Answer: Utilizing version control systems to revert the pipeline's code and configurations to a previous stable version that was functioning correctly before the update.

**Correct Option: B. Utilizing version control systems to revert the pipeline's code and configurations to a previous stable version that was functioning correctly before the update.** **Explanation:** Version control is indispensable in modern software and data pipeline management, allowing teams to track every change made to the codebase and configurations. In the event of a problematic update, version control enables a quick and efficient rollback to a previously known stable state, minimizing downtime and ensuring data integrity. This approach is proactive and systematic, addressing the root cause of the issue by reverting to a version that was verified to work correctly. **Why other options are incorrect:** - **A. Scaling up the pipeline resources to handle the increased load caused by the faulty update:** This might temporarily mitigate performance issues but does not address the underlying problem introduced by the update. It's a reactive measure that can lead to unnecessary costs without solving the issue. - **C. Deleting the current pipeline and attempting to recreate it from scratch based on documentation, which may not be up-to-date:** This approach is risky and time-consuming. Documentation may not accurately reflect the current state or all custom configurations, leading to potential loss of functionality or data. - **D. Switching to a different data source that is not affected by the update, hoping it resolves the issue without addressing the root cause:** This is a workaround that may not be feasible or effective, especially if the issue lies within the pipeline's code or configuration rather than the data source itself. It avoids solving the actual problem and may introduce new issues.

Author: LeetQuiz Editorial Team