Computer 140 IT2-IT 40

Question 1

Digital literacy

Answer 1

involves having a current knowledge and understanding of computers, mobile devices, the Internet, and related technologies.

Question 2

Computers

Answer 2

A computer is an electronic device, operating under the control of instructions stored in its own memory, that can accept data (input), process the data according to specified rules,produce information (output), and store the information for future use. Computers contain many electric, electronic, and mechanical components known as hardware.

Question 3

personal computer

Answer 3

A personal computer (PC) is a computer that can perform all of its input, processing, output, and storage activities by itself

Question 4

Laptops

Answer 4

A laptop, also called a notebook computer, is a thin, lightweight mobile computer with a screen in its lid and a keyboard in its base.

Question 5

Tablets

Answer 5

Usually smaller than a laptop but larger than a phone, a tablet is a thin, lighterweight mobile computer that has a touch screen. A popular style of tablet is the slate, which does not contain a physical keyboard.

Question 6

Desktops

Answer 6

Desktops A desktop, or desktop computer, is a personal computer designed to be in a stationary location, where all of its components fit on or under a desk or table.

Question 7

Servers

Answer 7

Servers A server is a computer dedicated to providing one or more services to other computers or devices on a network. A network is a collection of computers and devices connected together, often wirelessly.

Question 8

Smartphones

Answer 8

Smartphones A smartphone is an Internet-capable phone that usually also includes a calendar, an appointment book, an address book, a calculator, a notepad, games, and several other apps (which are programs on a smartphone). Smartphones typically communicate wirelessly with other devices or computers. With several smartphone models, you also can listen to music and take photos. Many smartphones have touch screens.

Question 9

E-Book Readers

Answer 9

An e-book reader (short for electronic book reader), or e-reader, is a mobile device that is used primarily for reading e-books (Figure 9). An e-book, or digital book, is an electronic version of a printed book, readable on computers

Question 10

Game Devices

Answer 10

Game Devices A game console is a mobile computing device designed for single-player or multiplayer video games. Gamers often connect the game console to a television so that they can view their gameplay on the television’s screen

Question 11

INPUT

Answer 11

Users have a variety of input options for entering data into a computer, many of which involve using an input device. An input device is any hardware component that allows you to enter data and instructions into a computer or mobile device. The following sections discuss common input methods.

Question 12

KeyBoard

Answer 12

A keyboard contains keys you press to enter data and instructions into a computer or mobile device.All desktop keyboards have a typing area that includes letters of the alphabet, numbers, punctuation marks, and other basic keys. Some users prefer a wireless keyboard because it eliminates the cluster of a cord.

Question 13

Pointing Devices

Answer 13

A pointing device is an input device that allows a user to control a small symbol on a screen, called the pointer. Desktops typically use a mouse as their pointing device, and laptops use a touchpad (Figure 13). A mouse is a pointing device that fits under the palm of your hand comfortably. With the mouse, you control movement of the pointer and send instructions to the computer or mobile device.

Question 14

Voice and Video Input

Answer 14

Some mobile devices and computers enable you to speak data instructions using voice input and to capture live full-motion images using video input. With your smartphone, for example, you may be able to use your voice to send a text message, schedule an appointment, and dial a phone number.

Question 15

Scanners

Answer 15

A scanner is a light-sensing input device that converts printed text and images into a form the computer can process

Question 16

Outputs

Answer 16

Output Users have a variety of output options to convey text, graphics, audio, and video —many of which involve using an output device. An output device is any hardware component that conveys information from a computer or mobile device to one or more people.

Question 17

printer

Answer 17

A printer is an output device that produces text and graphics on a physical medium such as paper. Printed content sometimes is referred to as a hard copy or printout.

Question 18

Display

Answer 18

A display is an output device that visually conveys text, graphics, and video information. Displays consist of a screen and the components that produce the information on the screen. The

Question 19

Speaker

Answer 19

Speakers allow you to hear audio, that is, music, voice, and other sounds. Most personal computers and mobile devices have a small internal speaker. Many users attach higher-quality speakers to their computers and mobile devices, including game consoles.

Question 20

Memory and Storage

Answer 20

Memory consists of electronic components that store instructions waiting to be executed and the data needed by those instructions.

