What is the BFG Repo-Cleaner used for?

• A. A code formatter.
• B. A tool used to scrub sensitive data from your repo.
• C. A Git hosting service.
• D. A static analysis tool.

Answer: (B)

BFG Repo-Cleaner is used to scrub sensitive data from your Git history. It rewrites past commits to remove secrets like passwords or API keys, or to delete large files that shouldn’t be in the repository, so that they no longer exist anywhere in the history. It’s designed to be fast and easy, often preferred over older methods for cleaning up a repo’s history. After running it on a mirrored clone, you reset and repack the repository and push the rewritten history.

It’s not a code formatter, not a Git hosting service, and not a static analysis tool, so those options don’t fit what BFG does.