MCQs on File Handling | C Programming

1. File Operations (Opening, Reading, Writing, Closing)

1. Which function is used to open a file in Python?
   • a) open_file()
   • b) open()
   • c) read()
   • d) fopen()
2. What is the purpose of the close() function in file handling?
   • a) To open a file
   • b) To close a file and release resources
   • c) To write data to a file
   • d) To read data from a file
3. Which of the following modes opens a file for reading only?
   • a) ‘r’
   • b) ‘w’
   • c) ‘a’
   • d) ‘rw’
4. Which function is used to read the contents of a file in Python?
   • a) read()
   • b) write()
   • c) open()
   • d) readlines()
5. Which mode in Python allows both reading and writing to a file?
   • a) ‘r’
   • b) ‘rw’
   • c) ‘w+’
   • d) ‘a+’
6. How do you write to a file in Python?
   • a) write()
   • b) put()
   • c) save()
   • d) write_file()
7. If the file does not exist, which mode in Python will create it?
   • a) ‘r’
   • b) ‘a’
   • c) ‘w’
   • d) ‘rb’
8. Which function is used to open a file for writing in Python?
   • a) fopen()
   • b) open()
   • c) create()
   • d) save()
9. What will happen if you try to open a file in ‘r’ mode that does not exist?
   • a) It will create a new file
   • b) It will raise an error
   • c) It will open a file with default content
   • d) It will overwrite the existing file
10. What does the flush() method do in file handling?
    • a) Clears the buffer and writes the data to the file
    • b) Closes the file
    • c) Reads the file content
    • d) Opens the file

2. Types of Files (Text vs. Binary)

11. Which of the following is true about a text file?
    • a) It can store only numeric data
    • b) It stores data in human-readable format
    • c) It stores data in binary format
    • d) It cannot be edited manually
12. A binary file stores data in:
    • a) Plain text format
    • b) Human-readable format
    • c) A non-human-readable format
    • d) A compressed format
13. Which of the following functions is used to open a file in binary mode in Python?
    • a) open(‘filename’, ‘b’)
    • b) open(‘filename’, ‘rb’)
    • c) open(‘filename’, ‘r’)
    • d) open(‘filename’, ‘wb’)
14. Which of the following is a characteristic of a text file?
    • a) The data is stored in binary format
    • b) It uses characters and is human-readable
    • c) It can only store images
    • d) It can only store encrypted data
15. Which of the following is an example of a binary file?
    • a) .txt
    • b) .csv
    • c) .exe
    • d) .html
16. When reading a file in binary mode, the read() function returns:
    • a) A string
    • b) A list of lines
    • c) A sequence of bytes
    • d) An error
17. Which mode is used to open a file for writing in binary format?
    • a) ‘wb’
    • b) ‘b’
    • c) ‘rwb’
    • d) ‘w’
18. In binary files, data is written as:
    • a) Unicode characters
    • b) ASCII characters
    • c) A sequence of bytes
    • d) Plain text
19. Text files use which encoding by default in Python?
    • a) UTF-8
    • b) ASCII
    • c) ISO-8859-1
    • d) UTF-16
20. When you open a file in binary mode, what does read() return?
    • a) A byte object
    • b) A string object
    • c) A number
    • d) An error

3. File Pointers (fopen, fclose, fread, fwrite, etc.)

21. Which function in C is used to open a file?
    • a) fopen()
    • b) read()
    • c) close()
    • d) write()
22. What is the purpose of the fclose() function in C?
    • a) To read data from a file
    • b) To write data to a file
    • c) To close the file and release resources
    • d) To open a file
23. Which C function is used to read data from a file?
    • a) read()
    • b) fread()
    • c) get()
    • d) open()
24. The fwrite() function in C is used to:
    • a) Read data from a file
    • b) Write data to a file
    • c) Open a file
    • d) Close a file
25. The fseek() function is used to:
    • a) Write data to a file
    • b) Move the file pointer to a specific location
    • c) Read data from a file
    • d) Open a file
26. The ftell() function in C returns:
    • a) The number of bytes in the file
    • b) The current position of the file pointer
    • c) The total size of the file
    • d) The last modification date
27. Which function is used to move the file pointer back to the beginning of the file in C?
    • a) fseek()
    • b) rewind()
    • c) fopen()
    • d) fclose()
28. In C, to move the file pointer to the end of the file, we use:
    • a) fseek(file, 0, SEEK_END)
    • b) fseek(file, 0, SEEK_SET)
    • c) rewind(file)
    • d) fclose(file)
29. Which function in C is used to get the current position of the file pointer?
    • a) ftell()
    • b) fseek()
    • c) fread()
    • d) fwrite()
30. The feof() function is used to:
    • a) Check if the file is open
    • b) Check if the end of the file has been reached
    • c) Close the file
    • d) Open the file

