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

Checking file content

Reading

Writing

Using feof()

2. Which function checks for file existence?

fopen()

testfile()

filecheck()

access()

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

FILE *

void

FILE

int

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

Opens a file for writing and overwrites the file

Opens a file for reading

Opens a file in append mode

Opens a file in binary mode

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

"r"

"rw"

"a"

"w"

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

Binary file for reading

Text file

Binary file for writing

Binary file for appending

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

string.h

file.h

conio.h

stdio.h

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

None

puts()

fprintf()

fputs()

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

readchar()

fgetchar()

fgetc()

getchar()

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

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

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

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

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

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

frewind()

ftell()

fseek()

fmove()

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

It is not used in standard C

It is used to print to console

It stores only file names

It keeps track of file pointer and buffer

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

"a"

"r"

"rb"

"w+"

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

fscanf()

fread()

gets()

readf()

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

rewind()

fseekstart()

restart()

reset()

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

fprintf()

fputs()

printf()

fwrite()

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

NULL

-1

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

fclose()

stop()

close()

endfile()

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

Files in C must always be text files

You cannot write to a file using C

File handling is only possible with user-defined functions

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

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

fput()

putch()

fwrite()

putc()

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

Opens file for reading only

Appends to existing file

Deletes content and opens for reading and writing

Opens in binary mode

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

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

fread()

fseek()

rewind()

ftell()

24. Which function is used to detect file errors?

checkerr()

fileerror()

ferror()

errcheck()

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

EOF

NULL

-1

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

endfile()

feof()

isend()

eof()

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

Read and write

Read only

Run

Rewrite

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

NULL

EOF

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

open()

start()

fopen()

fileopen()

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

blockread()

readblock()

fread()

fscanf()

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

fclose()

remove()

closefile()

delete()

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

Depends on file size

-1

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

100

It depends on the system

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

change()

move()

fileedit()

rename()

35. What does "a+" mode do?

Opens file for reading and writing; content is cleared

Opens file for reading and writing; data is appended

Opens file for reading only

Opens file for writing only

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

fflush()

fclear()

clearfile()

fsave()

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

"wb"

"w"

"rb"

"ab"

38. What does the rb+ mode do?

Read and write text file

Read and append binary file

Read and write binary file

Read-only binary file

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

input()

getch()

getchar()

getc()

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

putc()

fputs()

fprintf()

fwrite()

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

NULL

EOF

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

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

Only for writing

Only in binary mode

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

File closes automatically

Data may not be written correctly

File is deleted

Program gives error

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

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

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

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

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

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

fputs()

fprintf()

fscanf()

fread()

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

printb()

fprintb()

fprintf()

fwrite()

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

fprintf()

fputs()

puts()

fwrite()

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

fputs()

putc()

fprintf()

fwrite()

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

fwrite(file, 100);

print(file, 100);

fprint(file, 100);

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

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

File is created empty

File is created

fopen() returns NULL

File is opened for writing

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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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