GROL Digital Logic and Microcomputers 2

Question 1

What is the output of an XNOR gate when both inputs are logic 1?

Accepted Answer

Logic 1

Answer

Logic 0

Answer

High impedance

Answer

Undefined

Question 2

Which Boolean expression represents De Morgan's theorem applied to the expression NOT(A AND B)?

Accepted Answer

NOT(A) OR NOT(B)

Answer

NOT(A) AND NOT(B)

Answer

A OR B

Answer

A AND B

Question 3

A NAND gate with all inputs tied together functions as which logic gate?

Accepted Answer

NOT gate (inverter)

Answer

AND gate

Answer

OR gate

Answer

XOR gate

Question 4

In a sum-of-products (SOP) Boolean expression, terms are combined using which operation at the top level?

Accepted Answer

OR

Answer

AND

Answer

NOT

Answer

XOR

Question 5

What is the hexadecimal equivalent of binary 1010 1111?

Accepted Answer

AF

Answer

A9

Answer

BF

Answer

AE

Question 6

Which type of logic circuit has outputs that depend only on the current inputs, with no memory or feedback?

Accepted Answer

Combinational logic

Answer

Sequential logic

Answer

Synchronous logic

Answer

Asynchronous logic

Question 7

What is the two's complement representation of -7 in an 8-bit system?

Accepted Answer

11111001

Answer

10000111

Answer

11111000

Answer

01111001