Self-Assessment for Junior Python Developer Interview Questions (Issue 15)

Keywords for this issue: multithreading, multiprocessing, coroutines, performance tuning, debugging Difficulty: Beginner → Intermediate Practical

1. Basic Concurrency

1. Short Answer: What is the core difference between <span>threading</span> and <span>multiprocessing</span>?

2. Coding Question: Start a thread to execute a print task

import threading

def worker():
    print("Worker thread is running")

# Complete the thread creation and start code

3. Q&A: In what situations does multithreading not improve performance in Python? What is the reason?

4. Multiprocessing Code Completion

from multiprocessing import Process

def task():
    print("Multiprocessing task")

# Start a process to execute task

5. Short Answer: What are the two common methods for inter-process communication?

2. Coroutines and Asynchronous Programming

6. Basic Question: Write an asyncio coroutine function

import asyncio

async def hello():
    print("Hello, asyncio!")

# Complete the code to run the coroutine

7. Q&A: What are the advantages of <span>asyncio</span> coroutines compared to multithreading?

8. Short Answer: Please list the three main ways to implement asynchronous programming in Python.

3. Performance and Optimization

9. Q&A: How can you quickly identify performance bottlenecks in code? Name two tools or methods.

10. Coding Question: Optimize the following inefficient list concatenation:

result = ""
for i in range(10000):
    result += str(i)

11. Short Answer: What is the difference between shallow copy and deep copy in Python?

4. Debugging and Troubleshooting

12. Short Answer: How do you debug a Python program using <span>pdb</span>? List the basic commands.

13. Q&A: How can you check the installation path and version number of a module?

14. Coding Question: Complete the following exception handling logic:

try:
    num = int("abc")
except _______:
    print("Input is not a number")

15. Q&A: How do you locate memory leak issues in a Python program?

5. Coding Practices and Engineering

16. Short Answer: What is PEP8? Why is it important?

17. Q&A: What is the purpose of the <span>__name__ == "__main__"</span> statement?

18. Coding Question: Write a function that accepts parameters <span>*args</span> and <span>**kwargs</span> and prints them out.

19. Q&A: Explain the role of Python virtual environments and common management tools.

20. Comprehensive Question: Provide three best practices for ensuring stable operation of Python programs in a production environment.

Self-Assessment Reference

  • ≥16 correct answers: Basic to intermediate level in concurrency, debugging, and engineering awareness
  • 10-15 correct answers: Needs more practice in concurrency and performance optimization
  • <10 correct answers: Solidify single-threaded foundations and debugging skills before transitioning to concurrency

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