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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 is the role of the FILE structure in C?

It keeps track of file pointer and buffer

It is not used in standard C

It stores only file names

It is used to print to console

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

delete()

remove()

closefile()

fclose()

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

File handling is only possible with user-defined functions

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

You cannot write to a file using C

Files in C must always be text files

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

fwrite()

fputs()

printf()

fprintf()

5. Which function checks for file existence?

testfile()

fopen()

access()

filecheck()

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

Depends on file size

-1

7. 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

8. What does "a+" mode do?

Opens file for reading and writing; data is appended

Opens file for reading and writing; content is cleared

Opens file for reading only

Opens file for writing only

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

fseekstart()

restart()

reset()

rewind()

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

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

change()

rename()

fileedit()

move()

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

print(file, 100);

fprint(file, 100);

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

fwrite(file, 100);

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

close()

stop()

endfile()

fclose()

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

fopen()

open()

start()

fileopen()

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

fprintf()

fputs()

puts()

fwrite()

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

File is opened for writing

File is created

File is created empty

fopen() returns NULL

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

fwrite()

fputs()

fprintf()

putc()

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

fput()

fwrite()

putch()

putc()

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

Read only

Run

Rewrite

Read and write

20. Which function is used to detect file errors?

fileerror()

checkerr()

ferror()

errcheck()

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

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

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

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

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

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

fsave()

fclear()

fflush()

clearfile()

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

Opens a file for writing and overwrites the file

Opens a file in append mode

Opens a file for reading

Opens a file in binary mode

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

EOF

NULL

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

"r"

"w"

"rw"

"a"

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

100

It depends on the system

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

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

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

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

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

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

FILE

void

FILE *

int

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

fseek()

fmove()

frewind()

ftell()

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

fprintf()

None

fputs()

puts()

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

"ab"

"w"

"rb"

"wb"

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

Opens file for reading only

Appends to existing file

Opens in binary mode

Deletes content and opens for reading and writing

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

"r"

"w+"

"rb"

"a"

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

fprintf()

fputs()

fread()

fscanf()

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

printb()

fprintf()

fwrite()

fprintb()

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

readblock()

fscanf()

blockread()

fread()

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

eof()

isend()

endfile()

feof()

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

Only for writing

Only in binary mode

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

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

fgetc()

fgetchar()

readchar()

getchar()

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

gets()

fread()

readf()

fscanf()

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

File is deleted

Program gives error

File closes automatically

Data may not be written correctly

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

input()

getchar()

getch()

getc()

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

NULL

-1

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

conio.h

stdio.h

file.h

string.h

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

NULL

EOF

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

fputs()

putc()

fprintf()

fwrite()

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

-1

NULL

EOF

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

Writing

Checking file content

Using feof()

Reading

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

Binary file for appending

Text file

Binary file for reading

Binary file for writing

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

ftell()

fread()

rewind()

fseek()

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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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