Bird
0
0

You want to open a file to read and write without truncating it, and create it if it does not exist. Which mode is correct?

hard📝 Application Q9 of 15
Python - File Handling Fundamentals
You want to open a file to read and write without truncating it, and create it if it does not exist. Which mode is correct?
A"r+"
B"a+"
C"w+"
D"x+"
Step-by-Step Solution
Solution:

  1. Step 1: Understand "a+" mode

    "a+" opens file for reading and appending, creates if missing, does not truncate.

  2. Step 2: Compare with other modes

    "r+" errors if missing, "w+" truncates, "x+" errors if exists.

  3. Final Answer:

    "a+" mode -> Option B

  4. Quick Check:

    Read/write append without truncate = a+ [OK]
Quick Trick: Use "a+" to read/write append and create if missing [OK]
Common Mistakes:
  • Using "r+" which fails if file missing
  • Using "w+" which truncates file
  • Using "x+" which errors if file exists

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More Python Quizzes
Classes and Object Lifecycle - Object lifecycle overview - Quiz 2easy Context Managers - Automatic resource cleanup - Quiz 10hard Custom Exceptions - Creating exception classes - Quiz 4medium Encapsulation and Data Protection - Purpose of encapsulation - Quiz 14medium Encapsulation and Data Protection - Protected attributes - Quiz 12easy Inheritance and Code Reuse - Inheriting attributes and methods - Quiz 14medium Magic Methods and Operator Overloading - String representation methods - Quiz 2easy Methods and Behavior Definition - Methods with return values - Quiz 9hard Multiple Inheritance and Method Resolution - Best practices for multiple inheritance - Quiz 12easy Standard Library Usage - Environment variables usage - Quiz 7medium