DevOps is one of the fastest-growing and most in-demand skills in the IT world 🌍, especially for beginners and cloud engineers 🚀. After learning DevOps tools ⚙️ and working on practical projects 💡, I recently attended two DevOps job interviews 🎯. In this blog, I’m excited to share my real interview experience 📘, including the questions asked ❓, the topics covered 📌, and the key areas interviewers focused on 👀. My goal is to help beginners understand the real interview environment 💼, build confidence 💪, and get a clear idea of what companies truly expect from DevOps candidates 🌟.
📝 Note:
All the interview answers shared in this blog are based on my own experience and the responses I gave during my interviews. If you feel any answer needs correction or improvement, please update it as per your understanding. The purpose of this blog is to share real DevOps interview-learning experiences, not to claim that every answer is perfect. 😊
🟢 Interview Question 1: “Tell me about yourself.”
Answer I Gave :-
“Good morning/afternoon, and thank you for giving me this opportunity to introduce myself.
My name is Gujjar Apurv, and I am a final-year BE student in Electronics and Communication Engineering. Over the past two years, I have been actively learning and practicing DevOps and Cloud technologies with strong hands-on experience. To validate my technical skills, I appeared for and successfully cleared the AWS Associate Developer certification exam, which has strengthened my foundation in cloud concepts and AWS services.
Recently, I was completed a Cloud Internship as a Cloud Intern at Corextech IT Services, where I gained practical experience with AWS services such as EC2, VPC, IAM, RDS, Route 53, AWS Lambda, S3, and many more. During this internship, I assisted in the deployment and monitoring of cloud-based systems. Based on my performance, the company assigned me an additional one-month responsibility to work on their live projects.
I have worked on multiple hands-on projects, although I have highlighted only two major ones in my resume.
The first project is the Netflix Clone Project, where I built a complete CI/CD pipeline using Jenkins, Docker, GitHub Actions, monitoring tools, and security integrations. I also implemented DevSecOps practices with live monitoring.
The second project is an AWS Three-Tier Secure Application, where I designed a scalable architecture using EC2, VPC, Subnets, RDS, Route Tables, ALB, and various other AWS components.
Along with technical work, I have also written technical blogs to explain my projects and tools, which helped me demonstrate my technical understanding and documentation skills.
These experiences have helped me build confidence in automation, deployment, cloud monitoring, Linux server handling, and scripting skills that are essential in the DevOps industry.
Thank you.”
🟢 Interview Question 2: “Why did you choose DevOps, and what is DevOps?”
“I chose DevOps because I enjoy automation, cloud technologies, and improving system efficiency. DevOps matches my problem-solving mindset and gives me the opportunity to work end-to-end building faster, scalable, and reliable environments.”
“DevOps is a set of practices that helps teams build and deploy software faster using automation. It reduces errors, improves delivery speed, and enhances collaboration between development and operations teams.”
🟢 Interview Question 3: “Give one DevOps example which is related to the industry.”
“For example, when a developer pushes code to GitHub, a CI/CD pipeline automatically builds, tests, and deploys the application to the server. This removes manual steps, reduces errors, and speeds up software delivery.
🟢 Interview Question 4: “What is your strength and weakness?”
Answer I Gave:
✅ Strength:
“My strength is that I am a quick learner and I adapt to new technologies faster.
⚠️ Weakness:
“My weakness is that I am detail-oriented, and sometimes I over-polish my work.
🟢 Interview Question 5: “What is Cloud vs Cloud Computing?”
Answer I Gave:
☁️ Cloud:
“The cloud is a platform that stores and analyzes data over the internet instead of using a local system.”
💻 Cloud Computing:
“Cloud computing provides the delivery of computing resources like servers, storage, databases, and networking over the internet, without managing physical hardware.”
🟢 Interview Question 6: “Types of Cloud?”
Answer I Gave:
Public Cloud: Open for all users publicly over the internet.
Example: AWS, Azure, Google Cloud
Private Cloud: Not publicly accessible; used by a specific organization.
Example: VMware, OpenStack
Hybrid Cloud: A combination of public and private cloud models.
