🔶 Docker 🐬 Scenario-Based Interview Questions ❓


1. You are running a containerized application that crashes intermittently without logging anything useful. How do you debug this behavior?
2. Your CI/CD pipeline pushes a new Docker image that fails only in production, not in staging. How would you isolate and resolve the discrepancy?
3. Your Docker image builds are inconsistent across developers’ machines. How would you ensure repeatable builds?
4. How would you securely inject secrets into a container without hardcoding them in Dockerfile or exposing them in environment variables?
5. A container using a volume is not syncing changes back to the host machine. How do you diagnose and resolve this?
6. You need to migrate your local Docker-based app to Kubernetes. What Docker-specific configurations might cause issues during the migration?
7. Your container uses a large base image and takes a long time to download in remote environments. What strategies can you apply to improve this?
8. You notice a container has exited with an OOMKilled (Out Of Memory) status. How do you investigate and prevent this?
9. How would you monitor file system usage and inode exhaustion in a running container?
10. Your team needs to run GPU-based containers on a shared host. How do you design a secure and performant setup?
11. You want to roll back to a previous container version but don't have the previous Dockerfile. How do you retrieve and use the old image?
12. You need to isolate a set of containers with custom firewall rules. How do you implement this using Docker’s networking capabilities?
13. A container exposes multiple ports, but some are not accessible externally. How do you verify and expose the correct ports?
14. How do you configure Docker for a multi-architecture build (e.g., building for x86 and ARM simultaneously)?
15. Your Dockerfile uses ADD to fetch remote URLs, but the builds fail due to SSL errors in CI. How do you debug and solve this?
16. You notice layers in your Docker image are not being cached during builds. What could be causing this?
17. You are required to enforce immutability for Docker containers in production. How would you approach this?
18. How would you implement a security scanning workflow integrated with your CI/CD process for Docker containers?
19. What would you do if Docker container logs are rotated too frequently and important logs are being lost?
20. You suspect your container image has been tampered with. How do you validate its authenticity?
21. How do you enforce policy controls such as image whitelisting in a Docker deployment?
22. A base image you use has been deprecated. How do you manage and migrate all dependent services with minimal downtime?


👍👍👍👍 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

🚨 Real-World AWS Interview Questions You Need to Know in 2025 🚨


🔥 Ace your next cloud interview with these must-know questions covering multi-account setup, migrations, security, scalability & more!

➡️ Identity & Access Management
1. How would you use AWS Control Tower for secure multi-account setup?
2. How do you manage permission boundaries in AWS SSO?
3. How do you enable MFA in AWS Cognito?
4. How do you secure/manage identities in Cognito?
5. How do you implement RBAC in AWS?
6. How do you enforce MFA for IAM users?
7. How do you design IAM policies with least privilege?

➡️ Networking & DNS
8. How would you configure Route 53 for global HA?
9. How do you implement weighted routing across regions?
10. What’s the process to map a custom domain to an S3 static site?

➡️ Security & WAF
11. How do you use AWS WAF to block bot attacks?
12. How do you configure AWS Shield for DDoS protection?
13. How to create custom WAF rules for specific threats?

➡️ Storage & Backup
14. How to securely store files in S3?
15. How to restrict public access but allow uploads?
16. How to enable automatic backup & versioning?

➡️ Email with AWS SES
17. How to configure SES for transactional emails?
18. How to improve deliverability & avoid spam?
19. How to set up SPF, DKIM & DMARC?

➡️ Compute & Scaling
20. How do you configure EC2 Auto Scaling for traffic spikes?
21. How to secure EC2 instances from unauthorized access?
22. What are EC2 cost optimization techniques?

➡️ Database & Migration
23. How do you migrate SQL Server with minimal downtime?
24. How to implement automated RDS backups?
25. How to configure RDS for high availability?

➡️ Infrastructure as Code
26. How would you structure Terraform for AWS infra?
27. What’s your preferred on-prem to AWS migration strategy?

