You are extending a logical volume. To do this, you have to add the /dev/xvdj device to the volume group "battlestar". Which command would you issue to accomplish this task?

• A. lvextend battlestar /dev/xvdj
• B. vgextend battlestar /dev/xvdj
• C. vgresize battlestar /dev/xvdj
• D. pvcreate battlestar /dev/xvdj

Answer: (B)

In LVM, to incorporate a new device into an existing volume group, you extend the volume group by adding the device as a physical volume with vgextend. This updates battlestar to include the extra space from /dev/xvdj, making it usable by any logical volumes within that group. The command you’d issue is vgextend battlestar /dev/xvdj. After that, you can expand a specific logical volume with lvextend if needed.

The other options don’t fit: lvextend targets a logical volume, not the volume group; vgresize isn’t a valid LVM command; pvcreate initializes a device as a physical volume (you’d run pvcreate /dev/xvdj first, then vgextend battlestar /dev/xvdj).