Linux operating system multiple choice file permissions

knowledge points	title	Answer	Option A	option B	Option C	option D
File Permissions	The access authority of the file file1 is rw-r--r--, now you want to increase the execution authority of all users and the write authority of users in the same group, the following commands are correct	A	chmod a+x g+w file1	chmod 765 file1	chmod o+x file1	chmod g+w file1
File Permissions	The command to change the file owner is	C	chmod	touch	chown	cat
File Permissions	If the permission of members outside the group of a file is read-only; the owner has full permission; the permission of the group is read and write, then the permission of the file is	D	467	674	476	764
File Permissions	The access authority of the file xx is 744, and the execution authority of the owner of the file should be cancelled, and the write authority of the group belonging to the file should be increased, and the other groups should remain unchanged. Which of the following commands is correct ( )	D	chmod 666 xx	chmod 777 xx	chmod u+w xx chmod g+w xx	chmod u-x xx chmod g+w xx
File Permissions	The access authority of file xx is rw-r--r--, now you want to increase the execution authority of all users and the write authority of users in the same group, the following command is correct ( ).	C	chmod a+x g+w xx	chmod o+x xx	chmod 775 xx	chmod g+w xx
File Permissions	The following characters that do not represent permissions for file or directory access are ( )	D	r	x	w	e
File Permissions	What does the directory permission 511 mean to other people (not the directory owner)?	B	viewable	can enter	readable, executable	writable
File Permissions	Which is the default access right for new directories created by normal users? ( )	A	rwxr-xr-x	rw-rwxrw-	rwxrw-rw-	rwxrwxrw-
File Permissions	There are users user1 and user2 in the system, both belong to the users group. There is a file file1 in the user directory of user1, which has the authority of 644. If user2 wants to modify the file1 file in the user directory of user1, should it have ( ) authority?	B	744	664	646	746