CI/CD pipeline basics in Node.js - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does CI/CD stand for in software development?

CI/CD stands for Continuous Integration and Continuous Delivery (or Continuous Deployment). It is a method to frequently deliver apps to customers by introducing automation into the stages of app development.

beginner

What is the main goal of Continuous Integration (CI)?

The main goal of CI is to merge all developers' working copies to a shared mainline several times a day to detect problems early and improve software quality.

intermediate

What is the difference between Continuous Delivery and Continuous Deployment?

Continuous Delivery means the code is always ready to be released but requires manual approval to deploy. Continuous Deployment automatically releases every change that passes tests to production without manual intervention.

beginner

Name a common tool used to automate CI/CD pipelines in Node.js projects.

Jenkins, GitHub Actions, GitLab CI, and CircleCI are popular tools to automate CI/CD pipelines for Node.js projects.

beginner

Why is automated testing important in a CI/CD pipeline?

Automated testing ensures that new code changes do not break existing functionality. It helps catch bugs early and maintains software quality throughout the pipeline.

What is the first step in a typical CI/CD pipeline?

A Code commit and integration

B Deployment to production

C Manual testing

D User feedback collection

The pipeline starts when developers commit code changes which triggers integration and further automated steps.

Which of the following best describes Continuous Delivery?

A Automatically deploying every change to production

B Keeping code ready to deploy with manual release

C Writing code without testing

D Manual code integration

Continuous Delivery means code is always ready to deploy but requires manual approval before release.

In a Node.js CI/CD pipeline, which tool can be used to run automated tests?

A npm test

B docker build

C git push

D ssh login

The command 'npm test' runs automated tests defined in a Node.js project.

Why is automation important in CI/CD pipelines?

A To increase manual work

B To delay deployment

C To avoid testing

D To reduce manual errors and speed up delivery

Automation reduces human errors and speeds up the software delivery process.

What triggers a CI/CD pipeline in most setups?

A Manual email

B User login

C Code commit to version control

D Server restart

A code commit to a version control system like Git usually triggers the pipeline.

Explain the main stages of a CI/CD pipeline and their purpose.

Think about what happens from writing code to delivering it to users.

Describe how automated testing fits into the CI/CD process and why it matters.

Consider the role of tests in catching problems before deployment.