QUESTION 36

A section of a program that should be executed by at most one process at a time is called a

Interrept

Utility

Critical region

Privileged instruction

2.5 points

QUESTION 37

Let A = { 1, 2, 3 }

How many tuples are in the Cartesian product AxA ?

6

12

23

32

2.5 points

QUESTION 38

Which of the following is the answer to the following logic problem

11010

XOR 10010

00100

10111

01000

01010

2.5 points

QUESTION 39

Given the two relations X and Y below

X: A B Y: C D

7 s t 3

2 z r 2

what value would be retrieved by executing the following SQL statement?

SELECT Y.C FROM X, Y WHERE X.A < Y.D

z

r

s

t

2.5 points

QUESTION 40

Suppose a binary tree contained the nodes A, B, C, D and E. If A and B were children of C, and D had no children, which node would be the root?

B

E

C

None of the above