The adjacency list uses a two-dimensional ____ array to store the edges.

A __________ virus is explicitly designed to hide itself from detection by anti-virus software.

Fill in the blank(s) with the appropriate word(s).

In regards to a user account, what does a white circle with a black arrow indicate?

A. The account is locked. B. The account is disabled. C. It is a guest account. D. It is corrupted and needs attention.