Continuous Integration and Continuous Deployment (CI/CD)

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Continuous Integration and Continuous Deployment (CI/CD) is a practice in Agile methodology that encourages developers to integrate their work frequently and automate the testing and deployment processes. This approach ensures that code changes are more manageable, minimizes risks associated with traditional deployment methods, and accelerates the delivery of products and services. Continuous Integration involves regular integration of code into a shared repository, along with automated testing, which helps identify and resolve defects promptly. Continuous Deployment covers deploying code changes to production automatically, ensuring that software is always in a release-ready state. CI/CD practices enhance the overall efficiency, quality, and reliability of software products in an Agile environment.

Guide: Continuous Integration and Continuous Deployment (CI/CD)

Continuous Integration and Continuous Deployment (CI/CD) is a vital part of Agile Project Management. It's a set of practices that involves the regular integration of code changes, automated testing, and quick deployment to production.

Why it is important: CI/CD accelerates software delivery, improves code quality, and reduces the risk of severe integration conflicts. It also allows developers to respond promptly to business requirements.

What it is: CI is the practice of merging all developers' working copies to a shared mainline several times a day. It helps detect integration issues early. CD is the ability to get changes to users quickly and sustainably. This is done through two types: Continuous Delivery and Continuous Deployment.

How it works: Developers push code changes to a version control repository (like Git). Then, automated build and test processes run. If tests pass, the process either deploys the changes to production automatically (Continuous Deployment) or awaits approval for deployment (Continuous Delivery).

Exam Tips: Answering Questions on CI/CD: Understand the differences between CI, CD, and DevOps. Be able to explain the advantages and disadvantages of CI/CD. Understand the typical automation tools used in CI/CD such as Jenkins, Travis CI, and CircleCI. Remember that CI/CD is part of a larger DevOps culture of collaboration.

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Question 1

Developers in the team are often waiting for manual testing to be completed before they can integrate and deploy new features. What action should the team take to speed up the process?

Implement Automated Testing in Continuous Integration Perform tests once per month Redefine Definition of Done Hire more manual testers Reduce the amount of testing Switch to longer release cycles

Correct Answer: Implement Automated Testing in Continuous Integration

Implementing automated testing in the Continuous Integration pipeline allows for faster and more reliable feedback, enabling developers to integrate and deploy features more quickly without compromising the quality.

Question 2

Your company's software development team is looking to automate the process of testing and deploying their applications. Which of these practices would be suitable to achieve this?

Burndown Chart Behavior Driven Development Continuous Deployment Agile Modeling Incremental Development Task Board

Correct Answer: Continuous Deployment

Continuous Deployment is the practice of automatically deploying every code change to production after passing a series of automated tests, thereby reducing the time between code integration and deployment.

Question 3

Your team deployed a new feature to production. However, you discovered a critical bug that could not be detected by automated tests. What is the best CI/CD practice to deal with this issue?

Remove the automated tests from the pipeline Ignore the issue and document it for future reference Rollback or perform a forward fix and conduct a post-mortem analysis to prevent a similar issue in the future Manually patch the production environment Ask the developers to avoid this kind of bug in the future Wait for users to report the issue

Correct Answer: Rollback or perform a forward fix and conduct a post-mortem analysis to prevent a similar issue in the future

The best practice is to rollback to a previous stable state or perform a forward fix and conduct a post-mortem analysis to identify the root cause and come up with improvements to prevent such issues in the future.

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