Question 21

Storage Device

Answer 21

records (writes) and/or retrieves (reads) items to and from storage media. Storage devices often also function as a source of input and output because they transfer items from storage to memory and vice versa. Drives and readers/writers, which are types of storage devices, accept a specific kind of storage media. For example, a DVD drive

Question 22

Storage Device

Answer 22

computer keeps data, instructions, and information on storage media. Examples of storage media are hard disks, solid-state drives, USB flash drives, memory cards, and optical discs.

Question 23

Hard Disk

Answer 23

A hard disk is a storage device that contains one or more inflexible, circular platters that use magnetic particles to store data, instructions, and information. The entire device is enclosed in an airtight, sealed case to protect it from contamination.

Question 24

Solid state Drive

Answer 24

A solid-state drive (SSD) is a storage device that typically uses flash memory to store data, instructions, and information.

Question 25

USB Drive

Answer 25

A USB flash drive is a portable flash memory storage device that you plug in a USB port, which is a special, easily accessible opening on a computer or mobile device

Question 26

Memory Cards

Answer 26

A memory card is removable flash memory, usually no bigger than 1.5 inches in height or width, that you insert in and remove from a slot in a computer, mobile device, or card reader/writer

Question 27

Optical Discs

Answer 27

An optical disc is a type of storage media that consists of a flat, round, portable metal disc made of metal, plastic, and lacquer that is written and read by a laser. CDs

Question 28

Web

Answer 28

The web consists of a worldwide collection of electronic Documents.

Question 29

Webpage

Answer 29

Each electronic document on the web is called a webpage,

Question 30

Malware

Answer 30

Malware, short for malicious software, is software that acts without a user’s knowledge and deliberately alters the computer’s and mobile device’s operations. Examples of malware include viruses, worms, trojan horses, rootkits, spyware, adware, and zombies. Each of these types of malware attacks your computer or mobile device differently. Some are harmless pranks that temporarily freeze, play sounds, or display messages on your computer or mobile device.

Question 31

Privacy

Answer 31

Nearly every life event is stored in a computer somewhere… in medical records, credit reports, tax records, etc. In many instances, where personal and confidential records were not protected properly, individuals have found their privacy violated and identities stolen.

Question 32

Health Concerns

Answer 32

Prolonged or improper computer use can lead to injuries or disorders of the hands, wrists, elbows, eyes, neck, and back. Computer users can protect themselves from these health risks through proper workplace design, good posture while at the computer, and appropriately spaced work breaks.

Question 33

Environmental Issues

Answer 33

Manufacturing processes for computers and mobile devices along with e-waste, or discarded computers and mobile devices, are depleting natural resources and polluting the environment. When computers and mobile devices are stored in basements or other locations, disposed in landfills, or burned in incinerators, they can release toxic materials and potentially dangerous levels of lead, mercury, and flame retardants.

Question 34

Green Computing

Answer 34

involves reducing the electricity consumed and environmental waste generated when using a computer.

Question 35

Software

Answer 35

also called a program, consists of a series of related instructions, organized for a common purpose, that tells the computer what tasks to perform and how to perform them. Two categories of software are system software and application software. System software

Question 36

Two categories of Software

Answer 36

Two categories of software are system software and application software.

Question 37

Operating System

Answer 37

An operating system is a set of programs that coordinates all the activities among computer or mobile device hardware.

Question 38

Application

Answer 38

Applications Application software, usually simply called an application (or app for short), consists of programs designed to make users more productive and/or assist them with personal tasks. Browsers, discussed in an earlier section, are an example of an application that enables users with an Internet connection to access and view webpages.

Question 39

RAM

Answer 39

Random Access Memory is temporary memory. You can either remove or add to RAM.

Question 40

Server

Answer 40

It’s typically a very large Desktop that usually connects network

Question 41

Tranistors

Answer 41

Represented by Binary code, keep getting smaller and smaller

Question 42

ROM

Answer 42

Read only memory: this permanent unchanging memory. It cannot be remove or altered.

Question 43

Cache

Answer 43

Cache is inside of e every computer, the cache speeds up the processor some manufacturers skimp on the cache and RAM