

A) putint() B) fprintf() C) writeint() D) filewriteint()

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Answer & Solution

Answer: Option B

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What is the return value of 'putc' if it fails to write a character to a file in C?

A) 0 B) 1 C) -1 D) EOF

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Answer & Solution

Answer: Option D

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Which function is used to read and write data in binary mode in C?

A) fread() B) fwritedata() C) readbinary() D) writebinary()

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Answer & Solution

Answer: Option A

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

A) To find the file number associated with a file B) To check if a file exists C) To get the file's size D) To close a file

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Answer & Solution

Answer: Option A

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