➡️ Monitoring & Auditing
28. How do you use CloudWatch alarms for CPU usage?
29. How to analyze app performance with CloudWatch + X-Ray?
30. How to audit API activity with CloudTrail?

➡️ Load Balancing
31. Which ELB type supports both HTTP & TCP traffic?
32. How to set up ALB with Auto Scaling for traffic spikes?
33. How to protect ALB from DDoS & authenticate users?

✅ Save this list. Practice daily. Dominate your AWS interviews in 2025.


📱 Follow me on GitHub for more DevOps/Cloud Free Resources:
➡️ https://github.com/NotHarshhaa

📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

🖥 25 Blogs to Learn 25 Kubernetes Concepts:

1) Kubernetes Architecture: https://lnkd.in/gmRDrusm
2) POD Lifecycle: https://lnkd.in/g9cbpma4
3) etcd Setup: https://lnkd.in/gFzjeCXu
4) etcd Locks: https://lnkd.in/gYbtKsK2
5) crashloopbackoff: https://lnkd.in/gyKyBRt2
6) OOMKilled: https://lnkd.in/gznwimNr
7) ImagePullBackOff: https://lnkd.in/gzCTSWRG
8) CreateContainerConfigError: https://lnkd.in/g6Z5TdBt
9) CreateContainerError: https://lnkd.in/gG_2nHb7
10) RunContainerError: https://lnkd.in/ggQcqi5t
11) Node Disk Pressure: https://lnkd.in/gu9eFiRw
12) Node Not Ready: https://lnkd.in/gksPqZYF
13) Pod Disruption Budget: https://lnkd.in/gNZNxewk
14) RBAC: https://lnkd.in/g2Pr_aA5
15) DNS Optimization: https://lnkd.in/gmNkjZeV
16) Kubernetes Controller: https://lnkd.in/gZ6pkzMt
17) pod.yaml Breakdown: https://lnkd.in/g7yhk_tS
18) Kubernetes Upgrades: https://lnkd.in/g3nwTgwA
19) KEDA vs Karpenter: https://lnkd.in/gED3Vypc
20) Operator vs Helm: https://lnkd.in/gSeg56ME
21) Kubernetes Air Gap: https://lnkd.in/gxxqWdEE
22) QoS Classes: https://lnkd.in/gr_QU8BN
23) Kubernetes CI/CD: https://lnkd.in/gpk_Et74
24) Deployment Strategies: https://lnkd.in/gdU_8A38
25) Security Contexts: https://lnkd.in/gNQizuFy


📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

🔄 90% of DevOps engineers will fail to answer these AWS Interview Questions at various levels:

✅ Basic, Intermediate, and Advanced.


➡️ Basic and Intermediate AWS Interview questions:
- What is AWS?
- What is EC2?
- What is S3?
- What is IAM?
- What is VPC?
- What is a Security Group?
- What are Availability Zones (AZs)?
- What is the difference between S3 and EBS?
- What is Auto Scaling?
- Explain the difference between Instance Store and EBS.
- What is CloudFront?
- What is the difference between an Elastic Load Balancer (ELB) and a Classic Load Balancer (CLB)?
- What is the use of AWS Lambda?
- What is the difference between a public and private subnet in VPC?
- Explain the difference between RDS and DynamoDB.
- What is an S3 bucket policy?

➡️ Advanced AWS Interview Questions:
- How does AWS CloudFormation work, and how does it help in automation?
- What are the benefits of using AWS Organizations?
- How does Amazon Route 53 work?
- What is AWS Kinesis and how does it differ from AWS Lambda?
- Explain the concept of AWS Elastic Beanstalk.
- What are the different types of EBS volumes and their use cases?
- What is AWS Direct Connect, and how does it work?
- What is the Amazon Elastic File System (EFS) and its use cases?
- What are AWS Trusted Advisor and its key functions?
- Explain the AWS Well Architected Framework.


📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

♾ DevOps Zero to Hero ♾


🖥 AWS Zero to Hero Course
🔠https://lnkd.in/dgZ446me

🖥 DevOps Zero to Hero Course
🔠https://lnkd.in/dbfYhieG

🖥 Terraform Zero to Hero
🔠https://lnkd.in/dafDXUh6

🖥 Docker
🔠https://lnkd.in/dV2myVq6

🖥 Kubernetes
🔠https://lnkd.in/dynrCFVy

🖥 Observability Zero to Hero
🔠https://lnkd.in/dHwdSa4W

🖥 Azure Zero to Hero
🔠https://lnkd.in/d3PCGrrA

🖥 What is CICD ?
🔠https://lnkd.in/d7EN3Ymi

🖥 Jenkins ZERO to HERO
🔠https://lnkd.in/dvPCQ9XZ

🖥 Real-Time Projects for DevOps and Cloud
🔠https://lnkd.in/dtuqFPNQ

🖥 GitOps & Argo CD
🔠https://lnkd.in/dBCpzJ5f

🖥 Python for DevOps
🔠https://lnkd.in/dewqThFz

🖥 Shell Scripting for DevOps
🔠https://lnkd.in/dbXVPbyT

🖥 Ansible Zero to Hero
🔠https://lnkd.in/df_Gnn74

🖥 Real DevOps Podcasts
🔠https://lnkd.in/ds6XAx_S


📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

🚀 Networking is the backbone of DevOps!


As DevOps Engineers, understanding how services communicate across environments is crucial for debugging, securing, and optimizing systems.

Here’s a quick reference list of common network ports that every DevOps and Cloud Engineer should be familiar with — from HTTP and SSH to Kubernetes, Docker, Redis, and Prometheus.

🌝Knowing these ports helps when:
✅ Configuring firewalls and security groups
✅ Troubleshooting connectivity issues
✅ Building secure CI/CD and cloud infrastructures

💡 Solid networking knowledge = stronger DevOps foundation.

📱 𝐅𝐨𝐥𝐥𝐨𝐰 𝐦𝐞 𝐨𝐧 𝐆𝐢𝐭𝐇𝐮𝐛 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐃𝐞𝐯𝐎𝐩𝐬 𝐑𝐞𝐬𝐨𝐮𝐫𝐜𝐞𝐬 : https://github.com/NotHarshhaa

📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

🖥 Kubernetes interview Questions: ❓


❗️ Phase 1: Foundations (Day 1–5)

⚡️Day 1 – Introduction to Kubernetes

1. What is Kubernetes, and why do we use it?
2. Difference between Kubernetes and Docker Swarm?
3. Explain the architecture of Kubernetes (Master vs Worker nodes).
4. What is a Pod in Kubernetes?
5. What is the role of kube-apiserver, kube-scheduler, and etcd?
6. How does Kubernetes provide high availability?
7. What problem does Kubernetes solve compared to running apps directly on VMs?

⚡️Day 2 – Pods

1. What is a Pod in Kubernetes?
2. Can a Pod run multiple containers? If yes, why would you need that?
3. What’s the difference between a Pod and a container?
4. How do you check the logs of a Pod?
5. What happens if a Pod dies?
6. Difference between kubectl apply and kubectl create when creating Pods?
7. What is the difference between a static Pod and a normal Pod?

⚡️Day 3 – ReplicaSets

1. What is a ReplicaSet in Kubernetes?
2. How is a ReplicaSet different from a ReplicationController?
3. If a Pod managed by a ReplicaSet is deleted, what happens?
4. Can we scale a ReplicaSet manually? If yes, how?
5. How does a ReplicaSet ensure high availability?
6. Explain the relationship between ReplicaSet and Deployment.
7. Which object controls Pods directly: Deployment or ReplicaSet?

