Question 1

The output from a logic gate changes at the same instant that the input to the gate changes.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following is NOT a basic Boolean operation?

Accepted Answer

A)  NOT 
B)  AND 
C)  OR 
D)  FOR 
A)  NOT 
B)  AND 
C)  OR 
D)  FOR

Question 3

-If we use DeMorgan's theorem to simplify the output expression for the circuit in Figure 3-1, we get:

Accepted Answer

A)    
B)  Y = AB +   
C)  Y =   
D)  Y =    
A)    
B)  Y = AB +   
C)  Y =   
D)  Y =

Question 4

The output expression for the circuit in Figure 3- 2 is Y =

Accepted Answer

A) True 
 B)False

Question 5

To change a logic gate to its alternate representation, a simple three- step process is followed.

Accepted Answer

A) True 
 B)False

Question 6

An inverted output NAND gate is called a(n)_______ 	gate.

Accepted Answer

The answer of An inverted output NAND gate is called...

Question 7

A logic control system in an automobile generates an audible alarm when any one, two, or three of the following three conditions occur: 1. The ignition is off but the ignition key has not been removed from the switch and a door is opened.
 2. The headlamp switch is on with the ignition off and the key removed from the switch.
 3. The ignition is on with the engine running but the driver's seatbelt has not been fastened.
 Detection circuits generate HIGH inputs to a 3- input logic gate when any of these conditions occurs. The logic gate responds to the high input(s) by generating a HIGH output that triggers the alarm. The 3- input logic gate is most likely a(n):

Accepted Answer

A)  OR gate. 
B)  NOR gate. 
C)  Inversion device. 
D)  AND gate. 
A)  OR gate. 
B)  NOR gate. 
C)  Inversion device. 
D)  AND gate.

Question 8

The output from a_______	gate is HIGH (1) only when all inputs are LOW (0).

Accepted Answer

The answer of The output from a_______	gate is HIGH (1)...

Question 9

Which of the following accurately describes the logic circuit for the Boolean expression AB + BCD?

Accepted Answer

A)  A 2- input NAND gate and 3- input NAND gate whose outputs are fed to a 2- input OR gate. 
B)  A 2- input AND gate and a 3- input AND gate whose outputs are fed to a 2- input NOR gate. 
C)  A 2- input OR gate and a 3- input OR gate whose outputs are fed to a 2- input AND gate. 
D)  A 2- input NOR gate and a 3- input NOR gate whose outputs are fed to a 2- input AND gate. 
A)  A 2- input NAND gate and 3- input NAND gate whose outputs are fed to a 2- input OR gate. 
B)  A 2- input AND gate and a 3- input AND gate whose outputs are fed to a 2- input NOR gate. 
C)  A 2- input OR gate and a 3- input OR gate whose outputs are fed to a 2- input AND gate. 
D)  A 2- input NOR gate and a 3- input NOR gate whose outputs are fed to a 2- input AND gate.

Question 10

The output of a three input (A, B, and C) AND gate is connected to a two input OR gate. A second input to the OR gate is labeled D. The Boolean expression representing this logic circuit is:

Accepted Answer

A)  X = ABC + D 
B)  X = (A + B + 
C)  + D 
C)  X = (AB
C) D 
D)  X = (A + B + 
C)  D 
A)  X = ABC + D 
B)  X = (A + B + 
C)  + D 
C)  X = (AB
C) D 
D)  X = (A + B + 
C)  D

Question 11

74LS00 is a:

Accepted Answer

A)  Quad 2- input AND gate. 
B)  Quad 2- input OR gate. 
C)  Single 8- input OR gate. 
D)  Quad 2- input NAND gate. 
A)  Quad 2- input AND gate. 
B)  Quad 2- input OR gate. 
C)  Single 8- input OR gate. 
D)  Quad 2- input NAND gate.

Question 12

Which of the following statements best describes the function of the logic variable X?

Accepted Answer

A)  X is a variable whose value is always 1. 
B)  X is a variable whose value is 1 or 0. 
C)  X is a constant value in the indeterminate range of logic values. 
D)  X is a variable whose value is always 0. 
A)  X is a variable whose value is always 1. 
B)  X is a variable whose value is 1 or 0. 
C)  X is a constant value in the indeterminate range of logic values. 
D)  X is a variable whose value is always 0.

Question 13

The alternate logic symbol for an AND gate would have:

Accepted Answer

A)  bubbles only on its output. 
B)  bubbles only on its inputs. 
C)  no bubbles on its inputs or outputs. 
D)  bubbles on its inputs and outputs. 
A)  bubbles only on its output. 
B)  bubbles only on its inputs. 
C)  no bubbles on its inputs or outputs. 
D)  bubbles on its inputs and outputs.

Question 14

How many NAND gates would be required to perform the OR operation if two inputs are required?

Accepted Answer

A)  two 
B)  one 
C)  four 
D)  three 
A)  two 
B)  one 
C)  four 
D)  three

Question 15

The_______laws indicate that the order in which variables are ORed or ANDed is unimportant.

Accepted Answer

The answer of The_______laws indicate that the order in which...

