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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 standard library function is used to rename a file?

rename()

change()

fileedit()

move()

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

fseek()

rewind()

fread()

ftell()

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

You cannot write to a file using C

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

File handling is only possible with user-defined functions

Files in C must always be text files

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

getchar()

input()

getc()

getch()

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

Opens file for reading only

Opens in binary mode

Appends to existing file

Deletes content and opens for reading and writing

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

fscanf()

readblock()

blockread()

fread()

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

"a"

"rb"

"w+"

"r"

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

conio.h

file.h

string.h

stdio.h

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

endfile()

isend()

eof()

feof()

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

It depends on the system

100

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

closefile()

fclose()

delete()

remove()

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

Opens a file for reading

Opens a file in append mode

Opens a file in binary mode

Opens a file for writing and overwrites the file

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

NULL

EOF

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

frewind()

ftell()

fseek()

fmove()

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

Binary file for appending

Text file

Binary file for reading

Binary file for writing

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

Depends on file size

-1

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

putc()

fwrite()

putch()

fput()

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

"rb"

"wb"

"ab"

"w"

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

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

endfile()

close()

fclose()

stop()

21. Which function is used to detect file errors?

ferror()

fileerror()

errcheck()

checkerr()

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

fread()

fscanf()

fprintf()

fputs()

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

reset()

rewind()

fseekstart()

restart()

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

fprintf()

putc()

fputs()

fwrite()

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

fputs()

printf()

fwrite()

fprintf()

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

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

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

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

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

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

fprintf()

fputs()

puts()

fwrite()

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

EOF

NULL

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

fprintf()

None

fputs()

puts()

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

fprintf()

fputs()

putc()

fwrite()

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

NULL

-1

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

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

Only for writing

Only in binary mode

33. What does the rb+ mode do?

Read and append binary file

Read and write binary file

Read-only binary file

Read and write text file

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

readf()

fread()

gets()

fscanf()

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

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

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

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

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

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

fprintb()

fprintf()

printb()

fwrite()

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

File is opened for writing

fopen() returns NULL

File is created empty

File is created

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

It is used to print to console

It stores only file names

It is not used in standard C

It keeps track of file pointer and buffer

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

FILE *

FILE

void

int

40. What does "a+" mode do?

Opens file for reading only

Opens file for reading and writing; data is appended

Opens file for reading and writing; content is cleared

Opens file for writing only

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

"w"

"rw"

"a"

"r"

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

clearfile()

fflush()

fclear()

fsave()

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

getchar()

readchar()

fgetc()

fgetchar()

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

File closes automatically

Data may not be written correctly

File is deleted

Program gives error

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

NULL

-1

EOF

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

Read and write

Rewrite

Read only

Run

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

fopen()

fileopen()

start()

open()

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

Using feof()

Reading

Checking file content

Writing

49. Which function checks for file existence?

fopen()

filecheck()

access()

testfile()

50. 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);

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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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