Computer Systems: Hardware vs. Software

Which statement best distinguishes hardware from software in a computer system?

• Software is tangible devices storing and retrieving data

• Software is the monitor, keyboard, and speakers

• Hardware is programs controlling how data is processed

• Hardware is physical components performing input and output

Answer explanation

The correct statement highlights that hardware consists of physical components, such as the monitor and keyboard, that perform input and output functions, distinguishing it from software, which includes programs and applications.

Which list correctly names the four primary functions performed by computer hardware?

• Design, compilation, debugging, deployment

• Sensing, encrypting, compressing, transmitting

• Input, processing, storage, output

• Authentication, authorization, accounting, auditing

Answer explanation

The correct choice is 'Input, processing, storage, output' as these are the four primary functions of computer hardware. They represent how data is received, manipulated, saved, and presented.

A keyboard and mouse primarily support which hardware function?

• Input from the user to the computer

• Output of information to displays

• Processing of instructions and data

• Long‑term data storage on media

Answer explanation

A keyboard and mouse are input devices that allow users to send commands and data to the computer, making 'Input from the user to the computer' the correct choice. The other options relate to different hardware functions.

Which example best represents software in the system shown?

• A speaker producing audio signals

• A solid‑state drive storing user documents

• A monitor displaying visual output

• An operating system controlling hardware operations

Answer explanation

The operating system is software that manages hardware operations, making it the best representation of software in the system. The other options are hardware components or outputs, not software.

A business must choose computer hardware by understanding current and future requirements. Which planning step best supports this decision?

• Purchase the newest devices without assessment

• Focus only on output devices like monitors

• Select software first and ignore hardware needs

• Analyze workloads and growth to match hardware

Answer explanation

The best planning step is to analyze workloads and growth to match hardware. This ensures that the chosen hardware meets both current and future business needs, unlike the other options that lack assessment.

In the diagram, which component resides on the motherboard and directly includes the ALU, control unit, and registers?

• Central processing unit

• Communications adapter

• Primary storage module

• Internal hard drive

Answer explanation

The Central Processing Unit (CPU) is the main component on the motherboard that includes the Arithmetic Logic Unit (ALU), control unit, and registers, making it the correct answer.

Which statement best describes the role of the ALU inside the CPU?

• Routes packets to networks

• Manages device drivers

• Performs calculations and comparisons

• Stores programs permanently

Answer explanation

The ALU (Arithmetic Logic Unit) is a critical component of the CPU that performs calculations and comparisons, making it essential for executing arithmetic operations and logical decisions in processing data.

According to the diagram, primary storage includes RAM and ROM. What is the key distinction implied between primary storage and the internal hard drive?

• Primary storage is removable media

• Primary storage is faster volatile memory

• Primary storage is optical-based

• Primary storage is external only

Answer explanation

The key distinction is that primary storage, which includes RAM and ROM, is faster volatile memory, meaning it loses data when power is off, unlike the internal hard drive which is non-volatile and slower.

On the system unit diagram, what interconnect carries data between the CPU, memory, and ports?

• Fiber channel

• Pipeline network

• System bus

• Cache lane

Answer explanation

The system bus is the main interconnect that carries data between the CPU, memory, and ports, facilitating communication within the computer system. Other options like fiber channel and cache lane serve different purposes.

Which component coordinates the flow of data in and out of the ALU, registers, storage, and output devices?

• Arithmetic/logic unit

• Control unit

• I/O ports

• Secondary storage

Answer explanation

The control unit coordinates the flow of data between the ALU, registers, storage, and output devices, ensuring that instructions are executed in the correct sequence.