Interviewed 20k Python engineers and talked about these 26 questions, all of which are classics!

Hello everyone, this is Programmer Wan Feng.

I have a friend who was interviewing for a job as a Python developer recently. Expected salary: 18-20k,

From some of the interview questions he gave me, I selected 26 worthwhile questions to share with you.

If you have any questions, you can discuss with me in the comment area~

I will also organize the detailed answers to all the questions in this article in the Python reader circle in our knowledge planet

1. Python related

1. What are the request context and application context in flask?

2. Talk about your understanding of metaclass programming

3. What are green coroutines?

4. The key of the python dictionary, what are the characteristics?

• Cannot be repeated
• Value keys must be immutable hashable types such as strings, numbers or tuples.So: a list cannot be used as a dictionary key

5. Talk about decorators and their usage in real work

6. The relationship between generators and iterators

7. The difference between django and flask

8. The difference between f query and q query in django

9. What classes does drf in django inherit from?

10. How does python implement multi-process, multi-thread, coroutine?

11. Which coroutine frameworks have you used and have you learned about FastAPI?

Second, general skills

1. Please tell me about the L3 cache of the operating system

2. How to maintain data consistency in multithreading

3. Have you used k8s?

4. Cluster, distributed, master-slave, high concurrency, please introduce these concepts respectively

5. cqrs read-write separation

6. What is your naming convention for redis at work?

7. Please tell us about your understanding of DDD

8. What does the leftmost prefix of a database index mean?

9. Writing a web framework, what aspects would you consider?

10. Quicksort, recursive logic and usage scenarios.

• The book, memorize it: Bhargava's Algorithms Illustrated

11. What are the components of the token in jwt?What is the verification principle?

12. Processes and threads are related in memory

13. In the design of menu permissions, do you use a 3-table structure or a 5-table structure, why?

3. Others

1. How did you learn technology outside of work?

• No answer for this one.

2. Have you ever done an open source project?

• Same as above.
• My open source project: python-office