20. What does the PHP function touch() do?

Which PHP function is used to change file permissions?

A). chmod()

B). chown()

C). chgrp()

D). umask()

What PHP function creates a directory?

A). mkdir()

B). create_directory()

C). newdir()

D). dir_create()

What is the purpose of the PHP function is_file()?

A). Checks if a path is a regular file

B). Checks if a path is a directory

C). Checks if a file is writable

D). Checks if a file is readable

Which superglobal variable in PHP is used to handle file uploads?

A). $_FILES

B). $_POST

C). $_GET

D). $_REQUEST

Which PHP function checks if a file or directory exists?

A). file_exists()

B). is_file()

C). exists()

D). check_file()

What attribute is required in HTML forms for file uploads?

A). enctype='multipart/form-data'

B). method='file'

C). enctype='application/x-www-form-urlencoded'

D). enctype='text/plain'

What PHP function is used to delete a file?

A). unlink()

B). remove()

C). delete()

D). file_delete()

What is the purpose of the PHP function umask()?

A). Sets the default file permissions for new files

B). Changes file ownership

C). Checks file existence

D). Removes a file

Which PHP function is used to handle file uploads?

A). move_uploaded_file()

B). copy()

C). rename()

D). fopen()

Which PHP function retrieves the last modified time of a file?

A). filemtime()

B). file_lastmod()

C). last_modified()

D). mod_time()