CAD CAD Continuous Integration and Delivery Questions and Answers 2 — Questions and Answers
Question 1: What is the primary purpose of a build pipeline in continuous integration?
- To deploy code directly to production without testing
- To automate the process of compiling, testing, and packaging code changes (Correct answer)
- To replace manual code reviews entirely
- To manage project documentation updates
Correct answer: To automate the process of compiling, testing, and packaging code changes
A build pipeline automates compiling, running tests, and packaging code so that integration issues are detected quickly and consistently.
Question 2: In a CI/CD workflow, what does 'trunk-based development' emphasize?
- Maintaining long-lived feature branches for stability
- Developers committing to a single shared branch frequently (Correct answer)
- Avoiding merges until the end of a sprint
- Using separate repositories for each team
Correct answer: Developers committing to a single shared branch frequently
Trunk-based development encourages frequent commits to a single main branch to reduce merge conflicts and enable continuous integration.
Question 3: Which practice helps ensure that a deployment can be safely rolled back in a continuous delivery pipeline?
- Deleting previous build artifacts after each deployment
- Using blue-green or canary deployment strategies (Correct answer)
- Disabling monitoring during deployments to reduce noise
- Deploying only during weekends when traffic is low
Correct answer: Using blue-green or canary deployment strategies
Blue-green and canary deployments allow quick rollback by maintaining a previous stable environment alongside the new release.
Question 4: What is a 'flaky test' in the context of continuous integration?
- A test that consistently fails due to a known bug
- A test that produces inconsistent pass/fail results without code changes (Correct answer)
- A test that runs too slowly to include in the pipeline
- A test written without assertions
Correct answer: A test that produces inconsistent pass/fail results without code changes
A flaky test intermittently passes or fails on the same code, undermining confidence in CI results and slowing down development.
Question 5: Why should database schema migrations be backward-compatible in a continuous delivery environment?
- Because databases cannot handle schema changes during uptime
- To allow the previous application version to function during a rolling deployment (Correct answer)
- To avoid needing automated testing for database changes
- Because agile teams never modify database schemas
Correct answer: To allow the previous application version to function during a rolling deployment
Backward-compatible migrations ensure that both old and new application versions can run simultaneously during a rolling or staged deployment.
Question 6: What role does a container registry play in a CI/CD pipeline?
- It stores and versions built container images for consistent deployment across environments (Correct answer)
- It replaces the need for version control systems
- It monitors application performance in production
- It manages developer access permissions to the codebase
Correct answer: It stores and versions built container images for consistent deployment across environments
A container registry stores versioned container images so that the exact same artifact built in CI can be deployed consistently to any environment.
CAD CAD Continuous Integration and Delivery Questions and Answers 2
What is the primary purpose of a build pipeline in continuous integration?