Top 10 Must-Know DevOps Interview Questions for Continuous Integration and Delivery

Continuous integration (CI) and continuous delivery (CD) are essential parts of DevOps. Mastering them can help you in your next DevOps interview. Below are the top 10 must-know questions for CI/CD.

1. What is CI/CD in DevOps?
2. Explain the role of version control systems in CI/CD.
3. What is the difference between continuous deployment and continuous delivery?
4. How do you handle failed builds in CI?
5. How would you implement a CI/CD pipeline from scratch?
6. What tools have you used for CI/CD?
7. What is the role of Docker in CI/CD?
8. How do you ensure security in CI/CD pipelines?
9. Explain rollback strategies in CD.
10. What is blue-green deployment in CD?

These questions cover the essentials of CI/CD. Here is a simple Python script for a CI pipeline:

import subprocess

def run_tests():
    result = subprocess.run(["pytest", "tests/"], capture_output=True)
    if result.returncode != 0:
        print("Tests failed!")
        return False
    print("All tests passed!")
    return True

if __name__ == "__main__":
    if run_tests():
        print("Ready for deployment!")
    else:
        print("Fix the issues and try again.")