Professional Python Backend Developer Assessment

Q: What is this python-backend mock test?

This is a comprehensive python-backend mock test with 30 questions covering API Design, Database Optimization, Asynchronous Processing. It simulates real technical interviews with timed conditions and provides detailed explanations.

Q: How long does the test take?

The test has a time limit of 90 minutes. You can pause and resume, but we recommend completing it in one sitting.

Q: Will I get feedback on my answers?

Yes! After each question, you receive immediate feedback with detailed explanations. At the end, you get a comprehensive report showing your strengths and areas for improvement.

Q: Is this test suitable for FAANG interview preparation?

Absolutely! Our questions are curated by FAANG interviewers and cover the exact topics and difficulty levels you'll encounter in top tech company interviews.

Question 1

When designing a RESTful API, what is the 'Idempotency' property, and which HTTP methods must adh...

Answer

The property where making multiple identical requests has the same effect as a single request; GET, PUT, DELETE, HEAD, and OPTIONS

Question 2

You are experiencing the 'N+1 Query Problem' in a Django or SQLAlchemy application. What is the m...

Answer

Use Eager Loading (e.g., `select_related` or `prefetch_related` in Django; `joinedload` in SQLAlchemy)

Question 3

In a high-traffic system, you need to offload a heavy PDF generation task. Which architecture is ...

Answer

Use a Task Queue (e.g., Celery or RQ) with a Message Broker like RabbitMQ or Redis

Question 4

What is the primary difference between JWT (JSON Web Token) and Session-based authentication?

Answer

Sessions are stateful (stored on server); JWTs are stateless (stored on client and verified via signature)

Question 5

When using Redis as a cache, what does the 'LRU' eviction policy do?

Answer

Deletes the Least Recently Used keys when the memory limit is reached

Question 6

In PostgreSQL, what is the purpose of an 'Index', and what is the trade-off of having too many?

Answer

Speeds up data retrieval (reads); slows down data modification (inserts/updates/deletes) and consumes disk space

Question 7

What is a 'Race Condition' in a backend context, and how can it be prevented during a balance upd...

Answer

Concurrent requests modifying the same record simultaneously; use Database Transactions with 'Select for Update' (Pessimistic Locking) or Optimistic Locking

Question 8

What does the 'S' in SOLID stand for, and how does it apply to a Backend Service?

Answer

Single Responsibility Principle; a class or module should have one, and only one, reason to change

Question 9

In a Microservices architecture, what is the 'API Gateway' pattern?

Answer

A single entry point for all clients that routes requests to the appropriate microservice and handles cross-cutting concerns (auth, rate limiting)

Question 10

Which Python library is the standard for 'Asynchronous Server Gateway Interface' (ASGI) applicati...

Answer

Uvicorn

Professional Python Backend Developer Assessment

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Topics Covered

What You'll Get