Example: AWS + VMware integration
🟢 Interview Question 7:(common for both interview )
“What are Cloud Service Models, and how do they compare with AWS services?”**
Answer I Gave:
Cloud services are divided into three main models:
1️⃣ IaaS – Infrastructure as a Service
Provides virtual infrastructure like servers, storage, and networking resources.
AWS Examples:
EC2 (Compute)
EBS (Storage)
S3 (Object Storage)
VPC (Networking)
ELB (Load Balancing)
2️⃣ PaaS – Platform as a Service
Provides a platform to build, run, and manage applications without managing infrastructure.
AWS Examples:
3️⃣ SaaS – Software as a Service
Provides ready-to-use software or tools on the cloud.
AWS Examples:
CloudWatch (Monitoring Tool)
Amazon WorkMail (Email Service)
AWS Chime (Communication Service)
🟢 Interview Question 8: -“What protocols do you know in cloud networking?”
Answer I Gave:
I mentioned the basic cloud networking protocols and explained each in one line with examples:
1️⃣ HTTP / HTTPS
Used for web communication between client and server.
Example: Accessing websites or APIs through browsers.
2️⃣ SMTP
Used for sending emails over the internet.
Example: Email delivery systems and notification services.
3️⃣ DNS
Used to translate domain names into IP addresses.
Example: Creating DNS records on Route 53.
4️⃣ TCP / UDP
Transport layer protocols used for sending data packets between devices.
Example: SSH uses TCP; streaming uses UDP.
5️⃣ POP3 (Post Office Protocol version 3)
Used to receive emails from a mail server.
Example: Inbox downloading in email clients.
🟢 Interview Question 9:- “How will you host a website on AWS? Explain for both static and dynamic websites.
Answer I Gave:
I asked whether the website is static or dynamic. The interviewer said both, so I explained each case separately:
1️⃣ Static Website Hosting on AWS
For a static website, I would:
Use S3 to store static files like HTML, CSS, JS.
Enable Static Website Hosting in S3.
Use CloudFront CDN for caching and global delivery.
Use Route 53 for DNS mapping to a domain name.
👉 Result: Fast, secure, scalable static website hosting.
2️⃣ Dynamic Website Hosting on AWS
For a dynamic website, I would:
Use EC2 instance to run the backend application.
Use Load Balancer (ALB/ELB) to distribute traffic.
Use Auto Scaling Group to handle traffic load.
Use RDS database for storage.
Use VPC for secure networking.
Use Route 53 to map the domain.
👉 Result: Highly available, secure and scalable dynamic website architecture.
🟢 Interview Question 10: (IMP)
“Difference Between static and dynamic hosting, why is it needed, and how does it work?”
Answer I Gave:
I explained that DNS is used in both static and dynamic hosting, because in both cases users access the website through a domain name, and DNS maps that domain to the correct server or endpoint.
Static website hosting serves fixed content directly from S3 via CloudFront, and DNS points to the CloudFront distribution.
Dynamic website hosting generates real-time content using EC2 (behind ALB) with a database like RDS, and DNS points to the ALB.
📌 Why DNS is needed?
DNS converts a domain name into an IP address or endpoint URL so browsers can locate the server or hosting resource.
📌 Type of DNS Records I Mentioned:
1️⃣ A Record (Address Record)
Maps a domain to an IP address.
In static hosting → rarely needed, unless pointing to CloudFront IP via LB.
In dynamic hosting → points to EC2 or Load Balancer IP.
Example:
example.com → 54.xx.xx.xx (EC2 public IP / LB IP)
2️⃣ CNAME (Canonical Name Record)
Maps one domain name to another domain name.
Used for endpoints instead of IP.
Example:
www.example.com → xyz.cloudfront.net
app.example.com → loadbalancer.aws.com
📌 Step-by-Step DNS Workflow I Explained:
1️⃣ User types domain name in browser
2️⃣ DNS checks domain record
3️⃣ If A Record → returns server IP
4️⃣ If CNAME → returns mapped domain → then endpoint resolves to IP
5️⃣ Browser connects to that IP
6️⃣ Website loads from static bucket / LB / EC2
🟢 Interview Question 11:
“If you have one EC2 instance running a website, can you host it using S3 or Route 53? If yes, how? What IP and record type will you assign?”
