I recently my friend attended an interview for a DevOps Engineer role, and I wanted to share some of the key questions asked. If you’re preparing for DevOps interviews, these might help!
💡 These were some of the real interview questions that one of my friend faced! If you’re preparing for a DevOps, AWS, or Kubernetes role, I hope this helps.
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DevOps & Cloud (AWS, AZURE, GCP) Tech Free Learning
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1. What is AWS?
2. What are the key services provided by AWS?
3. What is EC2 in AWS?
4. What is an S3 bucket?
5. Explain the difference between S3 and EBS.
6. What is IAM in AWS?
7. How does AWS VPC work?
8. What are Security Groups and how do they work?
9. What is an AWS region?
10. What are Availability Zones in AWS?
11. What is Auto Scaling?
12. What is Elastic Load Balancing?
13. What is Route 53?
14. Explain the difference between a public and private subnet.
15. What is CloudFormation?
16. What is AWS Lambda?
17. What is Amazon RDS?
18. How do you monitor AWS resources?
19. What is Amazon DynamoDB?
20. What is AWS Elastic Beanstalk?
21. What is Amazon CloudFront?
22. Explain Amazon SNS.
23. What is the difference between RDS and DynamoDB?
24. What are EIPs (Elastic IPs)?
25. How does AWS CloudTrail work?
26. What is Amazon CloudWatch?
27. What is the AWS Free Tier?
28. What is a NAT Gateway?
29. Explain the Shared Responsibility Model in AWS.
30. What are AWS Tags and why are they used?
31. How do you secure data at rest and in transit in AWS?
32. Explain the difference between AWS S3 Standard and S3 Glacier.
33. How does AWS S3 versioning work?
34. What is AWS Elasticache?
35. Explain the concept of a bastion host.
36. How do you implement high availability in AWS?
37. What is AWS Direct Connect?
38. What are AWS Managed Services?
39. What is AWS Config?
40. How do you set up cross-region replication in S3?
41. Explain AWS KMS.
42. What is Amazon Redshift?
43. How does AWS handle data encryption?
44. What is Amazon EFS?
45. Explain AWS Elastic Transcoder.
46. What is AWS CodePipeline?
47. How do you implement disaster recovery in AWS?
48. What is AWS OpsWorks?
49. What is AWS Step Functions?
50. Explain the difference between Spot Instances and Reserved Instances.
51. What is Amazon SWF?
52. How do you secure an AWS API Gateway?
53. What are Placement Groups in AWS?
54. What is AWS CodeDeploy?
55. How does Amazon Athena work?
56. What is AWS Snowball?
57. Explain the concept of AWS CloudHSM.
58. What is AWS X-Ray?
59. How do you manage secrets in AWS?
60. Explain AWS Systems Manager.
61. What is the difference between horizontal and vertical scaling in AWS?
62. How does AWS Lambda handle cold starts?
63. What is a VPC peering connection and how does it work?
64. Explain the use of AWS Transit Gateway.
65. What is Amazon EKS?
66. How do you manage multi-account AWS environments?
67. Explain the concept of serverless architecture in AWS.
68. What are AWS Organizations?
69. How do you optimize costs in AWS?
70. What are the best practices for securing an AWS environment?
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DevOps is 20% building, 80% optimizing and operating.
Get the 'Day 0' basics right before jumping into tools.
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1. What is the role of IAM roles and policies?
