Introduction To Computing Systems
Introduction To Computing Systems
3rd Edition
ISBN: 9781260150537
Author: PATT, Yale N., Patel, Sanjay J.
Publisher: Mcgraw-hill,
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Chapter 3, Problem 29E
Program Plan Intro

OR operation:

  • OR function needs two inputs and produces one output.
  • It is also known as binary logical function.
  • If one of the inputs or both the inputs are “1”, then one-bit OR operation produces the output as “1”.
  • If both the inputs are “0”, then OR operation produces the output “0”.
  • The following diagram depicts the one-bit OR operation,

Introduction To Computing Systems, Chapter 3, Problem 29E , additional homework tip  1

  • The truth table for OR operation is as follows,
XYZ=X OR Y
000
011
101
111
  • In the above table, “X” and “Y” are the inputs, and “Z” is the output.
  • In the above table, when “X=0”, and “Y=0”, the output “Z” is “0”, because both the inputs “X” and “Y” contains the value “0”.
  • When “X=0”, and “Y=1”, the output “Z” is “1”, because one of the input “Y” contains the value “1”.
  • When “X=1”, and “Y=0”, the output “Z” is “1”, because one of the input “X” contains the value “1”.
  • When “X=1”, and “Y=1”, the output “Z” is “1”, because both the inputs “X” and “Y” contains the value “1”.

AND function:

  • AND function needs two inputs and produces one output.
  • It is also known as binary logical function.
  • If one or both the inputs are “0”, then one-bit AND operation produces the output “0”.
  • If both inputs are “1”, then AND operation produces the output as “1”.
  • The following diagram depicts the AND operation,

Introduction To Computing Systems, Chapter 3, Problem 29E , additional homework tip  2

  • The truth table for AND operation is as follows,
XYX AND Y
000
010
100
111
  • In the above table, “X” and “Y” are inputs, and “Z” is output.
  • When “X=0”, and “Y=0”, the output is “0”, because both the inputs “X” and “Y” contains the value “0”.
  • When “X=0”, and “Y=1”, the output is “0”, because one of the input “X” contains the value “0”.
  • When “X=1”, and “Y=0”, the output is “0”, because one of the input “Y” contains the value “0”.
  • When “X=1”, and “Y=1”, the output is “1”, because both the inputs “X” and “Y” contains the value “1”.

NOR function:

  • The NOR operation produces the output which is the negation of the result of “OR” operation.
  • If one or both the inputs are “1”, then NOR operation produces the output as “0”.
  • If both the inputs are “0”, then NOR operation produces the output “1”.
  • The following diagram depicts the NOR operation,

Introduction To Computing Systems, Chapter 3, Problem 29E , additional homework tip  3

  • The truth table for NOR operation is as follows,
XYZ=X OR Y
001
010
100
110

NAND function:

  • The NAND operation produces the output which is the negation of the result of “AND” operation.
  • If one or both the inputs are “0”, then NAND operation produces the output “1”.
  • If both inputs are “0”, then NAND operation produces the output as “0”.
  • The following diagram depicts the NAND operation,

Introduction To Computing Systems, Chapter 3, Problem 29E , additional homework tip  4

  • The truth table for NAND operation is as follows,
XYX NAND Y
001
011
101
110

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