4. Error Handling in File Operations

31. Which of the following is a valid way to handle errors in Python while opening a file?
    • a) try/except block
    • b) if/else block
    • c) switch/case block
    • d) throw/catch block
32. What does the FileNotFoundError in Python indicate?
    • a) The file is empty
    • b) The file is not found
    • c) The file is corrupted
    • d) The file cannot be opened
33. How do you handle errors when reading a file in Python?
    • a) Use a try/except block
    • b) Use an if/else statement
    • c) Use a for loop
    • d) Use the error() method
34. What happens if you try to read from a file that is not open in Python?
    • a) It raises a FileNotFoundError
    • b) It raises a ValueError
    • c) It raises an IOError
    • d) It raises a SyntaxError
35. How can you check for a file’s existence in Python before opening it?
    • a) Use os.path.exists()
    • b) Use the file().exists() method
    • c) Use file.check()
    • d) Use file_exists() function
36. What will happen if a program tries to open a file without permission?
    • a) It will open in read-only mode
    • b) It will throw a PermissionError
    • c) It will create a new file
    • d) It will ignore the error
37. How do you catch errors related to file operations in Python?
    • a) try/except
    • b) catch/throw
    • c) if/else
    • d) break/continue
38. What type of error is raised if you try to write to a file that is opened in read-only mode?
    • a) FileNotFoundError
    • b) IOError
    • c) PermissionError
    • d) ValueError
39. Which function will close a file if an error occurs while reading from it?
    • a) close()
    • b) fclose()
    • c) flush()
    • d) exit()
40. If an error occurs during file operations, the program should:
    • a) Ignore the error and continue
    • b) Close the file and stop the program
    • c) Log the error and continue
    • d) Prompt the user for a new file

5. Command Line Arguments

41. Which module in Python is used to handle command-line arguments?
    • a) sys
    • b) os
    • c) argparser
    • d) commandline
42. What is the first element in the sys.argv list in Python?
    • a) The name of the script
    • b) The first command-line argument
    • c) The total number of arguments
    • d) The file name
43. How do you pass arguments to a Python script from the command line?
    • a) Using sys.argv[]
    • b) Using input()
    • c) Using read()
    • d) Using os.path()
44. What is the purpose of sys.argv in Python?
    • a) To pass file names to a program
    • b) To access environment variables
    • c) To access command-line arguments
    • d) To get user input
45. How do you pass command-line arguments to a Python script?
    • a) By specifying them after the script name
    • b) By using a configuration file
    • c) By modifying the environment
    • d) By calling input() function
46. What does sys.argv[1] represent?
    • a) The script name
    • b) The first command-line argument
    • c) The second command-line argument
    • d) The total number of arguments
47. How would you handle incorrect or missing command-line arguments?
    • a) Raise an exception
    • b) Print a message and exit
    • c) Ignore the error
    • d) Log the error
48. Which command-line argument type does Python’s argparse module support?
    • a) Integer
    • b) String
    • c) Boolean
    • d) All of the above
49. Which function is used to parse command-line arguments in Python?
    • a) parse_args()
    • b) read_args()
    • c) process_args()
    • d) get_args()
50. What is the purpose of command-line arguments in Python?
    • a) To define variables inside the script
    • b) To pass input data into the script from the terminal
    • c) To open and read files
    • d) To close files after reading

Answers

Question Number	Answer
1	b
2	b
3	a
4	a
5	c
6	a
7	c
8	b
9	b
10	a
11	b
12	c
13	b
14	b
15	c
16	c
17	a
18	c
19	a
20	a
21	a
22	c
23	b
24	b
25	b
26	b
27	b
28	a
29	a
30	b
31	a
32	b
33	a
34	c
35	a
36	b
37	a
38	c
39	a
40	c
41	a
42	a
43	a
44	c
45	a
46	b
47	b
48	d
49	a
50	b