Answer I Gave:
“Yes, a website running on a single EC2 instance can be hosted using Route 53. Since it is a dynamic website, I will assign an Elastic IP to the EC2 instance and create an A record in Route 53 pointing the domain to that Elastic IP. S3 is not required because EC2 is directly serving the application.”
🟢 Interview Question 12:
“How do you create an EC2 instance? What are inbound/outbound rules? Can you launch multiple EC2s at once?”
Answer I Gave:
✔️ How to create EC2:
“Select AMI → select instance type → configure storage & network → add security group rules → launch → SSH connect.”
✔️ Inbound Rules:
“Allow traffic coming into EC2, like HTTP (80), HTTPS (443), SSH (22).”
✔️ Outbound Rules:
“Allow traffic going out from EC2, usually open to all by default.”
✔️ Multiple EC2 instances:
“Yes, we can launch multiple instances together by increasing instance count during launch or using Auto Scaling.”
🟢 Interview Question 13:
“What is VPC?”
Short Answer I Gave:-
“VPC stands for Virtual Private Cloud, and it is used as a secure and isolated network in AWS.”
🟢 Interview Question 14:
“How did you implement your 3-tier architecture project?”
Short Answer I Gave:
“First, I created a custom VPC. Then I created one public and two private subnets. After that, I attached an Internet Gateway for public access and configured a NAT Gateway for private subnet outbound access. Next, I configured route tables for public and private subnets. Then I launched EC2 instances for the web tier in the public subnet and app and database tiers in private subnets. Finally, I configured security groups to allow only required communication between the tiers.”
🟢 Interview Question 15:
“If your server gets millions of traffic, how will you handle it?”
Short Answer I Gave:
“To handle high traffic, I will use a Load Balancer to distribute requests across multiple servers. If the application needs more scalability and fault tolerance, I can migrate to Kubernetes, which automatically manages scaling, load distribution, and high availability.”
🟢 Interview Question 16:
“Which subnets use inbound and outbound rules, and what are inbound and outbound rules?”
Short Answer I Gave:-
Inbound Rules:
“Allow traffic coming into the instance like HTTP (80), HTTPS (443), SSH (22).”
Outbound Rules:
“Allow traffic going out from the instance usually open for internet access or updates.”
Subnet Preference:
“Public subnets allow inbound internet traffic; private subnets allow inbound only from internal networks.”
🟢 Interview Question 17:
“You have 1 VPC with 3 subnets (Subnet-1 Public, Subnet-2 Private, Subnet-3 Private). Subnet-1 has 3 EC2 instances and other subnets have 1 EC2 each. If you want EC2s inside the public subnet to communicate with each other, will you use Internet Gateway? If yes/no, why? And how will subnet communication happen?”
Answer I Gave:
✔️ Communication inside same subnet:
“No, Internet Gateway is not required because instances in the same subnet can communicate with each other privately using internal IPs.”
✔️ Communication between different subnets:
“To communicate across Subnet-1, Subnet-2, and Subnet-3, I will use the same VPC routing. All subnets inside a VPC are already connected by default, so instances can communicate using private IPs without Internet Gateway.”
✔️ Why Internet Gateway is not needed:
“Internet Gateway is only needed for public internet access, not for internal VPC communication.”
✔️ How Subnet-1 will communicate with Subnet-2 & Subnet-3:
“Since all subnets are in the same VPC, VPC routing table already allows internal communication. So EC2s can talk to each other using private IPs. No VPC peering or Internet Gateway is required.”
🟢 Interview Question 18:
“If each subnet is in a different VPC, how will you make EC2 instances communicate with each other?”
Short Answer I Gave:
“If each subnet is in a different VPC, I will use VPC Peering or Transit Gateway, then update route tables and security groups so EC2 instances can communicate privately without using the Internet Gateway.”
🟢 Interview Question 19:
“In VPC communication, do we use Internet Gateway or NAT Gateway for communication? Why not? And why do we use VPC Peering or Transit Gateway instead?”
