90+ Cloud & DevOps Interview Questions with Hands-On Demos for Job Mastery
1. AWS Load Balancers
- What are the differences between Application Load Balancer and Network Load Balancer?
- How would you configure health checks for a load-balanced EC2 setup?
- How does session stickiness work in AWS ELB?
- What are the security considerations when exposing a web app via ELB?
- How do you integrate ELB with Auto Scaling groups?
2. AWS VPC Peering
- What are the limitations of VPC peering across regions?
- How do route tables need to be configured for successful peering?
- Can you peer two VPCs with overlapping CIDR blocks?
- How would you troubleshoot connectivity issues between peered VPCs?
- What are the billing implications of VPC peering?
3. Amazon S3 Usage
- How do you configure lifecycle policies for archival and deletion?
- What’s the difference between S3 Standard and S3 Intelligent-Tiering?
- How do you secure S3 buckets against public access?
- How would you enable versioning and handle object recovery?
- What are common use cases for S3 event notifications?
4. MongoDB on EC2 with NAT Gateway
- Why use a NAT Gateway in MongoDB deployment?
- How do you secure MongoDB access on EC2?
- What are the steps to install and configure MongoDB on Ubuntu EC2?
- How do you monitor MongoDB performance in AWS?
- What backup strategies would you recommend for MongoDB on EC2?
5. WordPress & MariaDB on LAMP
- How do you configure Apache and PHP for WordPress performance?
- What are the steps to connect WordPress to MariaDB securely?
- How do you migrate an existing WordPress site to this stack?
- What are common security hardening steps for LAMP?
- How do you enable SSL for WordPress on LAMP?
6. Terraform Demos
- What is the purpose of
terraform init,plan, andapply? - How do you manage state files securely in a team?
- What’s the difference between
countandfor_eachin Terraform? - How do you handle environment-specific variables?
- How would you modularize Terraform code for reuse?
7. Intranet POCs
- What are key components of a secure intranet architecture?
- How do you restrict access to internal services in AWS?
- What role does Route 53 play in intranet DNS resolution?
- How do you simulate internal-only traffic for testing?
- What monitoring tools would you use for intranet health?
8. AWS CloudFormation Templates and POCs
- How do you structure a reusable CloudFormation template?
- What’s the difference between parameters and mappings?
- How do you handle rollback scenarios in failed deployments?
- How do nested stacks improve modularity?
- What are best practices for tagging resources in templates?
9. Infrastructure as Code (IAC) Design
- How do you convert manual architecture diagrams into IAC?
- What tools would you use to validate IAC syntax and logic?
- How do you ensure idempotency in IAC deployments?
- What’s the role of CI/CD in IAC workflows?
- How do you document IAC for team onboarding?
10. On-Premises AD to AWS AD Migration
- What are the steps to sync users from on-prem AD to AWS Managed AD?
- How do you handle DNS resolution between on-prem and AWS?
- What tools assist in AD migration and replication?
- How do you secure AD traffic over VPN or Direct Connect?
- What are common pitfalls in AD trust relationships?
11. Docker Demos
- How do you build and tag Docker images for deployment?
- What’s the difference between Docker volumes and bind mounts?
- How do you orchestrate containers using Docker Compose?
- How do you secure Docker containers in production?
- What are best practices for Dockerfile optimization?
12. Live Tasks & Screen Operations
- How do you document live task execution for auditability?
- What tools help capture screen operations in real time?
- How do you handle errors during live deployment?
- What’s your approach to rollback in live environments?
- How do you ensure accessibility in screen walkthroughs?
13. EBS Volumes Setup and Usage
- How do you attach and mount EBS volumes to EC2?
- What’s the difference between gp3 and io2 volume types?
- How do you resize EBS volumes without downtime?
- What are snapshot strategies for EBS backups?
- How do you monitor EBS performance metrics?
14. AWS EBS Volumes Usage
- How do you encrypt EBS volumes at rest?
- What’s the lifecycle of an EBS volume from creation to deletion?
- How do you automate EBS provisioning with IAC?
- What are common use cases for multi-volume EC2 setups?
- How do you troubleshoot EBS latency issues?
15. POC Demos
- What defines a successful cloud POC?
- How do you scope and document a POC?
- What metrics do you track during a POC?
- How do you transition from POC to production?
- What are common blockers in POC execution?
16. EFS Demos
- How do you mount EFS across multiple EC2 instances?
- What’s the difference between EFS and EBS?
- How do you secure EFS access using IAM and security groups?
- What are performance modes in EFS?
- How do you monitor EFS usage and billing?
17. AWS AMI Usage
- How do you create a custom AMI from an EC2 instance?
- What are the benefits of using AMIs in Auto Scaling?
- How do you share AMIs across accounts?
- What’s the lifecycle of an AMI update?
- How do you automate AMI creation in CI/CD?
18. AWS Boto3 Solution Demos
- How do you authenticate Boto3 scripts securely?
- What are common use cases for Boto3 automation?
- How do you handle pagination in Boto3 API calls?
- How do you manage EC2 instances using Boto3?
- What’s the best way to log and monitor Boto3 scripts?
For the real demos of the above tasks:
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