⚡️Day 4 – Services

1. What is a Service in Kubernetes?
2. Explain the different types of Services (ClusterIP, NodePort, LoadBalancer, ExternalName).
3. Which is the default Service type in Kubernetes?
4. How does a Service communicate with Pods?
5. What is kube-proxy, and what is its role in Services?
6. Difference between ClusterIP and NodePort?
7. How do Services help achieve loose coupling between microservices?

⚡️Day 5 – Deployments

1. What is a Deployment in Kubernetes?
2. Difference between Deployment and ReplicaSet?
3. How do Deployments achieve zero-downtime updates?
4. What is a rolling update strategy in Deployments?
5. How do you rollback a Deployment?
6. What are readiness and liveness probes, and why are they important?
7. How does Deployment ensure fault tolerance?


📱 𝐅𝐨𝐥𝐥𝐨𝐰 𝐦𝐞 𝐨𝐧 𝐆𝐢𝐭𝐇𝐮𝐛 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐃𝐞𝐯𝐎𝐩𝐬 𝐑𝐞𝐬𝐨𝐮𝐫𝐜𝐞𝐬 : https://github.com/NotHarshhaa

📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

🚀 AWS Project 02: WordPress Hosting Architecture using AWS VPC, EC2, RDS & S3 (Intermediate) 🌐

We’re diving deep into real-world AWS architecture! In this project, you’ll build a complete WordPress hosting environment step by step — learning how different AWS services integrate to create a secure, scalable web application.

🧩 What You’ll Build:
- A custom VPC with both public and private subnets
- An EC2 instance hosting a WordPress application
- A MySQL RDS database in a private subnet
- An S3 bucket for storing static website assets

⚙️ Key Skills Covered:
- AWS Networking (VPC, Subnets, Security Groups)
- EC2 Instance Setup & WordPress Installation
- RDS Database Integration
- S3 for Static Content Hosting

🧠 Prerequisites:
- An AWS account with permissions to create IAM roles, VPCs, EC2, and RDS
- Basic knowledge of AWS services

🌍 Goal:
By the end of this project, you’ll have a fully functional WordPress site hosted on AWS — designed using industry best practices for networking, scalability, and security.

📂 Project Repository:
📱 https://github.com/NotHarshhaa/AWS-Projects/tree/master/AWS-Project-01


📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

📱 30 Kubernetes Tutorials

Each one focused on a key concept, tool, or best practice.

1. Kubernetes Architecture - https://lnkd.in/gSB2GyXp
2. High Availability - https://lnkd.in/gzYd97Ee
3. Best Practices (Design & Setup) - https://lnkd.in/gPUx8uNP
4. Minikube - https://lnkd.in/gAgcw2q6
5. Kubeadm - https://lnkd.in/gkCQAajB
6. Kubeconfig File - https://lnkd.in/gEnUdrj7
7. Vagrant VMs - https://lnkd.in/gtKNepyc
8. eksctl - https://lnkd.in/ghUDuDQx
9. kubectl - https://lnkd.in/gzbd7263
10. Kubernetes Cluster - https://lnkd.in/giaAps_S
11. Etcd - https://lnkd.in/g9icGcME
12. Kubernetes Pod - https://lnkd.in/gtGGyJR7
13. Init Containers - https://lnkd.in/gPaDpyUP
14. Daemonset - https://lnkd.in/gAM7pxrK
15. Pod Lifecycle - https://lnkd.in/gtwBJr3w
16. Kubernetes Ingress - https://lnkd.in/gN2RD3ei
17. Nginx Ingress - https://lnkd.in/ghvGtGS3
18. K8s YAML Manifests - https://lnkd.in/gJQ-pPJE
19. Alert Manager - https://lnkd.in/gHM6DnFE
20. EFK Stack - https://lnkd.in/gSC6bj37
21. K8s Logging - https://lnkd.in/g8VG6nti
22. Kustomize - https://lnkd.in/gziADVvS
23. Sealed Secrets - https://lnkd.in/gceD9mpU
24. Docker Image In K8s Pod - https://lnkd.in/g4qUgj4E
25. Jenkins Build Agents - https://lnkd.in/gf9R-qin
26. Kustomize Secret - https://lnkd.in/gW_eugbf
27. Deploy Argo CD - https://lnkd.in/gHUMhS7Q
28. Install Helm for K8s - https://lnkd.in/gn2DHbRz
29. MongoDB - https://lnkd.in/ga8DmNKb
30. Hashicorp Vault - https://lnkd.in/gB7EZYJT


