Question 1

The symbol below most likely represents a _________.

Accepted Answer

A)  multiplexer 
B)  demultiplexer 
C)  comparator 
D)  full- adder

Question 2

-The output of the decoder in Figure 6- 3 will be 1 only when ________.

Accepted Answer

A)  A = 0, B = 0, C= 0, D = 0 
B)  A = 0, B = 1, C= 0, D = 1 
C)  A = 1, B = 1, C= 1, D = 1 
D)  A = 1, B = 0, C= 1, D = 0

Question 3

-The symbol in Figure 6- 2 represents a(n)_________.

Accepted Answer

A)  half- adder 
B)  And function 
C)  full- adder 
D)  PLD

Question 4

A group of four bits is called a byte.

Accepted Answer

A) True 
 B)False

Question 5

The look- ahead- carry adder is slower than the ripple- carry adder because it requires additional logic circuits.

Accepted Answer

A) True 
 B)False

Question 6

The function  can be decoded with _________.

Accepted Answer

A)  two 2- input OR gates and two inverters 
B)  one 4- input AND gate and one inverter 
C)  one 4- input AND gate and two inverters 
D)  two 2- input OR gates and one inverter

Exam 6: Functions of Combinational Logic

The symbol below most likely represents a _________.

-The output of the decoder in Figure 6- 3 will be 1 only when ________.

-The symbol in Figure 6- 2 represents a(n) _________.

A group of four bits is called a byte.

The look- ahead- carry adder is slower than the ripple- carry adder because it requires additional logic circuits.

The function can be decoded with _________.