Which of the following is used to serve as an emergency backup line to troubleshoot a broadband connection on many routers?

When you declare an array name, no computer memory address is assigned to it. Instead, the array variable name has the special value ____, or Unicode value ‘\u0000'.

A. empty B. null C. false D. zero

For shell sort, it has been suggested that we should not start with an increment greater than ____ of the list size.

A. one third B. one half C. two thirds D. three fourths