Explain Redis/MySQL internals and containers vs VMs

Q: Explain Redis/MySQL internals and containers vs VMs

This question evaluates understanding of backend system internals and operational tooling—specifically in-memory datastore architecture (Redis), relational storage engine behavior (MySQL), and container orchestration and virtualization concepts (Docker, Kubernetes, and containers versus virtual machines).

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Software Engineering Fundamentals questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master software engineering fundamentals interviews.

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Answer the following backend fundamentals questions clearly and succinctly:

Redis internals
- What is Redis’s high-level architecture?
- What “engine” does Redis use to process requests?
- How do persistence and replication work at a high level?
MySQL internals
- What are MySQL storage engines (e.g., InnoDB)?
- How does the storage engine relate to indexes, transactions, and logging?
- What are key differences between common engines?
Docker and Kubernetes
- What is Docker (conceptually and in terms of runtime components)?
- What is Kubernetes, and what problems does it solve?
- What are the key differences between Docker containers and virtual machines ?

Explain Redis/MySQL internals and containers vs VMs

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