This post covers 100 interview questions and answers for Kubernetes, ideal for DevOps engineers.

🚨 Critical & Frequently Asked Questions

1. What is the difference between the control plane and worker nodes?

• Control Plane: Runs the Kubernetes API server, controller manager, scheduler, and etcd (the cluster’s key-value store).
• Worker Nodes: Run user workloads (pods), managed by components like kubelet and kube-proxy.

2. What is RBAC in Kubernetes? Role-Based Access Control (RBAC) regulates access to cluster resources by defining what actions (verbs) users or service accounts can perform on which resources.

Azure NSGs: Your Cloud Network’s Virtual Bouncer

Ever felt a bit overwhelmed by cloud security, especially when it comes to controlling who can talk to your applications and servers? You’re not alone! But fear not, because Azure provides a fundamental and incredibly powerful tool to help you: the Network Security Group (NSG).

While “NSG” might sound like technical jargon, it’s actually quite straightforward when you break it down. Let’s make it easy to understand!

Introduction: The Core of Your Cloud Security Posture

In today’s dynamic cloud environments, precise control over who can access what is not just a best practice, but a critical security imperative. Microsoft Entra ID (formerly Azure Active Directory) stands as Microsoft’s foundational cloud-based Identity and Access Management (IAM) service. It serves as the central authority for all digital identities and their permissions.

This comprehensive guide will explore the essential components of Microsoft Entra ID, delve into the nuances of various access control mechanisms like Azure RBAC and Entra ID Roles, and explain how custom roles allow for unparalleled precision in managing permissions.

We’re gonna build an AWS VPC from scratch, step by step, like it’s Minecraft. 🧱

You don’t need to be a pro. You just need a little curiosity and the will to click a few buttons. Let’s do this 🚀

🤔 First things first… What is a VPC?

Imagine AWS is a huge apartment complex. You don’t want random neighbors walking into your place, right? 😤

So, you create a VPC — your own private, fenced-off zone inside AWS.

So, you’re ready to conquer the Linux terminal, eh? Whether you’re diving into DevOps, prepping for an interview, or just looking to avoid that ominous “command not found” error, mastering Linux commands is your first step into the world of endless possibilities. 🌍💻

But don’t worry, you won’t be alone—this guide is here to make Linux fun and interactive. I’m throwing in a lot of examples to help you feel confident as you navigate your Linux journey. 👾

A Beginner’s Guide to DevOps: Understanding Key Concepts

DevOps can be overwhelming when you’re just starting out—there’s a whole new world of tools, platforms, and ideas to learn. But don’t worry! I’m here to break down some of the most important concepts, tools, and practices, and show you how they all fit together. By the end of this post, you’ll have a solid understanding of the key concepts in DevOps and how they work in the real world.

🚨 What Is DAST?

DAST stands for Dynamic Application Security Testing.

Unlike SAST and SCA (which scan your code and dependencies), DAST tools like OWASP ZAP scan the live, running application — like a real attacker would.

☁️ Now That Infra Is Ready…

You’ve built infrastructure using Terraform.
Now let’s put it to use — by deploying your actual Java application onto Azure App Service.

🏗️ Why Automate Infrastructure Deployment?

Scanning Terraform code is great (and we did that in Part 4),
But at some point, you need to actually provision the infrastructure:
Virtual Networks, App Services, Storage, Event Grid, etc.

🛠️ Why Infrastructure Code Needs Scanning

We’ve secured:

• ✅ Our libraries with Snyk (SCA)

• ✅ Our application code with SonarQube (SAST)

But what about the Terraform code we use to provision our cloud resources?