HCLTech AWS Devops Engineer Interview Questions and Answers

Grant access to S3 bucket securely by using IAM policies and roles.

• Create an IAM policy with specific permissions for the S3 bucket

• Attach the IAM policy to an IAM role

• Assign the IAM role to the user or group that needs access

• Use bucket policies for more granular control if needed

IAM role is used to grant permissions to entities, while IAM group is used to group users with similar permissions.

• IAM role is used to delegate permissions to entities like EC2 instances or Lambda functions

• IAM group is used to group users with similar permissions for easier management

• IAM role can be assumed by trusted entities, while IAM group is used for managing user permissions

git fetch downloads changes from the remote repository, while git pull downloads changes and merges them into the current branch.

• git fetch only downloads changes from the remote repository, but does not merge them into the current branch

• git pull downloads changes from the remote repository and merges them into the current branch

• git fetch is useful for reviewing changes before merging, while git pull is a shortcut for f

The 'add' command is used to add files from the source directory to the destination directory in a Dockerfile, while the 'copy' command is used to copy files from the source directory to the destination directory in a Dockerfile.

• The 'add' command can also accept URLs as the source, while the 'copy' command cannot.

• The 'add' command can automatically extract compressed files, while the 'copy' command cannot.

• The 'copy' co...read more

Kubernetes pod creation and replicaset events in Kubernetes Ingress controller.

• Pod creation involves defining a pod specification in a YAML file and using 'kubectl create' command to create the pod.

• Replicaset events can be monitored using 'kubectl describe replicaset' command to check for events related to the replicaset.

• Ingress controller manages external access to services in a Kubernetes cluster by routing traffic b...read more

Creating a Jenkins job using an image in Docker

• Create a Dockerfile with necessary configurations for Jenkins job

• Build a Docker image using the Dockerfile

• Run a Jenkins container using the Docker image

• Configure Jenkins job to use the Docker image as the build environment

ECS is Elastic Container Service and EKS is Elastic Kubernetes Service. Troubleshoot code in paused state by checking logs and restarting tasks. Troubleshoot ingress controller by checking configuration and logs. ALB is Application Load Balancer.

• ECS is a managed container orchestration service by AWS

• EKS is a managed Kubernetes service by AWS

• To troubleshoot code in paused state in ECS, check CloudWatch logs, task defini...read more

Jenkins CI/CD flow automates the software delivery process from code commit to deployment.

• Jenkins pulls code from version control system

• Builds the code and runs automated tests

• If tests pass, deploys the code to a staging environment

• Manual testing is done in staging environment

• If approved, Jenkins deploys the code to production environment

• Logs and reports are generated throughout the process

Kubernetes is an open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications.

• Kubernetes is used to manage and automate the deployment of containerized applications.

• It provides a platform for running and scaling applications across a cluster of machines.

• Kubernetes ensures high availability and fault tolerance by automatically restarting failed contain...read more