Chapter 3 The Visible Computer

Question 1

What is computer

Answer 1

A computer is an electronic machine that processes raw data to give information as output. It takes inputs and process it under the influence of a set of special instructions called programming to produce the desired outputs

Question 2

Two parts of PC

Answer 2

1. Hardware
2. Software

Question 3

Four stages of computing

Answer 3

1. Input
2. Processing
3. Output
4. Storage

Question 4

What is system unit

Answer 4

The system unit, also known as the central processing unit (CPU) or computer case, is the main component of a computer that houses critical hardware components. It typically includes the CPU, motherboard, memory (RAM), storage devices, power supply, and various other internal components. The system unit is the “brain” of the computer, where data processing and calculations occur.

Question 5

What is peripheral devices

Answer 5

Peripheral devices are hardware components that connect to a computer’s system unit to provide additional functions and capabilities. These devices are used to input data into the computer or receive output from it

Question 6

Input devices

Answer 6

1. Input Devices:
   • Keyboard: Used for typing text and inputting commands.
   • Mouse: Provides a pointing device for selecting and interacting with on-screen objects.
   • Scanner: Converts physical documents or images into digital data.
   • Webcam: Captures video and images for video conferencing or recording.

Question 7

Output devices

Answer 7

. Output Devices:
• Monitor/Display: Shows visual output such as text, images, and videos.
• Printer: Produces hard copies of documents or images.
• Speakers: Provide audio output for music, videos, and other multimedia content.

Question 8

Storage devices

Answer 8

Storage Devices:
• External Hard Drives: Used for additional data storage.
• USB Flash Drives: Portable storage devices for transferring data.
• Optical Drives: Read and write data to CDs, DVDs, and Blu-ray discs.

Question 9

Networking devices

Answer 9

Networking Devices:
• Network Adapters: Enable computers to connect to wired or wireless networks.
• Modems: Connect to the internet via a telephone line or cable connection.

Question 10

A Plug

Answer 10

A plug is a part with some type of projection that goes into a port.

Question 11

A port

Answer 11

A port is a part that has some type of matching hole or slot that accepts the plug.

Question 12

Jacks

Answer 12

The term jack is used as an alternative to port, so you may also put a plug into a jack.

Question 13

The connectors

Answer 13

The term connector describes either a port or a plug.

Question 14

Mini- DIN connectors

Answer 14

It used to connect the keyboard and mice .

Question 15

USB connector
Universal serial Bus

Answer 15

Universal serial bus (USB) provides the most common general-purpose connection for PCs. You’ll find USB versions of many devices, such as mice, keyboards, scanners, cameras, and printers.

Question 16

Types of USB connectors

Answer 16

1. USB A
2. USB B , mini B
3. USB TYPE C

Question 17

Hot- swappable

Answer 17

First, USB devices are hot-swappable, which means you can insert or remove them without restarting your

Question 18

Fire Wire connectors

Answer 18

Also known as IEEE 1394, the FireWire interface is perfect for high-speed devices such as digital video cameras. PCs rarely have built-in 4- or 6-wire FireWire connectors, so users typically purchase a FireWire adapter card. Fire Wire devices are hot - swappable

Question 19

DB connector

Answer 19

DB connectors come in a variety of sizes, but only one shape. You’ll find only a few DB connectors on modern PCs, primarily for printers and video.

Question 20

RJ connectors

Answer 20

Modern PCs use only two types of RJ jacks: the RJ-11 and the RJ-45. The phone jack is an RJ-11. It is used almost exclusively for modems. The slightly wider RJ-45 jack is used for your network connection.

Question 21

Mini-audio connectors

Answer 21

Speakers and microphones connect to audio jacks on the system unit.
The most common type of sound connector in popular use is the 1/8-inch connector, also called a mini-audio connector.

Question 22

Keyboard connect with computer

Answer 22

Mini-DIN port or USB port

Question 23

Monitor connects with computer by

Answer 23

1. VESA ( video electronics standards Association
2. DVI ( digital video interface)
3. HDMI ( Hi- Definition Multimedia Interface)

Question 24

Sound

Answer 24

S/PDIF ( Sony / Philips Digital Interface Format)

Question 25

eSATA

Answer 25

The eSATA is a special connector for external hard drives and optical drives.

Question 26

CPU

Answer 26

The central processing unit (CPU), also called the microprocessor or brain of the computer, has a make, a model, a speed, and a package. AMD and Intel are the two most common makers of CPUs.
CPU speed is measured in megahertz (MHz) or gigahertz (GHz). The pin grid array (PGA) is the most common CPU package. A CPU cooling fan or heat sink is essential to dissipate the heat.

Question 27

RAM

Answer 27

Random access memory (RAM) contains the current programs and data that the CPU is using.
Most PC memory is installed on sticks called dual inline memory modules (DIMMs). RAM capacity is measured in megabytes (MB) or gigabytes (GB).

Question 28

Motherboard

Answer 28

The motherboard contains soldered components, expansion slots, and sockets for the CPU, RAM, and other components. Expansion slots are connectors for expansion cards that enable optional devices to communicate with the PC.

Question 29

Hard drive

Answer 29

Hard drives store programs and data that the CPU
is not currently using. An average PC has one hard drive , although most PCs accept more. Most PCs
use either PATA or SATA drives, both of which commonly connect to controllers built into the motherboard.

Question 30

SATA , PATA

Answer 30

SATA- Serial Advanced Technology Attachment
PATA - Parallel Advanced Technology Attachment