POC Concurrency & Multithreading

Question 1

What is the Global Interpreter Lock (GIL) in Python?

Accepted Answer

A mutex that prevents multiple threads from executing Python bytecodes simultaneously

Answer

A global variable that tracks the state of all active threads

Answer

A lock mechanism that automatically prevents deadlocks

Answer

A garbage collection barrier used to free thread-local storage

Question 2

Which Python module provides the Thread class for creating and managing threads?

Accepted Answer

threading

Answer

multiprocessing

Answer

concurrent

Answer

asyncio

Question 3

What is the key difference between threading and multiprocessing in Python?

Accepted Answer

Threading shares memory space; multiprocessing uses separate memory spaces per process

Answer

Threading uses separate memory spaces; multiprocessing shares memory

Answer

Both threading and multiprocessing use the same shared memory space

Answer

Both threading and multiprocessing use fully isolated memory spaces

Question 4

Which method must be called to actually start executing a thread after creating a Thread object?

Accepted Answer

thread.start()

Answer

thread.run()

Answer

thread.execute()

Answer

thread.begin()

Question 5

What does calling thread.join() accomplish in a Python program?

Accepted Answer

Blocks the calling thread until the joined thread finishes execution

Answer

Merges two threads into a single execution flow

Answer

Immediately terminates the target thread

Answer

Restarts the thread from the beginning

Question 6

What Python keyword is used to define an asynchronous function (coroutine)?

Accepted Answer

async

Answer

await

Answer

coroutine

Answer

asynchronous

Question 7

What is a race condition in the context of multithreaded Python programs?

Accepted Answer

A bug where program output depends on the unpredictable timing and ordering of thread execution

Answer

A performance issue caused by threads competing for CPU time

Answer

A memory error caused by creating too many threads simultaneously

Answer

A deadlock scenario where threads block each other indefinitely