Short Answer I Gave:
We don’t use Internet Gateway or NAT Gateway for VPC-to-VPC communication, because they are used for internet access, not internal private communication.
For connecting VPCs, we use VPC Peering or Transit Gateway because they allow private, secure communication between VPC networks.
🟢 Interview Question 20:
“What is internet access in EC2, why do we assign a public subnet, is EC2 public by default, and how do you access it?”
Answer I Gave:
✔️ What is internet access in EC2?
“Internet access means the EC2 instance can send and receive traffic from the internet using a public IP and Internet Gateway.”
✔️ Why do we assign a public subnet?
“To give EC2 internet access through the Internet Gateway. Public subnet allows the instance to be reachable from the outside network.”
✔️ Is EC2 public by default?
“No. EC2 becomes public only if:
✔️ How do we access EC2?
“We can access EC2 using SSH with a public IP and key pair, or through EC2 Instance Connect from the AWS console.”
🟢 Interview Question 21:
“What is a Region in AWS? Explain with example. What is an Availability Zone?”
Answer I Gave:
✔️ What is Region in AWS?
“A Region is a physical geographical location where AWS data centers are hosted.”
Example:
✔️ What is Availability Zone (AZ)?
“AZ is a group of isolated data centers inside a region that work together to provide high availability.”
Example:
🟢 Interview Question 22:
“What is an IAM Role and how do you use it?”
Answer I Gave:
What is IAM Role?
“An IAM Role gives permission to AWS services or users without needing access keys.”
How to use it?
“Attach the role to EC2, Lambda, or any service to allow secure resource access.”
🟢 Interview Question 23:-
“Which AWS service works in a serverless model?”
Answer I Gave:
“AWS Lambda is a serverless compute service that runs code without managing servers. You only upload code, and Lambda handles scaling automatically.”
✅ Linux Commands for DevOps – Quick Reference Table
| Command | Use Case (Short Description) |
| ls | Show list of files & folders |
| cd | Change directory |
| pwd | Show current directory path |
| cp | Copy files/folders |
| mv | Move or rename files/folders |
| rm -rf | Delete files or folders |
| find | Search files by name |
| grep | Search text inside files |
| chmod | Change file permissions |
| chown | Change file ownership |
| df -h | Check disk storage usage |
| du -sh | Check folder size |
| top | View live CPU + memory usage |
| free -h | Check RAM usage |
| ps -ef | Check running processes |
| kill -9 PID | Stop/kill stuck process |
| tail -f | Read live logs |
| ping IP/Domain | Test network connectivity |
| netstat -tulnp | Check open ports |
| ss -tulnp | Check listening ports |
| yum install pkg | Install package (RHEL/CentOS) |
| apt install pkg | Install package (Ubuntu/Debian) |
| scp | Secure file transfer |
| curl / wget | Download files |
| tar -cvf | Compress archive |
| tar -xvf | Extract archive |
| systemctl start/stop/restart | Manage services |
| ssh -i key.pem user@ip | Connect to remote server |
| uname -a | Show kernel details |
| hostnamectl | Show hostname info |
| ip a / ifconfig | Show IP details |
| history | Show executed commands |
| whoami | Show current user |
🟢 Interview Question 24:
“What is the difference between Virtual Machines and Docker?”
Answer I Gave:
| VM | Docker |
| Heavy | Lightweight |
| Full OS required | Shares host OS |
| Slow startup | Fast startup |
| High resources used | Low resources used |
| Strong isolation | Process-level isolation |
Short Answer:
“VMs are heavy and slow because they run full OS; Docker is fast and lightweight because it uses containers and shares the host OS.”
🟢 Interview Question 25:
“What is Docker and why do we use it?”
Answer I Gave:
“Docker is a tool used to create, run, and manage containers for applications. It helps applications run faster, improves portability, and makes deployment easy.”
🟢 Interview Question 26:
“What is a Docker Image and what is a Docker Container?”
Answer I Gave:
| Docker Image | Docker Container |
| Blueprint/template of application | Running instance of the image |
| Read-only | Live, executable environment |
| Stored in registry | Runs on host machine |
Short Answer:
“A Docker image is a blueprint, and a container is the running instance created from that image.”