Question 16

A certain printer requires that all of the following conditions be satisfied before it will send a HIGH to a microprocessor acknowledging that it is ready to print: 1. The printer's electronic circuits must be energized.
 2. Paper must be loaded and ready to advance.
 3. The printer must be "on line" with the microprocessor.
 As each of the above conditions is satisfied, a HIGH is generated and applied to a 3- input logic gate. When all three conditions are met, the logic gate produces a HIGH output indicating readiness to print. The basic logic gate used in this circuit would be a(n):

Accepted Answer

A)  OR gate. 
B)  AND gate. 
C)  NOR gate. 
D)  NOT gate. 
A)  OR gate. 
B)  AND gate. 
C)  NOR gate. 
D)  NOT gate.

Question 17

The basic logic gate that must have all of its inputs HIGH to have a high output is the:

Accepted Answer

A)  AND gate. 
B)  NOT gate. 
C)  OR gate. 
D)  NOR gate. 
A)  AND gate. 
B)  NOT gate. 
C)  OR gate. 
D)  NOR gate.

Question 18

Basic operations in Boolean algebra are called_______operations.

Accepted Answer

The answer of Basic operations in Boolean algebra are called_______operations....

Question 19

A small circle on the output of a logic gate is used to represent the:

Accepted Answer

A)  AND operation. 
B)  OR operation. 
C)  Comparator operation. 
D)  NOT operation. 
A)  AND operation. 
B)  OR operation. 
C)  Comparator operation. 
D)  NOT operation.

Question 20

A tennis player is waiting to receive a serve from their opponent. The opponent hits the	
 ball to the outside of the service court. The time it takes for the player to process the visual information and then begin to move in the direction of the serve is an example of _______.

Accepted Answer

The answer of A tennis player is waiting to receive...

The output from a logic gate changes at the same instant that the input to the gate changes.

Which of the following is NOT a basic Boolean operation?

-If we use DeMorgan's theorem to simplify the output expression for the circuit in Figure 3-1, we get:

The output expression for the circuit in Figure 3- 2 is Y =

To change a logic gate to its alternate representation, a simple three- step process is followed.

An inverted output NAND gate is called a(n)_______ gate.

The output from a_______ gate is HIGH (1) only when all inputs are LOW (0).

Which of the following accurately describes the logic circuit for the Boolean expression AB + BCD?

The output of a three input (A, B, and C) AND gate is connected to a two input OR gate. A second input to the OR gate is labeled D. The Boolean expression representing this logic circuit is:

74LS00 is a:

Which of the following statements best describes the function of the logic variable X?

The alternate logic symbol for an AND gate would have:

How many NAND gates would be required to perform the OR operation if two inputs are required?

The_______laws indicate that the order in which variables are ORed or ANDed is unimportant.

The basic logic gate that must have all of its inputs HIGH to have a high output is the:

Basic operations in Boolean algebra are called_______operations.

A small circle on the output of a logic gate is used to represent the:

A tennis player is waiting to receive a serve from their opponent. The opponent hits the ball to the outside of the service court. The time it takes for the player to process the visual information and then begin to move in the direction of the serve is an example of _______.

Introductory Concepts

Number Systems and Codes

Combinational Logic Circuits

Flip-Flops and Related Devices

Digital Arithmetic: Operations and Circuits

Counters and Registers

Integrated-Circuit Logic Families

MSI Logic Circuits

Digital System Projects Using HDL

Interfacing With the Analog World

Memory Devices

Programmable Logic Device Architectures

Filters

Exam 3: Describing Logic Circuits

The output from a logic gate changes at the same instant that the input to the gate changes.

Which of the following is NOT a basic Boolean operation?

-If we use DeMorgan's theorem to simplify the output expression for the circuit in Figure 3-1, we get:

The output expression for the circuit in Figure 3- 2 is Y =

To change a logic gate to its alternate representation, a simple three- step process is followed.

An inverted output NAND gate is called a(n)_______ gate.

The output from a_______ gate is HIGH (1) only when all inputs are LOW (0).

Which of the following accurately describes the logic circuit for the Boolean expression AB + BCD?

The output of a three input (A, B, and C) AND gate is connected to a two input OR gate. A second input to the OR gate is labeled D. The Boolean expression representing this logic circuit is:

74LS00 is a:

Which of the following statements best describes the function of the logic variable X?

The alternate logic symbol for an AND gate would have:

How many NAND gates would be required to perform the OR operation if two inputs are required?

The_______laws indicate that the order in which variables are ORed or ANDed is unimportant.

The basic logic gate that must have all of its inputs HIGH to have a high output is the:

Basic operations in Boolean algebra are called_______operations.

A small circle on the output of a logic gate is used to represent the:

A tennis player is waiting to receive a serve from their opponent. The opponent hits the ball to the outside of the service court. The time it takes for the player to process the visual information and then begin to move in the direction of the serve is an example of _______.

Introductory Concepts

Number Systems and Codes

Combinational Logic Circuits

Flip-Flops and Related Devices

Digital Arithmetic: Operations and Circuits

Counters and Registers

Integrated-Circuit Logic Families

MSI Logic Circuits

Digital System Projects Using HDL

Interfacing With the Analog World

Memory Devices

Programmable Logic Device Architectures

Filters