CCAR-F objective 2.5 · Domain 2 · 18% of the exam

Built-in Tools

Glob finds files by name, Grep finds lines inside them, and the difference that decides an item is that Glob ignores .gitignore while Grep respects it, so only one of them turns up a build artefact. Grep is built on ripgrep rather than POSIX grep, which changes how metacharacters are escaped. On the writing side, an edit must pass three checks: the file has been read, the old string matches exactly, and it appears exactly once. When the anchor is not unique the fix is a longer anchor or replace_all. Falling back to rewriting the whole file discards concurrent changes.