Git Pathspec Quiz: glob, top, literal and exclude

Git Pathspec Quiz: glob, top, literal and exclude

Choose one answer. Each attempt draws 10 of 20 questions; the practice pass mark is 8/10. Original topic practice, not an official exam. Interpret quoted pathspecs for read-only Git commands and distinguish them from shell globs.
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In git ls-files -- ':(top)src/app.ts', what does top mean?