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ECAT Computer File Handling in “C” Test Online

Mustansar KhanLast Updated: May 1, 2025

ECAT Computer Science File Handling in “C” Test

ECAT Computer Science Chapter 24 File Handling in “C” Online Test

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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ECAT File Handling in “C” Test Online MCQs

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

"w"

"rb"

"ab"

"wb"

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

fileopen()

start()

fopen()

open()

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

fputs()

fprintf()

putc()

fwrite()

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

conio.h

string.h

stdio.h

file.h

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

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

print(file, 100);

fwrite(file, 100);

fprint(file, 100);

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

fclose()

stop()

endfile()

close()

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

fflush()

fclear()

clearfile()

fsave()

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

-1

NULL

EOF

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

fread()

fscanf()

fprintf()

fputs()

10. Which function checks for file existence?

access()

testfile()

fopen()

filecheck()

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

fprintf()

printf()

fwrite()

fputs()

12. What does the rb+ mode do?

Read and write binary file

Read and write text file

Read and append binary file

Read-only binary file

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

100

It depends on the system

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

Read and write

Run

Rewrite

Read only

15. What does "a+" mode do?

Opens file for reading only

Opens file for reading and writing; content is cleared

Opens file for writing only

Opens file for reading and writing; data is appended

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

fseekstart()

restart()

rewind()

reset()

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

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

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

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

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

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

FILE *

void

FILE

int

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

"a"

"w+"

"r"

"rb"

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

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

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

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

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

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

fseek()

fread()

rewind()

ftell()

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

closefile()

remove()

fclose()

delete()

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

fwrite()

fprintf()

fputs()

puts()

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

fread()

gets()

readf()

fscanf()

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

endfile()

eof()

feof()

isend()

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

-1

Depends on file size

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

fwrite()

putch()

fput()

putc()

28. 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

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

NULL

EOF

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

change()

rename()

fileedit()

move()

31. Which of the following statements is true about file handling in 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

You cannot write to a file using C

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

Opens a file in append mode

Opens a file for writing and overwrites the file

Opens a file for reading

Opens a file in binary mode

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

None

fprintf()

fputs()

puts()

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

NULL

-1

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

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

Only for writing

Only in binary mode

36. Which function is used to detect file errors?

errcheck()

ferror()

checkerr()

fileerror()

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

fwrite()

putc()

fprintf()

fputs()

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

getch()

input()

getchar()

getc()

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

It is used to print to console

It is not used in standard C

It keeps track of file pointer and buffer

It stores only file names

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

fopen() returns NULL

File is created empty

File is opened for writing

File is created

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

"rw"

"a"

"r"

"w"

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

File closes automatically

File is deleted

Data may not be written correctly

Program gives error

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

readblock()

fscanf()

blockread()

fread()

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

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

ftell()

fseek()

fmove()

frewind()

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

Checking file content

Writing

Reading

Using feof()

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

Text file

Binary file for writing

Binary file for appending

Binary file for reading

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

printb()

fprintb()

fwrite()

fprintf()

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

readchar()

fgetc()

getchar()

fgetchar()

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

EOF

NULL

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Mustansar KhanLast Updated: May 1, 2025

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ECAT Computer File Handling in “C” Test Online

ECAT Computer Science File Handling in “C” Test

ECAT Computer Science Chapter 24 File Handling in “C” Online Test

ECAT File Handling in “C” Test Online MCQs

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