10+ Indian Political Action Committee Interview Questions and Answers

You can use the Docker API to remotely run Docker commands on a Linux server without taking a separate SSH session.

• Use the Docker API to interact with the Docker daemon on the remote Linux server.

• Make sure Docker is installed and running on both your laptop and the remote server.

• Authenticate with the remote server using appropriate credentials.

• Establish a connection to the Docker daemon on the remote server using the Docker API.

• Send the desired Docker command to the remote se...read more

The command used to delete a branch in Git is 'git branch -d <branch_name>'.

• Use 'git branch -d <branch_name>' to delete a branch in Git.

• Make sure to switch to a different branch before deleting the branch.

• If the branch has not been merged, use 'git branch -D <branch_name>' to force delete.

CMD specifies the default command to run in the container, while ENTRYPOINT specifies the executable to run when the container starts.

• CMD is often used to provide default arguments for the ENTRYPOINT command

• ENTRYPOINT is used to specify the executable that will run when the container starts

• CMD can be overridden at runtime by passing arguments to docker run command

• ENTRYPOINT cannot be overridden at runtime, but can be combined with CMD to provide default arguments

The lifecycle of a Docker container involves creation, running, pausing, restarting, and stopping.

• 1. Creation: A Docker container is created from a Docker image using the 'docker run' command.

• 2. Running: The container is started and runs the specified application or service.

• 3. Pausing: The container can be paused using the 'docker pause' command, which temporarily stops its processes.

• 4. Restarting: The container can be restarted using the 'docker restart' command.

• 5. Stopping:...read more

git revert undoes a specific commit by creating a new commit, while git reset moves the HEAD to a previous commit without creating a new commit.

• git revert creates a new commit that undoes a specific commit, keeping the commit history intact

• git reset moves the HEAD to a previous commit, potentially discarding changes made after that commit

• git revert is safer for shared branches as it does not rewrite history, while git reset can be used for local branches to reset to a previou...read more

Monitoring a Kubernetes cluster involves using tools like Prometheus, Grafana, and Kubernetes Dashboard.

• Use Prometheus for collecting metrics from Kubernetes components and applications running on the cluster.

• Set up Grafana for visualizing the collected metrics and creating dashboards for monitoring.

• Utilize Kubernetes Dashboard for a graphical interface to view and manage the cluster resources.

• Implement alerts and notifications using tools like Prometheus Alertmanager to proa...read more

Jenkins is an open-source automation server that helps to automate the non-human part of the software development process.

• Jenkins is a Java-based application that runs in a servlet container like Apache Tomcat.

• It can be installed on a single server or distributed across multiple servers for scalability.

• Jenkins uses plugins to extend its functionality, allowing integration with various tools and technologies.

• It follows a master-slave architecture where the master node manages ...read more

AWS provides a wide range of services and tools that support the principles and practices of DevOps.

• AWS offers infrastructure as code tools like CloudFormation and Terraform for automating the provisioning of resources.

• AWS provides a variety of monitoring and logging services such as CloudWatch and CloudTrail to help with continuous monitoring and feedback loops.

• AWS supports continuous integration and continuous deployment (CI/CD) pipelines through services like AWS CodePipel...read more

A Docker image registry is a repository for storing and managing Docker images.

• It allows users to push and pull Docker images to and from the registry.

• Popular Docker image registries include Docker Hub, Amazon ECR, and Google Container Registry.

• Registries can be public or private, with private registries requiring authentication for access.

Docker has 3 main components: Docker Engine, Docker Images, and Docker Containers.

• Docker Engine is the core component responsible for running and managing Docker containers.

• Docker Images are read-only templates used to create Docker containers.

• Docker Containers are lightweight, standalone, and executable packages that include everything needed to run a piece of software.

LVM stands for Logical Volume Manager, used to manage disk space efficiently by allowing for dynamic resizing of volumes.

• LVM allows for easy resizing of volumes without the need to unmount the filesystem

• It provides features like snapshots, striping, mirroring, and thin provisioning

• LVM can span multiple physical disks to create a single logical volume

Continuous Testing (CT) is the process of executing automated tests as part of the software delivery pipeline to obtain immediate feedback on the business risks associated with a software release candidate.

• CT helps in identifying defects early in the development cycle.

• It ensures that the software is always in a releasable state.

• CT integrates testing into the CI/CD pipeline for faster feedback loops.

• Examples include running unit tests, integration tests, and end-to-end tests a...read more

Git reflog is a reference log that records changes to the HEAD of the repository.

• Records all changes to the HEAD reference

• Useful for recovering lost commits or branches

• Can be accessed using 'git reflog' command

Load average in Linux is a measure of system activity, indicating the average number of processes waiting for CPU time over a period of time.

• Load average is displayed as three numbers representing the average load over the last 1, 5, and 15 minutes.

• A load average of 1.0 means the system is at full capacity, while a load average of 0.5 means the system is half as busy.

• High load averages may indicate that the system is overloaded and may require optimization or additional resou...read more

Kubernetes Load Balancing is a method to distribute incoming network traffic across multiple pods in a Kubernetes cluster.

• Kubernetes Load Balancer service type automatically creates a cloud provider load balancer.

• It helps in scaling applications by distributing traffic evenly across multiple pods.

• Load balancing ensures high availability and reliability of applications running in a Kubernetes cluster.

The VPN port used for UDP is typically 500.

• The VPN port used for UDP is usually port 500.

• UDP is a protocol that allows for faster transmission of data but does not guarantee delivery or order of packets.

• Port 500 is commonly used for IPsec VPNs, which provide secure communication over the internet.

• Other VPN protocols may use different ports for UDP, so it's important to check the specific configuration.