Hotspot Question You use Git for source control. You need to optimize the performance of a repository. The solution must meet the following requirements: - Permanently remove all items referenced only

Question

Exhibit

Answer Area

• git [dropdown] expire --expire-unreachable=now --allreflog
  gcreflogresetstash
• git [dropdown] --prune=gc
  gcinitreflogreset
• --prune=[dropdown]now
  allnowresettrue

Explanation

This question tests knowledge of Git garbage collection commands used to optimize repository performance by removing unreferenced objects and stale reflog entries.

Approach. The correct command is: 'git gc --prune=now' combined with first expiring the reflog using 'git reflog expire --expire=now --all'. To permanently remove all items referenced only in the reflog, you use 'git reflog expire --expire=now --all' which expires all reflog entries immediately. Then 'git gc --prune=now' runs garbage collection and prunes all loose objects that are not reachable from any reference, including those just removed from the reflog. The '--prune=now' flag removes objects immediately rather than waiting for the default 2-week grace period, ensuring history not in any current branch is fully removed.

Concept tested. Git repository optimization using 'git reflog expire --expire=now --all' to clear reflog entries and 'git gc --prune=now' to perform immediate garbage collection and removal of unreachable objects. Understanding the difference between the default grace period pruning and immediate pruning with '--prune=now' is key.

Reference. https://git-scm.com/docs/git-gc | https://git-scm.com/docs/git-reflog

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