Hexaware Technologies AWS Devops Engineer Interview Questions, Process, and Tips

Terraform will recreate the instance as per the template

• Terraform will detect that the instance is missing and recreate it based on the template

• The new instance will have the same configuration as defined in the template

• Any changes made to the instance outside of Terraform will be lost

The IP range for 500 IPs would typically be a /23 subnet.

• For 500 IPs, you would need at least a /23 subnet.

• A /23 subnet provides 512 IP addresses (2^9 = 512), with 510 usable IPs after subtracting network and broadcast addresses.

• The IP range for a /23 subnet would be from x.x.x.0 to x.x.x.255.

Health checks after creating instances ensure the instances are functioning properly.

• Instance status checks ensure the instance is reachable and responding to traffic.

• System status checks ensure the underlying hardware is functioning properly.

• Example: If an instance fails the system status check, it may indicate a problem with the underlying host hardware.

Microservices can be deployed using containerization tools like Docker and orchestration tools like Kubernetes.

• Use containerization tools like Docker to package each microservice along with its dependencies into a container image.

• Leverage orchestration tools like Kubernetes to manage and deploy multiple microservices across a cluster of machines.

• Implement continuous integration and continuous deployment (CI/CD) pipelin...read more

Launch an EC2 instance in a VPC and attach a role using Terraform

• Define a VPC resource in Terraform

• Define a subnet resource within the VPC

• Create a security group for the EC2 instance

• Define an IAM role for the EC2 instance

• Launch an EC2 instance within the subnet and attach the IAM role

Dockerfile is a text document that contains all the commands a user could call on the command line to assemble an image.

• Dockerfile is used to build Docker images by specifying a series of instructions.

• It includes commands like FROM, RUN, COPY, CMD, etc.

• Each instruction in the Dockerfile creates a layer in the image.

• Dockerfile is used to automate the process of creating Docker containers.

• Example: FROM ubuntu:latest, RUN

Webhook is a method of augmenting or altering the behavior of a web page, or web application, with custom callbacks.

• Webhook is a way for an application to provide other applications with real-time information.

• It allows developers to receive instant notifications when a specific event occurs.

• Webhooks are commonly used in automation, continuous integration, and deployment processes.

• Examples include receiving notification...read more

I faced issues with network connectivity, configuration errors, and dependency mismatches while deploying the application.

• Network connectivity issues causing deployment failures

• Configuration errors leading to incorrect application setup

• Dependency mismatches causing compatibility issues

• Resource constraints impacting deployment performance

S3 life cycle rules automate the management of objects in S3 buckets based on predefined criteria.

• Automate the transition of objects to different storage classes based on age or other criteria

• Automatically delete objects after a certain period of time

• Reduce storage costs by moving less frequently accessed data to cheaper storage options

I have used code reviews, automated testing, static code analysis tools, and continuous integration to check the quality of code.

• Code reviews by peers to catch bugs and ensure best practices

• Automated testing using tools like Selenium for functional testing and JUnit for unit testing

• Static code analysis tools like SonarQube to identify code smells and potential bugs

• Continuous integration with tools like Jenkins to autom

CodePipeline is a continuous integration and continuous delivery service for fast and reliable application and infrastructure updates.

• Automates the build, test, and deploy phases of your release process

• Supports integration with various AWS services like CodeBuild, CodeDeploy, and Lambda

• Allows for custom actions and third-party integrations

• Provides visualization of the entire release process with customizable dashboards

Blue green deployment is a deployment strategy where two identical production environments are used to minimize downtime and risk.

• Blue green deployment involves running two identical production environments, one 'blue' and one 'green'.

• Traffic is routed to the 'blue' environment while the 'green' environment is updated and tested.

• Once the 'green' environment is deemed stable, traffic is switched to it and the 'blue' env...read more

I have a strong background in AWS services, DevOps practices, and a proven track record of successfully implementing automation and improving efficiency.

• Extensive experience with AWS services such as EC2, S3, Lambda, and CloudFormation

• Proficient in DevOps tools like Jenkins, Docker, and Kubernetes

• Implemented CI/CD pipelines to automate software delivery processes

• Improved system reliability and scalability through infra...read more