Python Class 12 — Core Concepts Quiz
Medium-difficulty multiple-choice questions focusing on high-leverage Python Class 12 topics: OOP, file handling, exceptions, modules, decorators, and program design.
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Quiz Questions & Answers
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Question 1: What primary benefit does inheritance provide in Python object-oriented design?
Code reuse by sharing attributes and methods from a base class
Ensuring functions run in parallel threads
Automatically optimizing runtime performance for methods
Preventing any future modification of base class code
Question 2: Which mechanism should you use to ensure a file is closed even if an error occurs while processing it?
Wrap every file operation in a try block without finally
Use a with statement (context manager) to open the file
Use os.remove immediately after opening the file
Open the file and call close only at the end of the script
Question 3: In Python, which exception type is most appropriate to raise when a function receives an argument of the wrong type?
TypeError
IndexError
ValueError
RuntimeWarning
Question 4: Which statement best describes Python decorators' typical use?
They wrap a function to add or modify behavior without changing its code
They enforce type annotations at runtime by default
They are used to serialize objects to JSON
They convert functions into classes automatically
Question 5: When designing a class, what principle does keeping attributes private and exposing clear methods support?
Polymorphism to change attribute names at runtime
Encapsulation to hide internal state and control access
Recursion to reduce memory usage
Globalization to share variables across modules
Question 6: Which import style helps avoid name collisions and clarifies origin when using functions from another module?
from module_name import *
Rewriting module functions directly into your file
Using exec to load module code dynamically
import module_name and use module_name.function()
Question 7: In a scenario where multiple exceptions might occur, what is the advantage of catching specific exceptions instead of a bare except?
It prevents any exceptions from being logged
It avoids hiding unexpected bugs and allows tailored recovery for each error
It makes code run faster by skipping exception handling internals
It automatically restarts the program from the top
Question 8: Why prefer using list comprehensions or generator expressions over manual loops for transforming collections?
They always use less memory than any manual loop
They enforce type checks at compile time
They prevent exceptions from occurring inside the loop body
They express intent concisely and can be more efficient and readable