2. Can you explain the Terraform plan and its purpose?
3. What is AWS Lambda, and how does it work?
4. How do you invoke a Lambda function, and where do you configure it?
5. Can you describe how Lambda handles scaling and event-based invocations?
6. What is Amazon CloudWatch, and have you configured any custom metrics?
7. What metrics are available on your CloudWatch dashboard?
8. How do you configure CPU utilization on your CloudWatch dashboard?
9. How do you attach an SSL certificate to an S3 bucket?
10. What type of encryption have you implemented in your project?
11. If an S3 bucket has a read-only policy, can you modify objects in the bucket?
12. Why did you choose Terraform over Boto3 for infrastructure provisioning?
13. What is a Content Delivery Network (CDN), and how does it work?
14. Have you created a Jenkins pipeline for your project?
15. How do you attach policies to IAM users, either individually or by group?
16. What type of deployment strategies are you using in your project?
17. Have you used any tools to create customized Amazon Machine Images (AMIs)?
18. What is connection draining, and how does it work?
19. How does an Elastic Load Balancer (ELB) distribute traffic?
20. What is auto-scaling, and how does it work?
21. Can you describe the different types of Load Balancers and provide examples?
22. What is the maximum runtime for a Lambda function?
23. What is the maximum memory size for a Lambda function?
24. How can you increase the runtime for a Lambda function?
25. What automations have you performed using Lambda in your project?
26. Why did you choose Terraform over Boto3 for infrastructure provisioning?
27. What modules have you used in your Lambda function?
28. Have you created an SNS topic for your project?
29. If you've exhausted IP addresses in your VPC, how would you provision new resources?
30. What is Groovy, and how is it used in Jenkins?
31. Why do you use Groovy in Jenkins, and where do you save Jenkins files?
32. What is Ansible, and what is its purpose?
33. What language do you use in Ansible?
34. Where do you run Terraform code, remotely or locally?
35. What is the purpose of access keys and secret keys in AWS?
36. What are Terraform modules, and have you used any in your project?
37. What environments have you set up for your project?
38. Do you use the same AWS account for all environments?
39. Do you have separate Jenkins servers for each environment?
40. Where do you write and save your Lambda function code?
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- Linux fundamentals
- Scripting (Python, Shell or PowerShell)
- Networking Fundamentals
- Cloud Fundamentals (VPC, S3, EC2, RDS)
- Storage (S3, EFS, EBS & DynamoDB)
- IAM roles, policies & security
- Git version control
- IaC (Terraform or CloudFormation)
- CI CD (Jenkins, AWS CodePipeline, CodeBuild & CodeDeploy)
- Cloud Automation (Python Boto3, AWS CLI)
- Cloud Cost Optimization (Budgets, Cost Explorer)
- Monitoring (CloudWatch, CloudTrail, Splunk or Prometheus/Grafana)
- Serverless (Lambda, EventBridge, API Gateway)
- Containers (ECS, EKS, Fargate)
This is for AWS Cloud. Pick any one cloud provider first!
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1.Can you walk us through your experience as a DevOps Engineer?
2.What has been your biggest challenge in DevOps, and how did you handle it? 3.What DevOps tools have you used for CI/CD pipeline automation? Can you describe how you set up a pipeline?
4.Have you worked with GitOps? Can you explain how it differs from traditional CI/CD?
5.How do you manage pipeline security and ensure compliance with DevSecOps best practices?
6.Have you used GitHub Actions? Can you describe a complex automation workflow you implemented?
7.How do you deploy and manage Kubernetes clusters in a production environment?
8.What challenges have you faced with Kubernetes deployments, and how did you troubleshoot them?
9.How do you handle Docker container security in a DevOps pipeline?
10.Can you explain the use of ArgoCD or Flux in an automated deployment setup?
11.Can you explain how you automate infrastructure provisioning using Terraform or Ansible?
12.How do you ensure IaC scripts remain maintainable and do not introduce vulnerabilities?
13.What experience do you have with AWS cloud technologies?
14.How do you manage multi-cloud (AWS & Azure) deployments effectively?
15.How do you optimize cloud costs while ensuring performance?
16.Have you developed applications using Java or Quarkus?
17.Can you explain the differences between RESTful APIs and GraphQL?
18.How do you handle authentication and security in API development?
19.What best practices do you follow for PostgreSQL database performance tuning?
20.Can you describe a critical production issue you encountered and how you resolved it?
21.How do you handle Incident Management (IM) and Critical Incident Management (CIM)?
22.What strategies do you use to reduce system downtime?
23.How do you approach Problem Management (PM) and Change Management (CM)?
24.What are the best practices you follow for securing applications and cloud infrastructure?
25.Have you worked with ITIL operation processes (Incident, Problem, Change management)?
26.How do you ensure compliance with industry security standards?
27.How do you integrate security scanning in CI/CD pipelines?
28.Have you worked in an Agile environment? How do you handle rapid changes in requirements?
29.How do you balance technical priorities vs. business needs?
30.How do you manage cross-functional collaboration in a DevOps team?
31.How do you handle conflict resolution within a team?
32.Have you worked with microservices architecture? How do you manage service communication and security?
33.Do you have experience with Nagios or other monitoring tools?
34.Can you describe a time when you had to mediate a dispute between team members
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If you’re into DevOps, Kubernetes, or CI/CD Pipelines, this is for you!
