____ are systems in which queues of objects are waiting to be served by various servers.

The ________ tool enables you to create a user-interface which works on the Internet

Fill in the blank(s) with correct word

What is displayed by the C++ statements that follow if the value input is 0?

``` cin >> color; switch (color) { case 0: case 1: cout << "red "; case 2: cout << "blue "; case 3: cout << "green "; case 4: cout << "yellow "; } cout << endl; ``` a. no output b. red c. yellow d. red blue green yellow