Interview Questions and Answers

Continuous Integration is a development practice where developers integrate code into a shared repository frequently, preferably several times a day. Each integration is verified by automated build and test scripts.

Continuous Deployment is the practice of automatically deploying every change that passes automated testing into production, making the entire process of deploying code to production automated and efficient.

Docker is a containerization platform that allows developers to package applications and their dependencies into containers. It enables consistent and reproducible deployment across different environments.

Infrastructure as Code is the practice of managing and provisioning computing infrastructure through machine-readable script files, rather than through physical hardware configuration or interactive configuration tools.

Jenkins is an open-source automation server that supports building, testing, and deploying code. It facilitates continuous integration and continuous delivery by automating the building and testing of code.

In Blue-Green Deployment, two environments (Blue and Green) are maintained, with only one active at a time. In Canary Deployment, a new version of the software is gradually rolled out to a subset of users.

Configuration Management involves managing and tracking changes to software and infrastructure configurations. It ensures consistency and enables reproducibility in different environments.

Microservices architecture is an approach to software development where a large application is broken down into small, independent services that communicate through well-defined APIs. It promotes flexibility and scalability.

A DevOps pipeline is a set of automated processes that facilitate the continuous integration, testing, and delivery of software. It typically includes build, test, and deployment stages.

Horizontal scaling involves adding more machines to a network to handle increased load, while vertical scaling involves increasing the power of existing machines.

Terraform is used for provisioning and managing infrastructure in a declarative and version-controlled way. It supports multiple cloud providers and on-premises infrastructure.

A Reverse Proxy is used to handle incoming client requests and distribute them to backend servers. It improves security, performance, and scalability.

Blue-Green Deployment allows for a seamless switch between environments. In case of issues in the new version (Green), reverting to the previous version (Blue) is quick, minimizing downtime.

Ansible is an open-source automation tool that automates configuration management, application deployment, and task automation. It uses a simple, human-readable language.

Version Control Branches allow developers to work on features or bug fixes independently. It enables parallel development, isolation of changes, and easy integration of code.

A Proxy Server acts as an intermediary between client and server, forwarding requests and responses. It can be used for security, caching, and load balancing.

Chef is an automation platform that manages infrastructure as code. It defines infrastructure policies as code, allowing for automated configuration and deployment.

Gitflow is a branching model that defines a set of rules for organizing branches in a Git repository. It helps in managing features, releases, and hotfixes in a structured way.

IaC testing ensures that the code used to provision and manage infrastructure is reliable and error-free. It includes testing for syntax, compliance, and functionality.

Continuous Monitoring involves real-time tracking of application and infrastructure performance. It helps detect and address issues promptly, ensuring optimal system health.

Canary Analysis involves releasing a new version of the software to a small subset of users to gather feedback and assess its impact before a full deployment. It helps minimize risks.

GitOps is an operational model that uses Git as a single source of truth for infrastructure and application configurations. Changes to the system are made through Git commits.

Log Aggregation involves collecting and centralizing log data from various sources in a single location. It simplifies troubleshooting, analysis, and monitoring of system events.

Blueprints in IaC are predefined templates or scripts used to provision and configure infrastructure. They provide a standardized and repeatable way to create resources.

Rolling Deployment is a strategy where updates are applied to servers one at a time, gradually replacing the old version with the new one. It minimizes downtime.