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

Amazon ElastiCache accelerates application performance by caching frequently accessed data in sub-millisecond in-memory stores like Redis and Memcached.

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Aug 30, 2026

Quiz: What is the purpose of the HTTP OPTIONS method in REST web services?

Browsers send an OPTIONS request during CORS preflight checks to ascertain supported HTTP methods and headers before making cross-origin requests.

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Aug 30, 2026

Quiz: What three components make up a JSON Web Token (JWT)?

A JWT consists of three Base64URL-encoded strings separated by dots: Header.Payload.Signature .

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Aug 30, 2026

Quiz: Which HTTP response header is required to enable cross-origin AJAX requests in modern web browsers?

The Access-Control-Allow-Origin CORS header explicitly grants specified origins permission to read resources via browser scripts.

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Aug 30, 2026

Quiz: What key performance advantage does FastAPI offer compared to traditional synchronous Python frameworks?

FastAPI achieves high performance by leveraging ASGI (Starlette) and native async execution for non-blocking I/O.

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Oct 25, 2026

Quiz: In GitHub Actions CI/CD workflows, which top-level YAML key declares the triggers or webhook events that initiate the pipeline?

The on key defines repository events (e.g., push , pull_request , schedule ) that trigger the workflow.

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