(a)
(b) Password/PIN (1). Biometrics (Fingerprint/Face) (1). Pattern Swipe (1).
(a) Admin sets 'Access Rights' for groups (1). Teachers get Write/Delete access (1). Students get Read-Only access (1).
(b) Keeps data/settings separate for each user (1). Provides privacy (1).
/ or \ in filenames? [2]
(c) Purpose of file extensions (e.g. .docx). [2]
(a) Organises files logically (1). Makes finding files faster/easier (1).
(b) Reserved characters (1). Used for file paths/directory separators (1).
(c) Identifies file type (1). Tells OS which software to open it with (1).
(a) Restores accidentally deleted files.
(b) Actual data remains on disk (1). Only the reference/pointer is deleted (1). Remains until overwritten (1).