📱 𝐅𝐨𝐥𝐥𝐨𝐰 𝐦𝐞 𝐨𝐧 𝐆𝐢𝐭𝐇𝐮𝐛 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐃𝐞𝐯𝐎𝐩𝐬 𝐑𝐞𝐬𝐨𝐮𝐫𝐜𝐞𝐬 : https://github.com/NotHarshhaa

📱 𝐅𝐨𝐥𝐥𝐨𝐰 @devopsclassroom 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

#️⃣ Must-Know 📱 GitHub Interview Questions ❓

Brush up before your next DevOps/Cloud/Developer interview! 🖥⚙️

1. How does GitHub Actions work and how do you create a custom workflow?

2. What is the difference between git pull and git fetch in a GitHub repo context?

3. How can you resolve a merge conflict in GitHub?

4. Explain the concept of GitHub forks vs. branches.

5. How do you enforce protected branches and what is their purpose?

6. How can you trigger a GitHub Action only when code is pushed to a specific folder?

7. What is the .github directory used for in repositories?

8. How do you use GitHub CLI and what are its real-world benefits?

9. What is the difference between GitHub Projects and GitHub Issues?

10. How do you manage secrets in GitHub Actions securely?

11. What are GitHub Environments and how do they differ from branches?

12. How would you rollback a release deployed via GitHub Actions?

13. How do GitHub Codespaces help in faster development onboarding?

14. What’s the difference between squash merge, rebase, and regular merge on GitHub?

15. How do you set up branch rules for CI/CD pipelines using GitHub Actions?

🔠Hard level:

1. How do you handle secrets rotation dynamically in GitHub Actions without exposing credentials?

2. Explain how matrix builds work in GitHub Actions and when to use them.

3. How do you implement monorepo CI/CD with GitHub Actions while minimizing unnecessary job runs?

4. Describe a secure GitOps workflow using GitHub and ArgoCD.

5. How would you set up end-to-end testing across microservices using GitHub Actions workflows?

6. How do you audit GitHub enterprise repositories for compliance and security best practices?

7. What are the limitations of GitHub Actions compared to other CI/CD tools like GitLab or Jenkins?

8. How can you customize self-hosted GitHub Action runners and manage their scale?

9. Describe a real-world use case for composite actions and how you version them.

10. How do you prevent secret leakage during pull request builds in public GitHub repositories?

11. How can you manage cross-repo dependencies and coordinated releases using GitHub Workflows?

12. What’s the best way to handle rollback strategies in GitHub-based CD pipelines?

13. How do you integrate OPA/Gatekeeper or policy-as-code tools in GitHub Actions?

14. How can GitHub’s GraphQL API help in automating repo health checks and metrics?

15. How do you perform static code analysis + security scans (like SAST/Dependency Review) automatically on every PR?


📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

🔝 20 DevOps and Cloud use cases

⚡️Here are 20 handpicked interesting ones.

