Platform — DevOps basics devs still get asked

This site targets Python backend interviews. Pure DevOps topics live here as a reference — most backend loops ask Docker and Git, sometimes Linux and networking basics. The rest is only in-depth relevant for platform/SRE roles.

How to read this page

If you are interviewing for a backend role, skim Docker, Git, and Linux. If you are interviewing for a platform / SRE / infra role, all of these matter and this is not enough — treat it as a warm-up.

Docker

Images, containers, volumes, compose. Asked at almost every backend loop.

Git + CI/CD

Rebase vs merge, reset vs revert, common CI gates.

Linux

Signals, file descriptors, permissions, one-line grep/awk/ps.

Networking

TCP/UDP, DNS, HTTP status codes, CIDR. Comes up in system design too.

Kubernetes

Pods, deployments, probes. Skip unless you hit platform/SRE roles.

Observability

Metrics / logs / traces, SLO vs SLI. Senior signal topic.

Security

Vulnerability classes, password KDFs, JWT gotchas.