1. ► su command cannot be run by a normal user.

2. ► rm -rf foo will delete ./foo/--a file without generating an error?

3. ► less is an editor.

4. ► Giving a directory an 'execute' permission is enough for one to be able to list its contents.

5. ► Can an executable have an extension to .txt in UNIX?

6. ► The magic number database necessarily looks at the initial few bytes only?

7. ► stdin, stdout and stderr are limited to 'C' programs only.

8. ► I can create a directory '--a' as mkdir --a?

9. ► ls -lR and find ./ give identical output?

10. ► du -sh and du -sH are identical.