Test your knowledge: os.scandir()

Review

1. What does os.scandir(path) yield?

   scandir() yields DirEntry objects for entries directly inside the selected directory.
2. Which statement about entry order is correct?

   Sort the names or paths yourself when stable output is required.
3. Why is `with os.scandir(path) as entries:` recommended?

   The iterator supports the context-manager protocol and is closed when the with block exits.
4. Why can entry.is_file() be efficient in common cases?

   DirEntry can expose type metadata supplied during scanning, though method calls can still perform system calls.
5. What does entry.is_file() do by default when the entry is a symbolic link to a regular file?

   The default follow_symlinks=True checks the target; use False to classify the entry itself.
6. An entry.stat() result may be cached. What should code do when it needs a fresh status query?

   A new os.stat() call requests current metadata, though the filesystem can still change afterward.
7. When can OSError arise in a scandir workflow?

   The scan itself and some DirEntry methods may fail due to permissions or filesystem changes.
8. Which statement about DirEntry.path is accurate?

   DirEntry.path is normally str when a str path is supplied, and DirEntry supports the path-like protocol.
9. Does a single os.scandir(root) call scan nested directories automatically?

   scandir() scans the selected directory; use an intentional tree-walking API for recursive traversal.