DevOps

Access rights in Linux (chmod). What do the numbers mean?

How was autovacuum configured in your project?

How was the deployment carried out — what tool was used to spawn pods from the image?

Started the service, journalctl logs do not show anything. What to do?

How to find and kill a process in Linux?

What is the difference between EXPLAIN and EXPLAIN ANALYZE?

What is a replication factor in Kafka and how does min.insync.replicas work?

How to view systemd service logs?

What is an index in PostgreSQL? Why is it needed? What types are there?

What is the difference between CMD and ENTRYPOINT?

How is the CI/CD process organized at your last place of work?

Probes in Kubernetes: liveness, readiness, startup. What are they for and how do they differ?

Why does Patroni need etcd and how many nodes were in the cluster?

How did the PostgreSQL cluster work, and what did you do to optimize its performance?

How to determine what exactly is the problem with the disk? What tools to use?

Main Kubernetes controllers. What are they?

What is VACUUM in PostgreSQL and why is it needed?

Have you ever made backups of PostgreSQL? How was it done?

Requests and Limits in Kubernetes. What are they and why are they needed?

Planning time is 300ms, but the actual execution time is 300 seconds. Why is there such a difference?