1) AWS Architecture to Overcome API Gateway Pay Load Limit
🔠https://lnkd.in/gDzJiv3b

2) Kubernetes Pod Disruption Budget Practical Guide
🔠https://lnkd.in/gNZNxewk

3) How Provisioned Concurrency Cuts AWS Lambda Cold Starts by 98%
🔠https://lnkd.in/gkjzhEsv

4) How to Reduce Docker Image Size
🔠https://lnkd.in/gFzjeCXu

5) Multi Cloud GitOps Workflow for Kubernetes Management
🔠https://lnkd.in/gUGNMk2T

6) GitHub Actions Workflow for Terraform workspaces
🔠https://lnkd.in/gY4eQtwS

7) How To Convert Existing Cloud Infrastructure To Terraform
🔠https://lnkd.in/gSX6R7fK

8) Kubernetes Node Not Ready - How To Fix It
🔠https://lnkd.in/gksPqZYF

9) How One BigQuery Query Costs Shopify $1M a Month
🔠https://lnkd.in/gRRfYtXc

10) How AWS Handled 2024 Prime Day’s Record Breaking Traffic
🔠https://lnkd.in/g9RQ2fVc

11) Hidden Risk Of Relying On Labels In Kubernetes Security
🔠https://lnkd.in/gahmCwBB

12) Detecting and Mitigating Image Vulnerabilities with Docker Scout
🔠https://lnkd.in/gM4-wdCV

13) Security Researcher Exposed AWS Keys and API Secrets of $1B VC Firm in 5 Clicks
🔠https://lnkd.in/g_cmgR7D

14) Guide to a Well Structured Terraform Project
🔠https://lnkd.in/gZtsrsFu

15) Cloud Disaster Recovery Strategies
🔠https://lnkd.in/gTgjkNm9

16) Why should a container have only one process?
🔠https://lnkd.in/gKqD4GTf

17) AWS VPC Gateway Endpoints - The Most Underrated Cost Savers
🔠https://lnkd.in/g7-CUNfZ

18) The Problem With Overusing Terraform Dynamic Blocks
🔠https://lnkd.in/g7za-55Z

19) How Levels. fyi Cuts Cloud Bill By 15%
🔠https://lnkd.in/gVNwFnxB

20) Kubernetes Air Gap Implementation
🔠https://lnkd.in/gxxqWdEE


📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

🚀 10 Advanced Terraform Interview Questions & Answers
🔧 For DevOps Engineers | Boost your Terraform game! 💥


Q1: Preventing accidental resource deletion?
✅ Use lifecycle { prevent_destroy = true }
✅ Run terraform plan before apply
✅ Implement strict access controls

Q2: Handling API rate limiting?
🔁 Use exponential backoff
🕒 Add time_sleep between ops
📦 Split deployments into smaller batches

Q3: Recovering from a corrupted state file?
🛠 Restore from backup
📥 Use terraform import
📂 Enable versioning on remote state storage

Q4: Backend migration?
📤 terraform state pull → update backend → terraform init -migrate-state
🛑 Schedule during maintenance with backups

Q5: Handling state drift in prod?
🔄 Regular terraform plan in CI/CD
⚠️ Automate drift detection + alerts
🔧 Reconcile with terraform import

Q6: Secrets management?
🔐 Use Vault / AWS Secrets Manager
👀 sensitive = true
🔒 Encrypt remote state at rest

Q7: Zero-downtime infra updates?
🧱 create_before_destroy
🟢 Blue-green deployments
📊 Gradual traffic shifting + health checks

Q8: Structuring modules for enterprise?
📦 Reusable modules with clear interfaces
📌 Version constraints
🔗 Remote state for dependency management

Q9: Large-scale refactoring strategy?
🔀 Use terraform state mv
🎯 Targeted applies
✅ Split into safe, tested PRs

Q10: Terraform testing best practices?
🧪 Static analysis: tflint, checkov
🧱 Unit tests: Terratest
🧹 Ephemeral envs with cleanup

💡 Save & Share to prep like a pro!
#Terraform #DevOps #InterviewReady #IaC


📱 Follow me on GitHub for more DevOps/Cloud Free Resources:
➡️ https://github.com/NotHarshhaa

📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

✅ 𝗬𝗼𝘂 𝗱𝗼𝗻’𝘁 𝗻𝗲𝗲𝗱 𝘁𝗼 𝗹𝗲𝗮𝗿𝗻 𝗮𝗹𝗹 𝟮𝟬𝟬 𝗔𝗪𝗦 𝘀𝗲𝗿𝘃𝗶𝗰𝗲𝘀.

