Computer File Handling in “C” Test Online

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Question 1

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

Answer

print(file, 100);

Answer

fprint(file, 100);

Answer

fwrite(file, 100);

Answer

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

Question 2

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

Question 3

3. What does the rb+ mode do?

Answer

Read and write binary file

Answer

Read-only binary file

Answer

Read and write text file

Answer

Read and append binary file

Question 4

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

Question 5

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

Question 6

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

Answer

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

Answer

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

Answer

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

Answer

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

Question 7

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

Answer

fseekstart()

Question 8

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

Answer

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

Answer

File handling is only possible with user-defined functions

Answer

Files in C must always be text files

Answer

You cannot write to a file using C

Question 9

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

Answer

Opens in binary mode

Answer

Appends to existing file

Answer

Deletes content and opens for reading and writing

Answer

Opens file for reading only

Question 10

10. Which function checks for file existence?

Answer

testfile()

Answer

filecheck()

Question 11

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

Question 12

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

Question 13

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

Question 14

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

Question 15

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

Question 16

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

Answer

It depends on the system

Question 17

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

Question 18

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

Question 19

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

Answer

closefile()

Question 20

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

Question 21

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

Answer

Program gives error

Answer

File closes automatically

Answer

File is deleted

Answer

Data may not be written correctly

Question 22

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

Question 23

23. What does "a+" mode do?

Answer

Opens file for reading and writing; content is cleared

Answer

Opens file for reading only

Answer

Opens file for reading and writing; data is appended

Answer

Opens file for writing only

Question 24

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

Answer

Using feof()

Answer

Checking file content

Question 25

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

Answer

It stores only file names

Answer

It keeps track of file pointer and buffer

Answer

It is not used in standard C

Answer

It is used to print to console

Question 26

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

Answer

Depends on file size

Question 27

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

Question 28

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

Answer

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

Answer

Only in binary mode

Answer

Only for writing

Question 29

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

Answer

fileedit()

Question 30

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

Answer

Binary file for appending

Answer

Binary file for writing

Answer

Binary file for reading

Question 31

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

Answer

Opens a file for reading

Answer

Opens a file in append mode

Answer

Opens a file in binary mode

Answer

Opens a file for writing and overwrites the file

Question 32

32. Which function is used to detect file errors?

Answer

errcheck()

Answer

fileerror()

Answer

checkerr()

Question 33

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

Answer

fileopen()

Question 34

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

Answer

File is created empty

Answer

File is opened for writing

Answer

File is created

Answer

fopen() returns NULL

Question 35

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

Question 36

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

Answer

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

Answer

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

Answer

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

Answer

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

Question 37

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

Question 38

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

Answer

clearfile()

Question 39

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

Question 40

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

Answer

readblock()

Answer

blockread()

Question 41

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

Question 42

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

Question 43

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

Question 44

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

Answer

readchar()

Answer

fgetchar()

Question 45

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

Question 46

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

Question 47

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

Question 48

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

Question 49

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

Question 50

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

Answer

Read and write

Question 51

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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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