DevOps Interview Q & A for Beginners (Level 1)

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#1. Which command can you use to debug a running Kubernetes pod?

kubectl logs

kubectl exec

kubectl describe pod

All of the above

Explanation: Each command provides specific debugging information: logs for output, exec for shell access, and describe for configuration details.

#2. Scenario: Your team needs to develop, test, and deploy applications quickly and reliably. What approach should you adopt?

Waterfall development

Agile and DevOps practices

Manual deployments

Traditional IT operations

Explanation: Agile and DevOps practices promote collaboration, automation, and iterative development, enabling faster and more reliable application delivery.

#3. You notice a pod in the CrashLoopBackOff state. What should you check first?

Logs of the failed pod

Node status

Kubernetes API server logs

Network policies

Explanation: Pod logs often provide the root cause of the failure.

#4. You need to deploy an application with a dependency on a specific version of a library. How do you ensure the container uses the correct version?

Specify the version in the Docker Compose file

Include the version in the FROM directive of the Dockerfile

Use an external configuration file at runtime

Build the image using a multistage build

Explanation: The FROM directive determines the base image version, ensuring consistency.

#5. What does the terraform refresh command do?

Updates state file to match real-world resources

Resets the Terraform configuration

Deletes unused resources

Updates the provider plugin

Explanation: terraform refresh syncs the state file with actual resource statuses.

#6. You want to run a container in the background and expose a port. Which command should you use?

docker run -it

docker run -d -p

docker exec -p

docker-compose up -d

Explanation: The -d flag runs the container in detached mode, and -p maps ports.

#7. How do you define a reusable module in Terraform?

Use a .module file

Organize resources in a directory and reference it in module blocks

Write a custom provider

Use a terraform block

Explanation: Modules are created by grouping Terraform configuration files into directories.

#8. Which of the following best describes continuous integration?

The practice of merging all developers' working copies to a shared mainline several times a day

The practice of deploying code to production automatically

The practice of testing code only once before deployment

The practice of using virtual machines in development

Explanation: Continuous integration involves frequent integration of code changes into a shared repository, allowing for early detection of integration issues.

#9. What is the role of Kubernetes in a DevOps environment?

Version control

Continuous integration

Container orchestration

Code review

Explanation: Kubernetes is a container orchestration platform that automates the deployment, scaling, and management of containerized applications.

#10. What does the term "shift left" refer to in DevOps?

Moving testing to later stages of development

Integrating security practices into the beginning of the development process

Using more hardware resources

Deploying applications without testing

Explanation: “Shift left” means integrating and addressing issues like security and testing earlier in the development cycle to identify and resolve problems sooner.

#11. Which Docker command would you use to view all running and stopped containers on a host?

docker ps

docker ps -a

docker container list

docker inspect

Explanation: The -a flag shows all containers, including stopped ones.

#12. What is the primary purpose of a Kubernetes Ingress?

To handle internal pod communication

To provide external HTTP and HTTPS routing to services

To allocate persistent storage to pods

To monitor pod health

Explanation: Ingress manages HTTP and HTTPS traffic routing to Kubernetes services.

#13. How would you prevent sensitive data from being logged in Terraform state files?

Use the sensitive argument in variable definitions

Encrypt the state file manually

Use an external key management tool

Store variables in .tfvars

Explanation: Marking variables as sensitive ensures they are not logged in plaintext.

#14. How can you reduce the size of a Docker image during the build process?

Use a lightweight base image

Use multiple RUN commands for each package installation

Include development dependencies in the image

Use the ADD directive instead of COPY

Explanation: Lightweight base images like alpine reduce the overall image size.

#15. Which backend is commonly used to store Terraform state in AWS?

AWS DynamoDB

Amazon RDS

Amazon S3

AWS Lambda

Explanation: S3 is the most common backend for storing Terraform state files.

Finish