Every cloud engineer starts out thinking they do.
Then they realise… the real secret is mastering the 𝑐𝑜𝑟𝑒 ones that power everything else.

Start small. Build strong. 🏆

✔️ Focus on:
EC2, Lambda, S3, RDS, VPC, IAM, CloudWatch

Once you understand how these connect, the rest of AWS suddenly makes sense.

You don’t need to know it all, just enough to build confidently.


📱 𝐅𝐨𝐥𝐥𝐨𝐰 𝐦𝐞 𝐨𝐧 𝐆𝐢𝐭𝐇𝐮𝐛 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐃𝐞𝐯𝐎𝐩𝐬 𝐑𝐞𝐬𝐨𝐮𝐫𝐜𝐞𝐬 : https://github.com/NotHarshhaa

📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

🐧 49 Linux Commands Every DevOps Engineer Should Have in Their Back Pocket


➡️System Intelligence:
• htop - Like top, but actually useful
• df -h - Because disk space issues find you
• netstat -tulpn - Your network's story
• lsof - What's using that port?
• ps aux | grep - Finding that runaway process
• dmesg - Kernel's gossip channel

➡️File Operations:
• find . -name - Your file search superhero
• tar -xvf - Unzip like a pro
• rsync - scp's smarter cousin
• sed -i - Stream editing wizard
• awk - Text manipulation magic
• grep -r - Find text like a detective

➡️Container Life:
• docker stats - Container vital signs
• docker logs -f - Live container stories
• crictl pods - Kubernetes container whisperer
• kubectl get pods - K8s status check

➡️Monitoring Magic:
• tail -f - Log watching party
• watch - Command on repeat
• vmstat - Memory tales
• iostat - Disk performance poetry

➡️Network Ninja:
• curl -v - HTTP storyteller
• nc - Network swiss army knife
• dig - DNS detective
• ss - Socket statistics

➡️Security Stuff:
• chmod - Permission painter
• chown - Ownership wizard
• openssl - Certificate craftsman
• ssh-keygen - Key creator

➡️Process Control:
• systemctl - Service sorcery
• journalctl - Log time machine
• kill -9 - Process terminator
• nice - Priority painter

➡️Performance Profiling:
• strace - System call spy
• tcpdump - Network packet poet
• sar - System activity reporter
• perf - Performance profiler

➡️Text Wrangling:
• cut -d - Column collector
• sort | uniq -c - Pattern finder
• tr - Character changer
• wc -l - Line counter

➡️File System:
• du -sh - Directory size detective
• fdisk -l - Disk detective
• mount - filesystem connector
• ln -s - Symlink sorcerer

➡️Shell Shortcuts:
• history | grep - Command time machine
• !! - Last command replay
• ctrl+r - Reverse search magic
• alias - Command shortcut creator

➡️Miscellaneous Mastery:
• tee - Output splitter
• xargs - Command multiplier
• at - Job scheduler
• screen/tmux - Terminal multiplexer


📱 𝗙𝗼𝗹𝗹𝗼𝘄 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

⚪ The simplest way to remember Kubernetes Networking

Break it into 4 layers

➡️ Layer 1 : understand CoreDNS and how it resolves service names and how it returns ClusterIP of the service

➡️ Layer 2 : understand how do you reach the service with kube-proxy and know how the traffic is routed from ClusterIP to backend pods

➡️ Layer 3 : time to understand how pods talk to each other with the help of CNI and how the networks bridges are getting formed

➡️ Layer 4 : how will the world connect to your service and understand how external access is provided with components like NodePorts, LBs and Ingress

Individually there are 4 kubernetes components that you need to learn and implement.

🟠 CoreDNS
🟠 kube-proxy
🟠 CNI Plugin
🟠 Ingress/ LB's


👍👍👍👍 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs