MCQs on File Handling | Python programming

1. Reading and Writing Files

1. Which of the following is used to open a file in Python for reading?
   • a) open('file.txt', 'r')
   • b) open('file.txt', 'w')
   • c) open('file.txt', 'a')
   • d) open('file.txt', 'x')
2. What method is used to read the entire content of a file in Python?
   • a) read()
   • b) readline()
   • c) readlines()
   • d) content()
3. How do you write a string to a file in Python?
   • a) write()
   • b) writelines()
   • c) append()
   • d) put()
4. What is the function used to open a file for writing in Python, creating it if it doesn’t exist?
   • a) open('file.txt', 'w')
   • b) open('file.txt', 'r')
   • c) open('file.txt', 'a')
   • d) open('file.txt', 'x')
5. Which method reads one line from a file in Python?
   • a) readline()
   • b) read()
   • c) readlines()
   • d) next()

2. File Modes (Read, Write, Append)

6. Which of the following file modes is used for appending data to an existing file?
   • a) 'r'
   • b) 'w'
   • c) 'a'
   • d) 'x'
7. In which mode does Python open a file for both reading and writing, without truncating the file?
   • a) 'r'
   • b) 'w'
   • c) 'r+'
   • d) 'a+'
8. Which of the following file modes will truncate the file if it already exists?
   • a) 'a'
   • b) 'r'
   • c) 'w'
   • d) 'x'
9. What file mode should you use if you want to read and write to a file without truncating it?
   • a) 'r'
   • b) 'w+'
   • c) 'r+'
   • d) 'a'
10. Which file mode is used to create a new file but fails if the file already exists?
    • a) 'r+'
    • b) 'a'
    • c) 'w'
    • d) 'x'

3. Working with Text Files and Binary Files

11. To open a file in binary mode, which mode should be added to the standard read/write mode?
    • a) 'b'
    • b) 't'
    • c) 'x'
    • d) 'bin'
12. Which of the following methods can be used to read a binary file?
    • a) read()
    • b) readline()
    • c) readlines()
    • d) readbin()
13. Which method is used to write data in binary mode to a file?
    • a) write()
    • b) writelines()
    • c) writebin()
    • d) wb()
14. Which of the following can be used to open a file in text mode for writing?
    • a) 'wb'
    • b) 'ab'
    • c) 'wt'
    • d) 'w'
15. When working with binary files, which of the following is correct for reading data from a binary file?
    • a) f.read()
    • b) f.readlines()
    • c) f.read(10)
    • d) All of the above

4. File Object Methods

16. Which method is used to close a file after performing file operations?
    • a) close()
    • b) exit()
    • c) stop()
    • d) end()
17. How do you read a specific number of bytes from a file?
    • a) read(num_bytes)
    • b) readline(num_bytes)
    • c) readlines(num_bytes)
    • d) seek(num_bytes)
18. Which of the following methods will return the current position of the file pointer?
    • a) tell()
    • b) seek()
    • c) position()
    • d) getpos()
19. How do you move the file pointer to a specific position in the file?
    • a) seek(position)
    • b) tell(position)
    • c) goto(position)
    • d) move(position)
20. Which method is used to return a list of lines from a file?
    • a) readlines()
    • b) read()
    • c) readline()
    • d) content()

5. Exception Handling in File Operations

21. What is the exception raised when trying to open a non-existent file in read mode?
    • a) FileNotFoundError
    • b) IOException
    • c) PermissionError
    • d) ValueError
22. Which of the following statements is correct for handling file-related exceptions in Python?
    • a) try-except
    • b) try-finally
    • c) try-except-finally
    • d) All of the above
23. What happens if you attempt to read from a file that has been closed?
    • a) It raises a FileNotFoundError
    • b) It raises a ValueError
    • c) It raises an IOError
    • d) It raises an AttributeError
24. Which exception is raised when there is an issue with reading or writing a file due to incorrect file permissions?
    • a) FileNotFoundError
    • b) PermissionError
    • c) OSError
    • d) ValueError
25. How do you handle an exception that occurs while performing file operations in Python?
    • a) Use try-except block
    • b) Use finally block
    • c) Use with statement
    • d) Use open() method

6. Context Managers (with statement)

26. What is the primary benefit of using a with statement when working with files?
    • a) It automatically closes the file
    • b) It helps in error handling
    • c) It prevents file corruption
    • d) It automatically opens the file
27. What does the with open('file.txt', 'r') as f: syntax do in Python?
    • a) Opens the file and automatically closes it after use
    • b) Opens the file for writing
    • c) Creates a new file if it doesn’t exist
    • d) Opens the file for reading and writing
28. Which statement is true about the with statement in Python?
    • a) It automatically closes the file even if an exception is raised
    • b) It does not close the file automatically
    • c) It raises an exception when file operations are completed
    • d) It is only used for file reading
29. In a with statement, what happens if an exception occurs within the block?
    • a) The exception is automatically handled and the file is closed
    • b) The exception is ignored
    • c) The file is not closed
    • d) The program crashes without handling the exception
30. Which of the following is correct for reading a file using a context manager?
    • a) with open('file.txt', 'r') as file:
    • b) open('file.txt', 'r') as file:
    • c) open('file.txt')
    • d) with open() as file:

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