A print server uses a print ________ as a software holding area for jobs waiting to be printed

Which of the following is not a valid operation on a structure?

a) Assigning structure variables to structure variables of the same type. b) Taking the address of a structure variable. c) Using the sizeof operator to determine the size of a structure variable. d) Comparing structures of the same type with relational operators.

What is the value in x after line 6 is run?

``` 1 string s, t; 2 s = “Get up and go to school!”; 3 t = “NO!”; 4 int n = s.size(); 5 int w = s.at(3); 6 int x = s.at(12); 7 s += t; 8 cout << s; ``` A. g B. o C. space ‘ ‘ D. s