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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.
Test Helpful For:	ECAT Entry Test Computer Online Test Interview Questions about Computer All Universities Entrance Test Recruitments Tests

ECAT File Handling in “C” Test Online MCQs

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

100

It depends on the system

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

-1

NULL

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

fwrite(file, 100);

print(file, 100);

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

fprint(file, 100);

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

fscanf()

fread()

gets()

readf()

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

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

Files in C must always be text files

You cannot write to a file using C

File handling is only possible with user-defined functions

6. What does the rb+ mode do?

Read-only binary file

Read and write text file

Read and write binary file

Read and append binary file

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

start()

fileopen()

open()

fopen()

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

void

FILE

FILE *

int

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

Rewrite

Run

Read and write

Read only

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

getc()

input()

getch()

getchar()

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

ftell()

fseek()

rewind()

fread()

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

delete()

remove()

fclose()

closefile()

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

Checking file content

Using feof()

Writing

Reading

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

Opens a file for writing and overwrites the file

Opens a file for reading

Opens a file in binary mode

Opens a file in append mode

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

Text file

Binary file for appending

Binary file for reading

Binary file for writing

16. 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", "w")

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

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

NULL

EOF

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

fprintf()

fputs()

puts()

fwrite()

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

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

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

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

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

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

fwrite()

putc()

fprintf()

fputs()

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

fread()

fprintf()

fscanf()

fputs()

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

fprintb()

fwrite()

printb()

fprintf()

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

Program gives error

File is deleted

Data may not be written correctly

File closes automatically

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

restart()

reset()

fseekstart()

rewind()

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

"w+"

"rb"

"a"

"r"

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

"r"

"a"

"rw"

"w"

27. Which function checks for file existence?

testfile()

filecheck()

access()

fopen()

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

Only for writing

Only in binary mode

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

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

fprintf()

printf()

fputs()

fwrite()

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

NULL

-1

EOF

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

fopen() returns NULL

File is created empty

File is created

File is opened for writing

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

fwrite()

fprintf()

putc()

fputs()

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

conio.h

file.h

stdio.h

string.h

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

fgetc()

readchar()

getchar()

fgetchar()

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

Opens file for reading only

Opens in binary mode

Deletes content and opens for reading and writing

Appends to existing file

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

endfile()

close()

fclose()

stop()

37. 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

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

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

putch()

putc()

fwrite()

fput()

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

clearfile()

fflush()

fsave()

fclear()

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

Depends on file size

-1

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

EOF

NULL

43. Which function is used to detect file errors?

errcheck()

ferror()

fileerror()

checkerr()

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

frewind()

fmove()

fseek()

ftell()

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

None

fprintf()

fputs()

puts()

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

blockread()

fread()

fscanf()

readblock()

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

move()

rename()

fileedit()

change()

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

"w"

"wb"

"rb"

"ab"

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

isend()

endfile()

feof()

eof()

50. What does "a+" mode do?

Opens file for reading and writing; content is cleared

Opens file for reading and writing; data is appended

Opens file for writing only

Opens file for reading only

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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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