Explain the working principle of WebSocket and how it differs from standard HTTP connections.
133
Python
11040
584
What data types can be dictionary keys in Python?
Senior
133
What happens if string variables are added to a list (using quicksort)?
Junior
133
How does caching work in Dockerfile? How to reduce the time of subsequent builds?
Senior
133
How can a query execution plan be used to optimize database performance?
Junior — Middle
133
Where do you apply processes, threads, and where is asynchrony? Provide specific task examples.
Senior
133
Tell me about Async, Multithreading, Multiprocessing: what are they, when is it better to use each?
Middle
132
Why is GIL needed at all, given that it imposes such restrictions?
Senior
132
Why do FastAPI's synchronous handlers execute in parallel in 5 seconds instead of 10?
Middle
132
What was your purpose for using Apache Airflow? Why did you choose it specifically?
Middle
132
What will the code with a mutable default argument in function arguments output?
Senior
132
What are the main built-in collections in Python? How do lists and tuples differ, and why is a tuple needed?
Middle
132
What data types are there in Python? Mutable and immutable?
Middle
132
Have you done page parsing? Are you familiar with Scrapy, Playwright?
Middle+
132
Have you worked with vector databases? What is a vector physically?
Middle+
131
How was your monitoring organized? Prometheus, Grafana, logs?
Middle
131
How was fault tolerance organized in the recommendation service with OpenAI? How were prompts built, how were failures handled, what were the bandwidth limits?
Senior
131
When should you offload a task to Celery, and when to process it in a process pool or run_in_executor?
Senior
131
Tell about the principles of SOLID. How were they applied in your project?
Middle
131
How to properly ensure idempotency when processing a batch of documents from Kafka if the service might crash during processing?
Middle
130