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Computer File Handling in “C” Test Online

Mustansar KhanLast Updated: October 15, 2025

Important Computer File Handling in “C” Question and Answer

Total Questions:	50
Time Allowed:	25 Minutes
Total Marks:	50
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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File Handling in “C” Practice Test Online With Explanation

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1. Which function can be used to remove a file?

closefile()

remove()

delete()

fclose()

2. Which of the following is used to write formatted output to a file?

printf()

fputs()

fprintf()

fwrite()

3. Which function is used to open a file in C?

open()

start()

fileopen()

fopen()

4. What does ferror() return if no error occurs?

EOF

NULL

5. What does "a+" mode do?

Opens file for writing only

Opens file for reading only

Opens file for reading and writing; content is cleared

Opens file for reading and writing; data is appended

6. Which of the following can be used to store structured data in files?

putc()

fputs()

fprintf()

fwrite()

7. Which of the following will create a new text file or overwrite if it already exists?

fopen("file.txt", "r+")

fopen("file.txt", "a")

fopen("file.txt", "r")

fopen("file.txt", "w")

8. What is the return value of fclose() on success?

-1

NULL

9. Which function is used to write a character to a file?

putch()

fput()

putc()

fwrite()

10. Which function is used to write a string to a file?

puts()

fwrite()

fputs()

fprintf()

11. In which file mode will the data be written at the end of the file?

12. Which mode is used to append data to a file?

"a"

"r"

"w"

"rw"

13. Which of the following is used to read a character from a file?

input()

getchar()

getch()

getc()

14. What happens if fopen() is called with "r" mode on a non-existent file?

fopen() returns NULL

File is created empty

File is created

File is opened for writing

15. What will fopen() return if it fails to open a file?

NULL

EOF

16. Which of the following functions is used to write a string with a newline?

None

fprintf()

puts()

fputs()

17. Which function is used to detect file errors?

ferror()

fileerror()

checkerr()

errcheck()

18. Which function returns the current position of the file pointer?

rewind()

fread()

fseek()

ftell()

19. Which of the following functions is used to flush the output buffer?

clearfile()

fflush()

fsave()

fclear()

20. Which of the following functions writes formatted data to a binary file?

printb()

fprintf()

fprintb()

fwrite()

21. Which of the following is used to write binary data to a file?

fwrite()

putc()

fputs()

fprintf()

22. What is the maximum number of files that can be open simultaneously in C?

100

It depends on the system

23. What does "w" mode do in fopen()?

Opens a file for writing and overwrites the file

Opens a file in binary mode

Opens a file in append mode

Opens a file for reading

24. Which function is used to read a block of data from a file?

readblock()

fscanf()

fread()

blockread()

25. Which of the following modes allows both reading and writing?

"rb"

"w+"

"a"

"r"

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26. What does the mode "r" in fopen() stand for?

Read only

Rewrite

Run

Read and write

27. What is the return type of fopen()?

int

void

FILE *

FILE

28. Which function moves the file pointer to a specific location?

frewind()

ftell()

fseek()

fmove()

29. Which function is used to read formatted data from a file?

gets()

fscanf()

readf()

fread()

30. What does the rb+ mode do?

Read and write binary file

Read and append binary file

Read and write text file

Read-only binary file

31. What is the role of the FILE structure in C?

It stores only file names

It is not used in standard C

It keeps track of file pointer and buffer

It is used to print to console

32. What happens when fclose() is not called?

File is deleted

Program gives error

File closes automatically

Data may not be written correctly

33. Which of the following operations is not possible in "r" mode?

Writing

Using feof()

Reading

Checking file content

34. What type of file does "rb" open?

Binary file for writing

Binary file for appending

Binary file for reading

Text file

35. What will fread() return if it fails?

EOF

NULL

-1

36. Which function is used to check the end-of-file condition?

isend()

eof()

endfile()

feof()

37. Which function returns the next character from a file?

fgetchar()

readchar()

fgetc()

getchar()

38. What does "w+" mode do to an existing file?

Deletes content and opens for reading and writing

Appends to existing file

Opens in binary mode

Opens file for reading only

39. Which of the following is a correct way to create and write to a binary file?

fopen("file.txt", "r")

fopen("file.txt", "ab")

fopen("file.txt", "wb")

fopen("file.txt", "rb")

40. Which mode in fopen() creates a new binary file for writing?

"w"

"rb"

"wb"

"ab"

41. Which of the following is correct for writing formatted data to a file?

fprintf(file, "%d", 100);

print(file, 100);

fprint(file, 100);

fwrite(file, 100);

42. Which standard library function is used to rename a file?

rename()

fileedit()

change()

move()

43. Which function checks for file existence?

access()

fopen()

testfile()

filecheck()

44. Can a file be opened for both reading and writing?

Yes, using "r+" or "w+"

Only in binary mode

Only for writing

45. Which function moves the file pointer back to the beginning of a file?

rewind()

fseekstart()

restart()

reset()

46. Which of the following statements is true about file handling in C?

You cannot write to a file using C

Files in C must always be text files

You can read, write, and append using specific file modes

File handling is only possible with user-defined functions

47. What is the output of ftell() after opening a file in read mode?

Depends on file size

-1

48. Which header file is required for file operations in C?

conio.h

string.h

stdio.h

file.h

49. Which of the following is used to read a string from a file?

fread()

fscanf()

fputs()

fprintf()

50. Which function is used to close a file in C?

fclose()

stop()

endfile()

close()

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Mustansar KhanLast Updated: October 15, 2025

Computer File Handling in “C” Test Online

Important Computer File Handling in “C” Question and Answer

File Handling in “C” Practice Test Online With Explanation

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