🟢 Interview Question 27:
“If Docker is available, why do we use Kubernetes? What is the difference?”
Answer I Gave:
Docker:
“Docker is used to create and run containers.”
Kubernetes:
“Kubernetes is used to manage and scale containers automatically across multiple servers.”
Short Difference:
“Docker runs containers. Kubernetes manages many containers.”
🟢 Interview Question 28:
“What is a Dockerfile? Give example and build command.”
Answer I Gave:
“A Dockerfile is a script that contains instructions to build a Docker image automatically.”
Example Dockerfile:
FROM python:3.9
COPY app.py .
CMD ["python", "app.py"]
Build Command:
docker build -t app .
app is the image name
🟢 One Line Logic:
“Dockerfile creates the image, and Docker Compose runs the image.”
🟢 Interview Question 29:
“What is Docker Compose and how does it work? Give example.”
Answer I Gave:
“Docker Compose is a tool used to run multiple containers together using a single YAML file. It helps manage multi-container applications easily.”
📌 How it works:
docker-compose.yml:
version: '3'
services:
web:
image: nginx
ports:
- "80:80"
📌 Command:
docker-compose up -d
🟢 Interview Question 30 : -
“If your system gets millions of traffic and you don’t want to manage EC2 manually, what will you use?”
Answer I Gave:
“I will use Kubernetes because it automatically handles scaling, deployment, traffic distribution, self-healing, and node management. It creates and manages containers without manually launching EC2 instances.”
🟢 Interview Question 31:
“What is Kubernetes?”
Answer I Gave:
“Kubernetes is a container orchestration tool that automates deployment, scaling, and management of containerized applications.”
🟢 Interview Question 32:
“What are Pod, Deployment, and Service in Kubernetes?”
Answer I Gave:
✔️ Pod:
“Pod is the smallest unit in Kubernetes that runs one or more containers.”
✔️ Deployment:
“Deployment manages multiple Pods and enables easy updates, scaling, and rollback.”
✔️ Service:
“Service exposes Pods to the network so applications can communicate internally or externally.”
🟢 Interview Question 33:
“First, when a developer pushes code to GitHub, it triggers the CI pipeline.
The pipeline pulls the code and automatically builds the application using GitHub Actions or Jenkins.
Next, SonarQube performs static code analysis to check code quality and security issues.
After that, a Docker image is built and pushed to the container registry.
Then, Trivy scans the Docker image to identify security vulnerabilities.
For monitoring, Prometheus collects metrics and Grafana provides visual dashboards.
Finally, the container image is deployed to the production environment.”
✔️ Summary:
“In my Netflix clone CI/CD project, code went from GitHub → Jenkins/GitHub Actions → SonarQube → Docker → Trivy → Monitoring → Deployment.”
🟢 Interview Question 34:
“If you use a public IP to access a server, how is it secure? Anyone can access it, right?”
Answer I Gave:
“Public IP is safe because access depends on security group rules + SSH keys, not on IP alone.”
🟢 Interview Question 35:
“Give one combined real scenario where monitoring and security tools work together.”
Answer I Gave:
“In my Netflix clone deployment, I used Prometheus and Grafana to monitor container performance like CPU, RAM, latency, and traffic load. SonarQube was used for code scanning, and Docker images were scanned with Trivy for vulnerabilities. If any issue occurs, Prometheus alerts trigger notifications. This setup helped maintain application health, performance, and security continuously all in one workflow.”
🟢 Interview Question 36:
“What is CI/CD, and how does Jenkins help? Also, what is the difference between Jenkins and GitHub Actions?”
Answer I Gave:
✔️ What is CI?
“CI (Continuous Integration) means automatically building and testing code whenever developers push changes.”
✔️ What is CD?
“CD (Continuous Deployment/Delivery) means automatically deploying applications to servers or containers after testing.”
✔️ How Jenkins helps?
“CI/CD automates build, test, and deployment. Jenkins is the tool to do it. GitHub Actions is a simpler, cloud-based CI/CD alternative.”
