____________________ was based on the UNIX operating system and originally set the standard for graphical user interfaces.

A __________ processes the input elements continuously, producing output one element at a time.

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

Which one of the conditions that follow will be false (value of 0) after execution of the program segment below?

``` int v[5] = {0, 0, 0, 0, 1}; int k, j; for (j = 3; j >= 0; --j) for (k = j; k < 4; ++k) v[k] += v[k + 1]; ``` a. v[0] == v[4] b. v[1] == v[3] c. v[0] < v[1] d. v[1] < v[2] e. v[2] < v[3]