Which statement best describes rollback?

Which statement best describes rollback?

• A. Rollback is the same as committing changes.
• B. Rollback creates new branches.
• C. Rollback optimizes code.
• D. Rollback refers to undoing uncommitted changes.

Answer: (D)

Rollback means undoing changes that haven’t been finalized yet. When you’re working on something and decide you don’t want to keep the recent edits, you roll back to the previous stable state, discarding those uncommitted changes. This is different from committing, which saves the changes as a new baseline you’ve accepted. It’s also not about creating new branches or optimizing code; those are separate actions. In databases, for example, a rollback cancels all operations in the current transaction, restoring the state from before the transaction began. So the statement that rollback refers to undoing uncommitted changes captures the essential idea.

Rollback means undoing changes that haven’t been finalized yet. When you’re working on something and decide you don’t want to keep the recent edits, you roll back to the previous stable state, discarding those uncommitted changes. This is different from committing, which saves the changes as a new baseline you’ve accepted. It’s also not about creating new branches or optimizing code; those are separate actions. In databases, for example, a rollback cancels all operations in the current transaction, restoring the state from before the transaction began. So the statement that rollback refers to undoing uncommitted changes captures the essential idea.