🟢 Interview Question 37:
“What is Git and what is GitHub?”
Answer I Gave:
✔️ Git:
“Git is a version control system used to track and manage source code changes.”
✔️ GitHub:
“GitHub is a cloud platform used to store Git repositories and collaborate with others online.”
🟢 Interview Question 38:
“Explain the Git workflow from git init to pull request.”
Answer I Gave:
✔️ 1️⃣ git init
Start a new local repository.
✔️ 2️⃣ git add .
Add files to staging.
✔️ 3️⃣ git commit -m “msg”
Save changes in local repo.
✔️ 4️⃣ git branch -M main
Set main branch name.
✔️ 5️⃣ git remote add origin <URL>
Connect local repo to GitHub.
✔️ 6️⃣ git push -u origin main
Upload code to GitHub.
✔️ 7️⃣ Create new branch
Work on new feature.
✔️ 8️⃣ git push (new branch)
Push branch to GitHub.
✔️ 9️⃣ Create Pull Request
Compare branch → merge → review.
Short path :-
“init → add → commit → push → branch → pull request → merge.”
Interview Question 39:
“What is Shell Scripting, and why is it used in DevOps?”
Answer I Gave:
“Shell scripting automates Linux tasks using command sequences. In DevOps, it is used for automation, deployments, monitoring, log management, and server tasks.”
Interview Question 40:
“What is Shebang (#!) in shell script?”
Answer I Gave:
“Shebang tells Linux which interpreter should run the script, such as ‘#!/bin/bash’.”
Interview Question 41:
“How do you make a script executable?”
Answer I Gave:
“By using: chmod +x script.sh”
Interview Question 42:
“How do you run a shell script?”
Answer I Gave:
“By executing: ./script.sh”
Interview Question 43:
“Real scenario: If a service stops working, how will you restart it using shell script?”
Answer I Gave:
“I will automate it using systemctl commands inside a shell script to restart the service automatically if it fails.”
Interview Question 44:
“How do you search for errors inside a log file using shell script?”
Answer I Gave:
“I will use grep inside a shell script to filter error lines e.g., grep ‘ERROR’ app.log.”
Interview Question 45:
“How do you schedule a shell script automatically?”
Answer I Gave:
“I will use cron jobs by running: crontab -e”
Interview Question 46:
“Give one real DevOps example of Shell Script.”
Answer I Gave:
“I used shell script to automate backup using tar, which removed manual effort.
Interview Question 47:
“Why is Python used in DevOps?”
Answer I Gave:
“Python is used for automation, cloud scripting, API integration, data parsing, monitoring, and CI/CD workflows.”
Interview Question 48:
“Do you know Python scripting?”
Answer I Gave:
“Yes, I know basic Python and can write automation scripts if needed.”
Interview Question 49:
“Give one real example of Python automation in DevOps.”
Answer I Gave:
“I used Python to collect CPU and memory usage metrics automatically and send alerts.”
Interview Question 50:
“What is pip?”
Answer I Gave:
“pip is a Python package installer used to install libraries and modules.”
Interview Question 51:
“How do you automate AWS services using Python?”
Answer I Gave:
“I will use Python with boto3 library to create, manage, and automate AWS cloud operations.”
Interview Question 52:
“Shell scripting vs Python scripting in DevOps?”
Answer I Gave:
“Shell scripting is best for OS tasks, while Python is best for cloud automation, APIs, and data handling.”
Interview Question 53:
“How will you scan logs and extract errors using Python?”
Answer I Gave:
“I will loop through log file lines in Python and print the lines containing the keyword ‘ERROR’.”
Q1: Hard link vs Soft link?
Hard link = real file copy; Soft link = shortcut link.
Q2: Find top 10 biggest files?
du -ah / | sort -rh | head -n 10
Q3: Check which port is in use?
lsof -i :80
Q4: Check live disk I/O?
iotop
Q5: Check failed login attempts?
cat /var/log/secure
Q6: SSH not working — how to access server?
Use AWS Console or Session Manager.
Q7: High server load — first check?
Check CPU with top.
