Teach Cloud - Cloud, DevOps, and Python Backend Development Blog

❓ Quiz Question

Aug 12, 2026

Quiz: What is a Blue/Green Deployment strategy?

Blue/Green deployments minimize downtime and risk by spinning up the new release alongside the current version and flipping traffic at the router once validated.

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❓ Quiz Question

Aug 30, 2026

Quiz: What is the role of Chaos Engineering (e.g. Chaos Mesh, Gremlin) in DevOps?

Chaos Engineering proactively tests system fault-tolerance under turbulent conditions before unexpected real-world outages occur.

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❓ Quiz Question

Aug 30, 2026

Quiz: What is the OpenAPI Specification (formerly Swagger)?

The OpenAPI Specification standardizes API documentation, client SDK generation, and mock server creation.

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❓ Quiz Question

Aug 30, 2026

Quiz: What is the purpose of the SQL EXPLAIN command?

EXPLAIN (or EXPLAIN ANALYZE ) shows how database engines execute queries, highlighting index usage and scan costs.

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❓ Quiz Question

Aug 30, 2026

Quiz: What is the difference between `makemigrations` and `migrate` in Django?

makemigrations inspects `models.py` to compile SQL migration files; migrate applies pending migrations to the database.

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❓ Quiz Question

Aug 30, 2026

Quiz: How does `select_related` differ from `prefetch_related` in Django ORM optimization?

… prefetch_related executes separate lookups and performs Python-side joining for collections.

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❓ Quiz Question

Aug 30, 2026

Quiz: How do Django Class-Based Views (CBVs) differ from Function-Based Views (FBVs)?

Class-Based Views leverage inheritance and modular design patterns to reduce boilerplate code for common web operations.

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❓ Quiz Question

Aug 30, 2026

Quiz: What does Django ORM `F()` expression allow you to do?

F() expressions reference model field values directly in database queries, preventing race conditions during atomic updates.

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