Check out the repo, explore the code, and feel free to reach out if you have any questions. Let's discuss and collaborate!🙌
📣 Note: Fork this Repository🧑💻 for upcoming future projects, Every week releases new Project.
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Are you looking for high-quality DevOps and Cloud learning materials? Look no further! We’ve built a powerful Docs Portal where you can access 900+ valuable resources with just one click!
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Choosing the ideal cloud load balancer is complex due to diverse offerings, demanding use cases, and the need for deep understanding
This Cheat Sheet simplifies the selection process, ensuring confident navigation of complexities
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Kubernetes networking is a critical aspect of managing containerized applications in a distributed environment. It ensures that containers within a Kubernetes cluster can communicate with each other, with external users, and with other services smoothly.
Let's explore the key concepts and components of Kubernetes networking:
- Pods share the same network namespace and can communicate via localhost.
- Kubernetes assigns each Pod a unique IP address for inter-node communication.
- Services provide stable endpoints for accessing Pods.
- ClusterIP, NodePort, and LoadBalancer are common Service types for internal and external access.
- Ingress manages external access to Services based on HTTP/HTTPS rules.
- Ingress controllers handle traffic routing to Services within the cluster.
- This defines rules for Pod-to-Pod communication and access to external resources.
- It enables fine-grained control over network traffic within the cluster.
- A standard for defining plugins that handle networking in container runtimes.
- Used by Kubernetes to manage network interfaces and IP addresses.
- Kube-Proxy manages network rules for routing traffic to Services.
- CoreDNS resolves DNS queries for Kubernetes Services and Pods.
Understanding Kubernetes networking is essential for deploying and managing containerized applications effectively within a Kubernetes cluster
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We curated a dedicated website showcasing real-time DevOps and Cloud projects — from beginner-friendly setups to advanced, production-grade pipelines. Whether you're just starting out or want to level up your DevOps skills, this site has hands-on projects that cover:
Perfect for self-learning, building your portfolio, and prepping for DevOps interviews — every project is clearly explained with architecture diagrams, tools used, and objectives.
Whether you're just starting out or looking to level up your DevOps journey, this is your one-stop hub for practical experience!
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If Kubernetes is your destination in 2025, Docker is the map.
Grasp container basics with Docker, and let Kubernetes guide their deployment at scale.
Explore these blogs for valuable insights into Docker➡️ ➡️
➡️ Docker Tutorial for Beginners – Introduction & Getting Started
https://lnkd.in/d_u5TrAi
➡️ Docker Volumes – Guide with Examples
https://lnkd.in/demuuzHR
➡️ What Is a Dockerfile And How To Build It – Best Practices
https://lnkd.in/dQdtVrix
➡️ Docker Networking – Basics, Network Types & Examples
https://lnkd.in/dtu3HPiv
➡️ Docker vs. Kubernetes: Container Solutions Comparison
https://lnkd.in/dp8sBGCN
➡️ Docker Compose vs Kubernetes – Differences Explained
https://lnkd.in/dCm9cK82
➡️ Docker Architecture Overview – Structure & Components
https://lnkd.in/dJRyY_gS
➡️ How to Keep Docker Secrets Secure: Complete Guide
https://lnkd.in/dNMyqZ97
➡️ Docker Cheat Sheet – 36 Docker CLI Commands
https://lnkd.in/d8f228S3
➡️ 21 Docker Security Best Practices: Daemon, Image, Containers
https://lnkd.in/dvcqCaai
➡️ Docker ENTRYPOINT and CMD : Differences & Examples
https://lnkd.in/dXYS-mV8
➡️ Docker Compose – What is It, Example & Tutorial
https://lnkd.in/d6cD5J4T
➡️ How to Stop and Remove Docker Containers
https://lnkd.in/dJ5ufZsW
➡️ Docker Ps Command – When to Use & Examples
https://lnkd.in/dB693Bgh
➡️ What is Docker Init & When to Use It – Best Practices
https://lnkd.in/dFxwiPQS
➡️ How to Expose a Docker Port – Tutorial & Examples
https://lnkd.in/dWYKFSMp
➡️ Docker Compose vs Kubernetes – Differences Explained
https://lnkd.in/dCm9cK82
➡️ Using Docker Cp Command to Copy Files in Containers [Examples]
https://lnkd.in/dbN6Ka-N
➡️ How to Create a CI/CD Pipeline with Docker [Tutorial]
https://lnkd.in/dTnGUNpd
➡️ How to List Docker Containers [All, Running, Stopped, and More]
https://lnkd.in/dF6NiU2J
➡️ Docker Swarm vs. Kubernetes – Key Differences Explained
https://lnkd.in/dXHh8GnB
➡️ How to Run Environment Variables in a Docker Container
https://lnkd.in/du3V4VFD
➡️ Docker Compose Logs – Guide to Monitoring & Debugging
https://lnkd.in/dWEtipdN
➡️ Top 12 Most Useful Docker Alternatives for 2025 [List]
https://lnkd.in/dTnGUNpd
📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs
Grasp container basics with Docker, and let Kubernetes guide their deployment at scale.