Q8: Find zombie processes?
ps aux | grep Z
Q9: Check highest CPU usage process?
top -o %CPU
Q10: Trace network packets?
tcpdump
🟢 ADVANCED DOCKER / K8s
Q11: What is overlay network?
Allows containers to talk across multiple hosts.
Q12: How Kubernetes auto-scales?
Using Horizontal Pod Autoscaler.
Q13: Liveness vs Readiness probe?
Liveness = container running; Readiness = ready for traffic.
Q14: What if Kubernetes master fails?
Cluster control breaks — need HA setup.
Q15: Why etcd used?
Stores Kubernetes cluster data.
🟢 ADVANCED CI/CD
Q16: Canary deployment?
Release to small users first, then full rollout.
Q17: Handle secrets in pipeline?
Use Secrets Manager or Vault.
Q18: What is an artifact?
Build output like Docker image or JAR.
Q19: How to rollback deployment?
Deploy the previous version again.
Q20: Trigger pipeline automatically?
Using webhook.
🟢 AWS SCENARIO
Q21: Public IP changes after reboot fix?
Use Elastic IP.
Q22: How is S3 secure?
Bucket policy + IAM + encryption.
Q23: RDS high load fix?
Add read replicas.
Q24: AWS cost increasing check how?
Use Cost Explorer.
🟢 NETWORKING
Q25: Website slow first check?
Ping to test response.
🟢 HR STYLE DEVOPS
Q26: Deployment fails at night what will you do?
Check logs, rollback safely, fix later.
Q27: Why DevOps?
For fast delivery and less manual work.
Q28: Your weakness?
Pay extra attention to details.
Q29: Deadline is close what will you do?
Focus on priority tasks.
🟢 ADVANCED LINUX COMMANDS
Q30: htop use?
Live process view.
Q31: nmap use?
Network scan.
Q32: ncdu use?
Disk usage view.
Q33: strace use?
System call trace.
Q34: journalctl use?
System logs.
Q35: dig use?
DNS check.
Q36: rsync use?
File sync.
Q37: uptime use?
System load.
Q38: crontab -l use?
List cron jobs.
🟢 ADVANCED DEVOPS / CLOUD CORE
Q39: What is Kernel Panic?
Fatal OS crash.
Q40: What is inode?
File metadata record.
Q41: /etc/passwd vs /etc/shadow?
passwd = users; shadow = passwords.
Q42: What is SELinux?
Security policy layer.
Q43: What is race condition?
Two processes accessing data same time → conflict.
Q44: Ephemeral storage?
Temporary storage for pods.
Q45: Pod Disruption Budget?
Stops too many pods from going offline.
Q46: Container Registry?
Stores container images.
Q47: What is throttling?
Performance reduced due to limits.
Q48: Cache invalidation?
Remove stale cache data.
Q49: Sticky session LB?
Same server for same user.
Q50: Infrastructure drift?
Infra state mismatch with IaC code.
🟢 Conclusion ✨
Preparing for a DevOps interview can feel challenging, especially for freshers but the journey becomes easier when we learn from real experiences instead of memorizing theory. In this blog, I shared every question that was asked in my two DevOps interviews, along with simple and practical answers so that anyone who is preparing can understand what companies actually expect.
From AWS, Linux, Networking, Docker, Kubernetes, and CI/CD pipelines to scenario-based cloud solutions these real interview learnings will save you time, build confidence, and help you prepare smarter.
💡 The purpose of this blog was not just to share answers,
but to show the process, mindset, and direction that a DevOps candidate should follow.
If you are a fresher like me, remember one thing:
You do not need to know everything.
You just need to:
✔️ Understand concepts
✔️ Build projects
✔️ Stay consistent
✔️ Keep learning
✔️ Believe in yourself
DevOps is not just about tools
It is about problem-solving, automation, teamwork, and continuous improvement.
Thank you for reading this blog.
I hope it helps you prepare better, feel confident, and move one step closer to your DevOps career.
🚀 If I can do it, you can do it too.
All the best, future DevOps engineers! 🔥
👨💻 About the Author
“This series isn’t just about tools it’s about mastering real DevOps concepts and interview-ready knowledge.”
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