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Redis — Caching, Data Structures & Production

A practical Redis quiz for backend and platform engineers. Work through realistic choices about data structures, TTL and cache design, atomic operations, memory and eviction, persistence, messaging, replication, clustering, and troubleshooting. Questions emphasize behavior and trade-offs in production rather than memorizing commands.

backendcachingdata structuresdatabasedevops

8 chapters200 questions total

AI-assisted — how our quizzes are made

Chapters

Redis Fundamentals & Command Behavior

Keys, types, command semantics, keyspace design, and operational effects.

25 questions

Data Structures & Modeling

Strings, hashes, lists, sets, sorted sets, streams, and practical modeling choices.

25 questions

Caching, Expiration & Invalidation

Cache-aside, TTL, stale data, stampedes, consistency, and invalidation strategies.

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AWS Cloud Fundamentals

amazon web servicesawsbackendcloud computingcloud fundamentalsdevopsinfrastructureplatform engineering

15 chapters699 questions

A practical Amazon Web Services fundamentals quiz covering AWS global infrastructure, accounts and governance, IAM, VPC networking, compute, storage, databases, serverless and messaging, containers, observability, security, reliability, cost management, and infrastructure automation. Designed for developers, platform engineers, DevOps practitioners, and learners building a durable foundation for real AWS workloads.

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Kubernetes — Practical Skills & Troubleshooting

backendcloudcontainersdevopsinfrastructurek8skubernetestechnologytroubleshooting

16 chapters653 questions

A practical Kubernetes quiz for developers, platform engineers, and DevOps engineers covering the API model, Pods, workload controllers, networking, storage, configuration, scheduling, resource management, security, availability, autoscaling, observability, troubleshooting, cluster operations, and extensibility. Focused on understanding behavior, making sound production choices, and diagnosing real failure scenarios.

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Java — Comprehensive

backendconcurrencyinterviewjavajvmprogrammingtechnology

15 chapters517 questions

A comprehensive Java assessment for experienced developers covering the language, type system, object model, generics, collections, functional programming, concurrency, the Java Memory Model, JVM internals, garbage collection, I/O, reflection, modules, modern Java features, performance, diagnostics, and common production pitfalls. Focused on Java, the JDK, and the JVM rather than Spring, Hibernate, Jakarta EE, or build tools.

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