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Kubernestes Interview questions

Frequently Asked Production Commands kubectl get all -A kubectl describe pod kubectl logs kubectl exec -it kubectl top nodes kubectl top pods kubectl get events kubectl rollout history kubectl cordon kubectl drain kubectl uncordon If you want, I can also provide: * Kubernetes scenario-based interview questions * Kubernetes troubleshooting questions * Kubernetes networking deep-dive * Kubernetes real-time production issues * Kubernetes interview answers in practical manner * Kubernetes mock interview for experienced meantime u have to give the commands for each questions Critical Kubernetes Interview Questions with Practical Commands 1. How do you check cluster information? Commands kubectl cluster-info kubectl get nodes kubectl get componentstatus kubectl version Purpose * Check API server * Check scheduler * Verify cluster health 2. How do you check all resources in Kubernetes? Commands kubectl get all -A kubectl get pods -A kubectl get svc -A kubectl get deployments -A kubec...
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LInux Interview questions for experienced

1. Service Management (systemd) Q: How do you manage services in modern Linux? Answer: Using systemd Common commands: systemctl start nginx systemctl stop nginx systemctl restart nginx systemctl status nginx systemctl enable nginx systemctl disable nginx Q: Service is not starting. How will you debug? Answer: systemctl status journalctl -u Check: Syntax errors Port conflicts Permission issues Q: Difference between service and systemctl? service → old SysV init systemctl → modern systemd 🔹 2. Boot Process & Targets Q: Explain Linux boot process briefly Answer: BIOS → GRUB → Kernel → Init (systemd) → Services Q: How to change runlevel in systemd? Runlevels replaced by targets: systemctl get-default systemctl set-default multi-user.target systemctl isolate rescue.target 🔹 3. Process Management Q: How do you find high CPU process? top htop ps -aux --sort=-%cpu Q: Kill a process safely vs forcefully? kill -15 # graceful kill -9 # force Scenario: Q: Process keeps restarting au...
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Linux Interview Questions for experienced

Q- How will you change the default user id value in Linux? Q- root# rm -rf /tmp/test gives error operation not permitted. Reason? Q- /etc/hosts (Which RPM is responsible for creating this file). Q- What is the difference between RPM and YUM? Q- What is the difference between Hard and Soft Link? Q- What is a sticky bit? Q- How will you check open ports on Linux Server? Q- How will you check open ports on remote servers (without login) Q- Your site is throwing 500 error, how will you start troubleshooting? Q- How will you start troubleshooting if your site is down? Q- How will you create space on disk if it is showing 100% used? Q- What is a package of sar command and what does it do?
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Kubernestes interview questions

Core Kubernetes Concepts 1. What happens when you run kubectl apply -f deployment.yaml? API server receives request Validates YAML Stores desired state in etcd Scheduler assigns Pod to node Kubelet pulls image & starts container 2. Difference between Deployment, StatefulSet, and DaemonSet? Deployment → stateless apps (web apps) StatefulSet → stateful apps (DBs like MySQL) DaemonSet → runs one pod per node (logging, monitoring agents) 3. What is etcd? Distributed key-value store Stores cluster state (source of truth) 4. What is a Pod? Smallest deployable unit Can have one or multiple containers Shares network + storage 🔹 Networking (Very Important) 5. How does Kubernetes networking work? Each Pod gets unique IP Flat network (no NAT between pods) Uses CNI plugins (Calico, Flannel) 6. Difference between ClusterIP, NodePort, and LoadBalancer? ClusterIP → internal access NodePort → exposes via node IP LoadBalancer → cloud external LB 7. What is Ingress? HTTP/HTTPS routing Works with In...
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Docker Interview Questions: 1).🔥 Docker Interview Questions (5+ Years Experience) 1. What is the difference between Docker Image and Container? Answer: * Image → Blueprint (read-only template) * Container → Running instance of image 👉 Example: docker build -t myapp . docker run -d myapp 2. Explain Docker Architecture Answer: * Docker Client * Docker Daemon (dockerd) * Docker Registry (Docker Hub / ECR) * Docker Objects (Images, Containers, Networks, Volumes) 👉 Check: docker info 3. What happens when you run docker run? Answer (Important): 1. Check image locally 2. Pull from registry if not present 3. Create container 4. Setup filesystem (UnionFS) 5. Allocate network 6. Start process 4. Difference: CMD vs ENTRYPOINT Answer: * CMD → Default command (can override) * ENTRYPOINT → Fixed command 👉 Example: CMD ["echo", "Hello"] ENTRYPOINT ["echo"] 5. Multi-stage build – Why? Answer: * Reduce image size * Remove build dependencies 👉 Example: FROM...
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1. How do you check system performance? Use multiple tools depending on need: top htop uptime vmstat 1 iostat -x 1 free -m sar -u 1 5 👉 Real-time: CPU bottleneck → check top & vmstat 2. How do you find high CPU consuming process? top ps -eo pid,ppid,cmd,%mem,%cpu --sort=-%cpu | head Kill process: kill -9 3. How do you check memory usage? free -m cat /proc/meminfo top 4. Difference between soft link & hard link? ln file1 hardlink ln -s file1 softlink Hard link → same inode Soft link → pointer (like shortcut) 5. How do you find large files? find / -type f -size +100M du -ah / | sort -rh | head -20 6. How do you monitor logs in real-time? tail -f /var/log/messages tail -f /var/log/syslog 7. What is inode? Check inode: ls -i df -i 👉 Stores metadata of file 8. How do you manage disk space? df -h du -sh * Clean: rm -rf unwanted_files 9. How do you check open ports? netstat -tulnp ss -tulnp 10. How do you check running services? systemctl status nginx systemctl list-units --type=se...
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Kubernestes inteview questions for experienced:
 🔥 Kubernetes Interview Questions with Commands 1. How do you check all resources in a cluster? kubectl get all 👉 Namespace specific: kubectl get all -n dev 2. How do you create a resource? kubectl apply -f deployment.yaml 3. How do you check pod details? kubectl describe pod pod-name 4. How do you check pod logs? kubectl logs pod-name 👉 Multi-container pod: kubectl logs pod-name -c container-name 5. How do you exec into a pod? kubectl exec -it pod-name -- /bin/bash 6. How do you check nodes? kubectl get nodes kubectl describe node node-name 7. How do you scale a deployment? kubectl scale deployment app-name --replicas=5 8. How do you check deployment status? kubectl get deployments kubectl describe deployment app-name 9. How do you check rollout status? kubectl rollout status deployment app-name 10. How do you rollback deployment? kubectl rollout undo deployment app-name 11. How do you check services...
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