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Cloud computing is a critical skill for modern IT professionals, especially those targeting roles in AWS, Azure, DevOps, or general cloud infrastructure. Below are key interview questions with detailed answers, followed by practical commands and steps to reinforce your knowledge.
1️⃣ What is Cloud Computing?
Answer: Cloud computing delivers computing services—servers, storage, databases, networking, and software—over the internet (“the cloud”). Users access resources on-demand without managing physical infrastructure.
You Should Know:
- AWS CLI to check available services:
aws ec2 describe-instances
- Azure CLI to list resources:
az resource list
2️⃣ What are the different cloud service models?
Answer:
- IaaS (Infrastructure as a Service) – Virtualized computing resources (e.g., AWS EC2, Azure VM).
- PaaS (Platform as a Service) – Managed development platforms (e.g., AWS Elastic Beanstalk, Google App Engine).
- SaaS (Software as a Service) – Fully managed applications (e.g., Gmail, Salesforce).
You Should Know:
- Deploy a VM in AWS:
aws ec2 run-instances --image-id ami-0abcdef1234567890 --instance-type t2.micro --key-name MyKeyPair
- Azure VM creation:
az vm create --resource-group MyRG --name MyVM --image UbuntuLTS --admin-username azureuser
3️⃣ What’s the difference between public, private, and hybrid cloud?
Answer:
- Public Cloud – Shared infrastructure (AWS, Azure, GCP).
- Private Cloud – Dedicated infrastructure for a single org.
- Hybrid Cloud – Combines public and private for flexibility.
You Should Know:
- Check AWS VPC (Virtual Private Cloud):
aws ec2 describe-vpcs
- List Azure Private Clouds:
az network private-cloud list
4️⃣ What is Serverless Computing?
Answer: Serverless allows running code without managing servers (e.g., AWS Lambda, Azure Functions).
You Should Know:
- Deploy an AWS Lambda function:
aws lambda create-function --function-name MyFunction --runtime python3.8 --handler lambda_function.lambda_handler --role arn:aws:iam::123456789012:role/lambda-role --zip-file fileb://function.zip
- Trigger Azure Function:
az functionapp function keys list --name MyFunctionApp --resource-group MyRG --function-name HttpTrigger
5️⃣ What are Containers, and how do they differ from Virtual Machines (VMs)?
Answer:
- VMs – Run full OS on a hypervisor (slower, more resources).
- Containers – Lightweight, share OS kernel (e.g., Docker, Kubernetes).
You Should Know:
- Run a Docker container:
docker run -d -p 80:80 nginx
- Kubernetes pod deployment:
kubectl create deployment nginx --image=nginx
What Undercode Say
Mastering cloud computing requires both theoretical knowledge and hands-on practice. Use CLI commands to automate deployments, manage resources, and troubleshoot issues. Strengthen your skills with real-world labs on AWS, Azure, and Kubernetes.
Expected Output:
aws ec2 describe-instances az resource list docker run -d -p 80:80 nginx kubectl get pods
Relevant URLs:
References:
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