Principles of Information Systems (MindTap Course List)
Principles of Information Systems (MindTap Course List)
13th Edition
ISBN: 9781305971776
Author: Ralph Stair, George Reynolds
Publisher: Cengage Learning
Expert Solution & Answer
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Chapter 3, Problem 1SAT
Program Description Answer

In a computer, “CPU” is the part that sequences and executes the instructions.

Hence, the correct answer is option “A”.

Expert Solution & Answer
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Explanation of Solution

Central Processing Unit (CPU):

  • CPU plays the key role in a computer by carrying out the instructions of a computer program.
  • It performs all the basic logic, arithmetic, controlling and input/output operations that are specified by the instructions.
  • The CPU comprises of two units, Arithmetic logic unit (ALU) and control unit (CU).
  • With all the advancement in technology, today the CPUs are in the form of microprocessors.

Explanation for incorrect options:

Memory:

The part of the computer that stores all the data and instructions is called the memory.

Hence, the option “B” is wrong.

Bus:

Bus is the communication system in a computer that transfers information from one component to other.

Hence, the option “C” is wrong.

Input/output devices:

The devices that fetch the user instructions and display the result to the user are called the input and output devices respectively.

Hence, the option “D” is wrong.

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