Repsoft Consultancy Services Interview Questions and Answers

Docker commands and concepts comparison

• Run vs entry point: 'docker run' is used to create a new container while 'entrypoint' specifies the command to run when the container starts.

• Copy vs add: 'COPY' is used to copy files from the host to the container while 'ADD' can also fetch files from URLs and extract tarballs.

• Process vs demons: Processes are foreground tasks that run in the container while daemons are background

To ensure high availability of an application, implement redundancy, load balancing, monitoring, and disaster recovery.

• Implement redundancy by having multiple instances of the application running in different servers or data centers.

• Use load balancing to distribute incoming traffic across multiple servers to prevent overload on any single server.

• Set up monitoring tools to constantly check the health and performance of ...read more

VNet peering allows connecting virtual networks in Azure

• VNet peering enables resources in different virtual networks to communicate securely

• Traffic between peered VNets stays on the Microsoft backbone network

• No public internet, gateways, or encryption needed for communication between peered VNets

Subnets on virtual machines refer to dividing a network into smaller segments for better organization and security.

• Subnets help in managing network traffic efficiently

• Each subnet can have its own security policies and access controls

• Subnets can be used to isolate different parts of a network for security reasons

DevOps engineers are responsible for automating, monitoring, and maintaining the infrastructure and deployment pipelines.

• Automating build and deployment processes using tools like Jenkins, GitLab CI/CD, or CircleCI

• Monitoring system performance and availability using tools like Prometheus, Grafana, or ELK stack

• Collaborating with development and operations teams to streamline processes and improve efficiency

• Managing infr...read more

Using Docker image build and deployment in AKS with ACR

• Create a Dockerfile to define the image

• Build the Docker image using 'docker build' command

• Push the image to Azure Container Registry (ACR)

• Create a Kubernetes deployment manifest referencing the image in ACR

• Deploy the application to Azure Kubernetes Service (AKS)