Containers & Virtualization Fundamentals
4 Topics
1
Virtual Machines vs Containers — What's the Real Difference?
A deep architectural comparison between hypervisor-based virtualization and OS-level virtualization.
A fundamental question in DevOps, SRE, and platform engineering interviews to gauge your understanding of system boundaries and resource efficiency.
2
Linux Namespaces and cgroups — How Containers Actually Work
Under the hood of Linux kernel primitives for isolation and resource limitation.
Crucial for deep system architecture, platform engineering, and security-focused roles to demonstrate you understand that containers are just isolated processes, not lightweight virtual machines.
3
Container Runtimes — Docker, containerd, CRI-O
Understanding low-level runtimes (runc) and high-level orchestrator runtime interfaces (CRI).
Frequently asked in SRE and Kubernetes Administrator interviews to test your knowledge of container orchestration layers, the CRI standard, and low-level host container interaction.
4
When to Use Containers (and when NOT to)
Evaluating workloads for containerization viability and edge cases.
Tests architectural decision-making, cost optimization awareness, and pragmatism in high-level system design interviews.