Rolling Arrays Consulting AWS Devops Engineer Interview Questions and Answers

I primarily use IAC tools like Terraform to create AWS resources for consistency, version control, and automation.

• I prefer using IAC tools like Terraform for creating AWS resources as it allows for infrastructure as code, version control, and automation.

• Using IAC tools ensures consistency in resource creation across environments.

• GUI can be useful for quick prototyping or exploring AWS services, but IAC is more efficien...read more

Yes, I have faced issues while creating or monitoring pods in a Kubernetes cluster.

• One common issue is pods getting stuck in a pending state due to resource constraints or scheduling issues.

• Another issue is pods crashing frequently due to misconfigured settings or incompatible container images.

• Monitoring pods can be challenging, especially when dealing with a large number of pods and trying to track their health and pe...read more

Versioning in S3 allows for preserving, retrieving, and restoring every version of an object stored in a bucket.

• Enables recovery from unintended user actions or application failures

• Helps in maintaining different versions of objects for audit or compliance purposes

• Prevents accidental deletion or overwriting of objects

• Useful for tracking changes and rolling back to previous versions if needed

I have experience with various DevOps tools including Jenkins, Docker, Ansible, and Terraform.

• Jenkins

• Docker

• Ansible

• Terraform

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

CI/CD pipeline is a set of automated processes that allow developers to continuously integrate code changes and deploy them to production.

• Continuous Integration (CI) involves automatically building and testing code changes as they are committed to a shared repository.

• Continuous Deployment (CD) involves automatically deploying code changes to production environments after passing automated tests.

• CI/CD pipelines typicall...read more

DaemonSet ensures that all or some nodes run a copy of a Pod

• DaemonSet is a Kubernetes resource that ensures a copy of a Pod is running on all or some nodes in the cluster

• It is useful for running a single instance of a Pod on every node, such as log collection or monitoring agents

• DaemonSet automatically adds or removes Pods as nodes are added or removed from the cluster

AWS provides a variety of networking services to help users manage their network infrastructure.

• Virtual Private Cloud (VPC) allows users to create isolated networks within the AWS cloud

• Elastic Load Balancing distributes incoming traffic across multiple instances to ensure high availability

• Route 53 is a scalable domain name system (DNS) web service

• Direct Connect allows users to establish a dedicated network connection b...read more

Terraform module is a reusable, configurable, and self-contained collection of Terraform resources.

• Terraform modules help organize and reuse code for infrastructure components

• Modules can be shared and reused across different projects

• Modules can have input variables to customize their behavior

• Modules can output values that can be used by other parts of the infrastructure code

GitOps tools help automate infrastructure management, version control, and deployment processes.

• Enables infrastructure as code practices

• Facilitates version control for infrastructure configurations

• Automates deployment processes

• Promotes collaboration and visibility among team members

• Examples: Argo CD, Flux, Jenkins X

AWS Secret Manager is a service that helps you protect access to your applications, services, and IT resources.

• It allows you to securely store, manage, and retrieve sensitive credentials and configuration data.

• You can rotate, manage, and retrieve secrets throughout their lifecycle.

• Integrates with AWS services like Lambda, EC2, RDS, and more for secure access to secrets.

• Helps you meet security and compliance requirement...read more

To ensure high availability of EKS cluster, utilize multiple availability zones, implement auto-scaling, use managed node groups, and set up monitoring and alerts.

• Utilize multiple availability zones to distribute workload and ensure redundancy.

• Implement auto-scaling to automatically adjust resources based on demand.

• Use managed node groups to simplify node management and ensure high availability.

• Set up monitoring and al...read more

Liveness and readiness probes are used in Kubernetes to check the health of containers.

• Liveness probe checks if a container is running and healthy. If it fails, Kubernetes restarts the container.

• Readiness probe checks if a container is ready to serve traffic. If it fails, Kubernetes stops sending traffic to the container.

• Probes are configured in the pod's YAML file using the 'livenessProbe' and 'readinessProbe' fields.

• ...read more

Application deployment on Windows server involves packaging the application, configuring the server, and deploying the application using tools like IIS or PowerShell.

• Package the application into a deployable format such as a zip file or MSI installer

• Configure the Windows server with necessary dependencies and settings for the application to run

• Deploy the application using tools like Internet Information Services (IIS) ...read more