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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 can be used to store structured data in files?

fprintf()

fwrite()

putc()

fputs()

2. 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

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

NULL

EOF

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

fputs()

fprintf()

fwrite()

puts()

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

fsave()

fclear()

clearfile()

fflush()

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

frewind()

fmove()

ftell()

fseek()

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

rewind()

fread()

ftell()

fseek()

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

putc()

fwrite()

putch()

fput()

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

fclose()

stop()

endfile()

close()

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

fprintf()

printb()

fwrite()

fprintb()

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

Writing

Reading

Using feof()

Checking file content

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

FILE

void

FILE *

int

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

feof()

isend()

eof()

endfile()

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

File is deleted

Data may not be written correctly

Program gives error

File closes automatically

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

File is opened for writing

File is created empty

File is created

fopen() returns NULL

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

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

fprint(file, 100);

print(file, 100);

fwrite(file, 100);

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

NULL

EOF

-1

18. Which function is used to detect file errors?

fileerror()

checkerr()

errcheck()

ferror()

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

rewind()

reset()

fseekstart()

restart()

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

conio.h

file.h

string.h

stdio.h

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

NULL

-1

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

"w"

"a"

"rw"

"r"

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

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

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

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

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

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

File handling is only possible with user-defined functions

Files in C must always be text files

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

You cannot write to a file using C

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

fileopen()

open()

fopen()

start()

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

EOF

NULL

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

Appends to existing file

Opens file for reading only

Opens in binary mode

Deletes content and opens for reading and writing

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

fread()

fscanf()

readf()

gets()

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

fputs()

fwrite()

putc()

fprintf()

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

It depends on the system

100

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

"rb"

"a"

"w+"

"r"

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

Binary file for reading

Binary file for writing

Binary file for appending

Text file

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

readchar()

fgetc()

fgetchar()

getchar()

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

Rewrite

Read only

Run

Read and write

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

Opens a file in append mode

Opens a file in binary mode

Opens a file for reading

Opens a file for writing and overwrites the file

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

Only for writing

Only in binary mode

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

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

fputs()

None

fprintf()

puts()

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

delete()

remove()

fclose()

closefile()

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

rename()

change()

move()

fileedit()

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

readblock()

blockread()

fscanf()

fread()

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

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

"wb"

"rb"

"ab"

"w"

43. What does the rb+ mode do?

Read and append binary file

Read and write binary file

Read and write text file

Read-only binary file

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

fprintf()

fread()

fscanf()

fputs()

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

It is not used in standard C

It keeps track of file pointer and buffer

It stores only file names

It is used to print to console

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

fprintf()

fputs()

printf()

fwrite()

47. Which function checks for file existence?

access()

testfile()

filecheck()

fopen()

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

getch()

getchar()

getc()

input()

49. 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", "a")

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

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

-1

Depends on file size

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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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