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#1. What is the purpose of using Docker in a DevOps environment?
Explanation: Docker is used to containerize applications, ensuring consistency across different environments.
#2. Scenario: Your application needs to be deployed across multiple environments (development, staging, production) with consistent configurations. What should you use?
Explanation: IaC allows you to manage and provision infrastructure through code, ensuring consistency across different environments.
#3. Which Kubernetes object should you use to maintain a specified number of pod replicas running?
Explanation: ReplicaSet ensures a specified number of pod replicas. Deployments use ReplicaSets under the hood.
#4. Scenario: Your team is frequently experiencing merge conflicts when integrating code. What should you implement to mitigate this issue?
Explanation: Continuous Integration helps to frequently merge code changes into a shared repository, reducing the chances of merge conflicts by identifying them early.
#5. You need to securely inject sensitive data into a Kubernetes pod. What should you use?
Explanation: Secrets are used to manage sensitive data securely in Kubernetes.
#6. You encounter a lock error when running terraform apply. What might resolve it?
Explanation: Force-unlocking resolves lock contention issues in Terraform state files.
#7. Which tool is commonly used for continuous integration and continuous delivery (CI/CD)?
Explanation: Jenkins is a popular open-source automation server used to implement CI/CD pipelines.
#8. You encounter an issue where a container cannot connect to an external API. What should you check first?
Explanation: Networking issues, including DNS, often cause connectivity problems.
#9. Scenario: You want to ensure that your application can handle a sudden increase in traffic. What should you implement?
Explanation: Load testing helps simulate high traffic conditions and identifies potential bottlenecks, ensuring your application can handle increased loads.
#10. What type of Kubernetes service is used to expose an application to the internet?
Explanation: A LoadBalancer service routes external traffic to the application.
#11. Which command can you use to debug a running Kubernetes pod?
Explanation: Each command provides specific debugging information: logs for output, exec for shell access, and describe for configuration details.
#12. You notice a pod in the CrashLoopBackOff state. What should you check first?
Explanation: Pod logs often provide the root cause of the failure.
#13. Which Docker command would you use to view all running and stopped containers on a host?
Explanation: The -a flag shows all containers, including stopped ones.
#14. How can you ensure that a pod is scheduled on a specific node?
Explanation: All listed methods can influence pod scheduling on specific nodes.
#15. Scenario: Your team needs to develop, test, and deploy applications quickly and reliably. What approach should you adopt?
Explanation: Agile and DevOps practices promote collaboration, automation, and iterative development, enabling faster and more reliable application delivery.