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Cracking the Kubernetes Interview

Cracking the Kubernetes Interview

By : Viktor Vedmich, Alexander Dovnar
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Cracking the Kubernetes Interview

Cracking the Kubernetes Interview

By: Viktor Vedmich, Alexander Dovnar

Overview of this book

In the high-stakes world of cloud-native technologies, Kubernetes technical interviews are notoriously challenging, and theory-heavy resources leave candidates unprepared for real-world scenarios. This guide by Viktor Vedmich and Alexander Dovnar, two seasoned professionals with decades of combined experience in DevOps, AWS, and Kubernetes architecture, bridges that gap to help you unlock actionable strategies and insights to excel in even the toughest interviews. Beginning with core concepts such as Pods and Services, the book guides you through scaling, networking, GitOps, and deployment strategies. You’ll explore advanced topics, including security, observability, monitoring, and troubleshooting, all framed in the context of real-world interviews. Each chapter includes practical scenarios and authentic questions that test both your understanding and problem-solving skills. Rather than relying on rote memorization, this guide helps you develop the depth and confidence expected of top-tier Kubernetes professionals. By the end of this hands-on journey, you'll be ready to take on roles from junior DevOps engineer to senior architect, equipped with the practical expertise needed to stand out in today’s competitive hiring process.
Table of Contents (27 chapters)
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Lock Free Chapter
1
Part 1: Introduction to Kubernetes
4
Part 2: Schedulers, Workloads, and Scaling
8
Part 3: Networking, Services, and Security
13
Part 4: Deployment, Application Management, and GitOps
16
Part 5: Reliability, Monitoring, and Maintenance
21
Part 6: Troubleshooting and Best Practices
25
Other Books You May Enjoy
26
Index

Managing stateless applications

A single Pod is a point of failure. If the node it’s on crashes, the Pod and your application are gone. To build resilient, production-ready systems, you need a way to manage Pods automatically—ensuring a desired number of replicas are always running and healthy. This is the job of Kubernetes controllers. This section focuses on controllers designed for stateless applications, such as web servers or API gateways, where any Pod is interchangeable. We’ll start with the foundational controller, the ReplicaSet, which guarantees a specific number of Pods are running. Then, we’ll build on that concept to explore the Deployment, the most common and powerful controller you’ll use daily for handling rolling updates, rollbacks, and declarative application management.

Foundation of scaling: ReplicaSets

ReplicaSets are a foundational Kubernetes concept that facilitates scaling and self-healing functionality for your applications...

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Cracking the Kubernetes Interview
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