Explore these blogs for valuable insights into Docker
https://lnkd.in/d_u5TrAi
https://lnkd.in/demuuzHR
https://lnkd.in/dQdtVrix
https://lnkd.in/dtu3HPiv
https://lnkd.in/dp8sBGCN
https://lnkd.in/dCm9cK82
https://lnkd.in/dJRyY_gS
https://lnkd.in/dNMyqZ97
https://lnkd.in/d8f228S3
https://lnkd.in/dvcqCaai
https://lnkd.in/dXYS-mV8
https://lnkd.in/d6cD5J4T
https://lnkd.in/dJ5ufZsW
https://lnkd.in/dB693Bgh
https://lnkd.in/dFxwiPQS
https://lnkd.in/dWYKFSMp
https://lnkd.in/dCm9cK82
https://lnkd.in/dbN6Ka-N
https://lnkd.in/dTnGUNpd
https://lnkd.in/dF6NiU2J
https://lnkd.in/dXHh8GnB
https://lnkd.in/du3V4VFD
https://lnkd.in/dWEtipdN
https://lnkd.in/dTnGUNpd
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In Kubernetes, both LoadBalancer service and Ingress resources serve the purpose of exposing services to the external world but they operate at different levels and have distinct use cases.
The LB service type is primarily used when we want to expose a service to the external world and have K8s automatically provision an external load balancer to handle incoming traffic. When we create a LB service, Kubernetes communicates with the cloud provider's API to provision a load balancer, which then directs traffic to the associated service. The external IP address is dynamically assigned by the cloud provider.
However, LoadBalancer service is cloud-provider specific. It doesn't provide enterprise level standards that include advanced routing configurations. Additionally, using a LB for each service would increase cost of using static IPs by the cloud provider.
On the other hand, Ingress resource allows us to define rules for routing external traffic to different services within the cluster. An Ingress controller interprets these rules and configures the underlying load balancer or reverse proxy to handle the routing accordingly. Ingress service works across different cloud providers allowing more advanced and flexible routing of HTTP and HTTPS traffic to different services within the cluster.
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- Deployment manifest files
- Jenkins deployments & configurations
- Kubernetes Ingress files
- Realtime projects manifest files
- Helm charts for any application
- End to End Manifest files for any applications
- Includes AWS ELK Stack (Elasticsearch, Logstash, Kibana)
- Network service configurations templates
- Application monitoring templates for any applications
- Complete application launch manifest files for Realtime projects
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Just wrapped up a comprehensive guide on setting up Ansible for automating server management, provisioning, and configuration! Here's what we covered
An open-source tool for automation, known for its simplicity and agentless architecture.
Step-by-step instructions to configure Ansible on multiple servers, including SSH key setup and hosts file configuration.
Examples of ad hoc commands to check server status, install packages like NGINX, and troubleshoot issues.
How to resolve permission issues and other common challenges in Ansible setups.
Automating the installation and management of NGINX and Docker on Ubuntu and redhat Linux 2 servers.
A glimpse into inventory file configurations and a teaser for the next post about creating and using playbooks in Ansible.
With its agentless approach, YAML-based playbooks, and Python dependencies, Ansible is a game-changer for:
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In the DevOps dynamic landscape, ensuring application security before release is crucial. By implementing proactive measures during the pre-release stage, organizations can mitigate risks and foster a culture of secure software development.
The Pre-Release Security Pillars:
Modern DevOps platforms like GitLab Secure, JFrog Xray, Snyk, Palo Alto Prisma Cloud, and CrowdStrike offer comprehensive pre-release security tools, enabling organizations to address vulnerabilities and deliver secure applications proactively.
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