Use the _______ command to verify installed device drivers if you have unexplained computer problems

To stack elements, you can use the ____ style.

A. index B. layer C. z-layer D. z-index

A user reports that she was working on an important script when the system rebooted at approximately 6:30 P.M. last night. No warning was given. How can you find out who was logged into the system at that time and who could have rebooted the system without warning?

a. last b. first c. who d. whoami