Q1

Which statement about bits and bytes is correct?

A: A bit is one binary digit, and a byte commonly contains eight bits B: A byte is one binary digit C: A bit always stores an entire character D: A byte contains two decimal digits

Q2

What is the 8-bit two's-complement representation of -5?

A: 00000101 B: 11111010 C: 10000101 D: 11111011

Q3

The diagram shows two inputs entering an AND-shaped gate followed by an inversion bubble. Which logic operation is represented?

A: NOR B: NAND C: XOR D: AND

Q4

For the multiplexer shown, how many distinct data inputs can be selected?

A: 2 B: 3 C: 4 D: 8

Q5

Clock speed is best described as the

A: number of processor clock cycles completed per second B: amount of permanent storage installed C: number of instructions stored in memory D: rate at which a printer produces pages

Q6

What does the following instruction sequence accomplish?

I. LOAD X

II. ADD Y

III. STORE Z

A: Copies the value in Z into X B: Compares the values stored in X and Y C: Adds the contents of X and Y and stores the result in Z D: Multiplies the contents of X and Y

Q7

Which number system is used internally by a digital computer to represent instructions and data?

A: Decimal B: Octal C: Hexadecimal D: Binary

Q8

A workstation must continue operating long enough to save open files after a brief power failure. Which device is most appropriate?

A: Surge suppressor B: Uninterruptible power supply C: Voltage regulator D: Network switch

Q9

Which is a typical use of registers in a processor?

A: Holding current instructions and intermediate results B: Providing permanent archival storage C: Connecting the computer to a network D: Producing printed output

Q10

How many selection lines are required for an 8-to-1 multiplexer?

A: 1 B: 2 C: 4 D: 3

CAPE Computer Science