3 pages from the guide: the cover, the contents (100 questions in 9 sections) and one complete question with its answer, code and interview tips.
Many Java developers are now expected to containerise and deploy their own services, and interviews have followed. This guide answers 100 questions in nine sections: Docker fundamentals, building Java images, the JVM inside containers, Docker Compose, Kubernetes core objects, configuration and storage, probes, rollouts and scaling, troubleshooting, and security and delivery. Answers are written around a Spring Boot service, with Dockerfiles, Compose files, Kubernetes manifests and kubectl commands, and several "what is wrong with this file?" questions.
100 questions in 9 sections, 100 code examples in a 128-page PDF (2026 edition).
A complete DevOps learning resource with coded examples, command sheets and an 80+ title book bundle across AWS, Azure and GCP.
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Answer each question aloud before reading the answer. Rewrite the Dockerfile and Deployment from the troubleshooting questions on your own service, and use the "what is wrong" questions as a review checklist. The snippets are illustrative: adapt names, versions and registries to your environment before using them.
When a pod is deleted, two things happen in parallel: the pod is removed from Service endpoints, and the kubelet runs the preStop hook then sends SIGTERM to PID 1. Endpoint removal takes a moment to reach every proxy and load balancer, so the pod may still receive requests after SIGTERM. Add a short preStop sleep, enable Spring graceful shutdown, and set terminationGracePeriodSeconds larger than both.
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It covers this topic in depth. It is one topic from the TechTribers Java Interview Series, which has all 23 parts (1,200+ questions) in one bundle.
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52 Git interview questions: the object model, branching, merge vs rebase, undoing and recovering work, workflows, hooks and Git in CI/CD.
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62 Maven interview questions: the POM and lifecycle, plugins, dependency management and conflicts, multi-module builds, BOMs, publishing and Spring Boot packaging.
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