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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. What does the rb+ mode do?

Read and write text file

Read and write binary file

Read and append binary file

Read-only binary file

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

fputs()

fwrite()

fprintf()

putc()

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

File is created

fopen() returns NULL

File is created empty

File is opened for writing

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

100

It depends on the system

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

fprintf()

None

fputs()

puts()

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

fwrite()

printf()

fprintf()

fputs()

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

EOF

NULL

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

File closes automatically

File is deleted

Program gives error

Data may not be written correctly

9. 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")

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

Files in C must always be text files

File handling is only possible with user-defined functions

You cannot write to a file using C

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

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

rewind()

fread()

ftell()

fseek()

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

Opens a file in binary mode

Opens a file in append mode

Opens a file for reading

Opens a file for writing and overwrites the file

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

fscanf()

fread()

readblock()

blockread()

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

fflush()

fsave()

fclear()

clearfile()

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

NULL

EOF

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

fscanf()

readf()

gets()

fread()

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

input()

getch()

getchar()

getc()

18. Which function checks for file existence?

fopen()

access()

filecheck()

testfile()

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

Opens in binary mode

Opens file for reading only

Appends to existing file

Deletes content and opens for reading and writing

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

It is not used in standard C

It stores only file names

It is used to print to console

It keeps track of file pointer and buffer

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

fprintf()

fprintb()

printb()

fwrite()

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

delete()

closefile()

remove()

fclose()

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

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

-1

NULL

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

Using feof()

Writing

Checking file content

Reading

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

fprintf()

fwrite()

putc()

fputs()

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

fseekstart()

rewind()

reset()

restart()

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

"rb"

"w"

"wb"

"ab"

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

stop()

endfile()

close()

fclose()

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

file.h

stdio.h

conio.h

string.h

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

fgetc()

getchar()

readchar()

fgetchar()

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

isend()

feof()

endfile()

eof()

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

Binary file for appending

Binary file for reading

Text file

Binary file for writing

34. 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);

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

void

FILE *

int

FILE

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

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

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

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

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

37. 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

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

open()

fopen()

start()

fileopen()

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

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

Only in binary mode

Only for writing

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

-1

Depends on file size

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

fscanf()

fread()

fprintf()

fputs()

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

"rw"

"w"

"a"

"r"

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

"w+"

"r"

"a"

"rb"

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

Run

Rewrite

Read only

Read and write

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

fwrite()

fprintf()

fputs()

puts()

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

-1

NULL

EOF

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

change()

fileedit()

rename()

move()

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

ftell()

fseek()

frewind()

fmove()

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

putch()

putc()

fput()

fwrite()

50. Which function is used to detect file errors?

checkerr()

ferror()

fileerror()

errcheck()

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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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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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