DevOps Interview Q & A for Beginners (Level 1)

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#1. 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.

#2. Which Terraform command is used to apply changes to infrastructure?

terraform init

terraform plan

terraform apply

terraform validate

Explanation: terraform apply applies the planned changes to the infrastructure.

#3. Scenario: Your application needs to be deployed across multiple environments (development, staging, production) with consistent configurations. What should you use?

Manual configuration updates

Docker Compose

Infrastructure as Code (IaC)

Continuous Monitoring

Explanation: IaC allows you to manage and provision infrastructure through code, ensuring consistency across different environments.

#4. 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.

#5. What happens if a resource is removed from the Terraform configuration?

It is ignored during the next apply

It is deleted during the next apply

It generates an error during plan

Terraform will prompt you to confirm the deletion

Explanation: Terraform manages the lifecycle of resources defined in its configuration.

#6. You encounter an issue where a container cannot connect to an external API. What should you check first?

The container’s DNS configuration

The CMD directive in the Dockerfile

The container’s CPU allocation

The container’s image version

Explanation: Networking issues, including DNS, often cause connectivity problems.

#7. Scenario: You want to ensure that your application can handle a sudden increase in traffic. What should you implement?

Automated backups

Load testing

Version control

Continuous Integration

Explanation: Load testing helps simulate high traffic conditions and identifies potential bottlenecks, ensuring your application can handle increased loads.

#8. What is the primary benefit of using version control systems like Git in DevOps?

To run tests on the code

To automate deployments

To track and manage changes in code

To manage cloud resources

Explanation: Version control systems help track and manage code changes, facilitating collaboration and improving code quality.

#9. 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.

#10. How can you ensure that a pod is scheduled on a specific node?

Use a Node Selector

Use an Affinity Rule

Set a Node Label and use Node Affinity

All of the above

Explanation: All listed methods can influence pod scheduling on specific nodes.

#11. 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.

#12. Which of the following is a primary goal of DevOps?

Enhance security at all costs

Speed up software development

Reduce the collaboration between teams

Delay software releases

Explanation: DevOps aims to speed up software development by fostering collaboration between development and operations teams and automating processes.

#13. 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.

#14. What type of Kubernetes service is used to expose an application to the internet?

ClusterIP

NodePort

LoadBalancer

ExternalName

Explanation: A LoadBalancer service routes external traffic to the application.

#15. What is Infrastructure as Code (IaC)?

Writing code in the infrastructure

Managing and provisioning computing infrastructure through code

Running applications directly on hardware

Deploying applications without servers

Explanation: IaC involves managing infrastructure through code, making it easier to deploy, manage, and scale environments.

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