// Exercise 4.16: Mystery. java 2 public class Mystery
3 {
4 public static void main(String[] args)
5 {
6 int x = 1;
7 int total = 0;
8
9 while (x <= 10)
10 {
11 int y = x * x;
12 System. out. println(y);
13 total += y;
14 ++x;
15 }
16
17 System. out. printf("Total is %d%n", total);
18 }
19 } // end class Mystery

David is in week 3 of his current ashford course and has a paper due by monday night at midnight. he has finished everything but the concluding paragraph. as he boots up his computer to work on it, he sees a flash across the screen and then the screen goes black. he begins to panic as he tries desperately to turn the laptop back on. david should have saved his work on what kind of portable device?

What statement best describes operating systems? it’s possible for modern computers to function without operating systems. most operating systems are free or very inexpensive. operating systems are managed by the computer’s microprocessor (cpu). operating systems manage the computer’s random access memory (ram).

What is domain name system (dns)? allows dynamic ip address allocation so users do not have to have a preconfigured ip address to use the network converts ip addresses into domains, or identifying labels that use a variety of recognizable naming conventions the efficient coexistence of telephone, video, and data communication within a single network, offering convenience and flexibility not possible with separate infrastructures the integration of communication channels into a single service