Exam Prep notes Gr 12

Question 1

Virtual Memory

Answer 1

When a computer has physical memory shortages, the operating system will compensate by using both hardware and software to temporarily transfer data from RAM to disk

Question 2

Shaped vs Unshaped

Answer 2

• Controlling the flow of data traffic to ensure that it adheres to predetermined limits/priorities
• Shaped traffic is controlled to maintain a consistent flow
• Unshaped traffic is allowed to flow freely with no restrictions

Question 3

Capped vs Uncapped

Answer 3

• Capped is when there is a limit or maximum
• Uncapped is when there is no limit or the limit is not implemented

Question 4

Access data types

Answer 4

Data types in Access determine what kind of data can be stored in a field of a table
* Text
* Memo- stores large amounts of text
* Number
* Date/Time
* Currency
* AutoNumber- Generates a unique number for each record
* Attachment- Stores documents and files as attachments
* Yes/No- Boolean values like true/false

Question 5

CAPTCHA

Answer 5

• Completely Automated Public Turning test to tell Computers and Humans Apart
• It’s a challenge response test thats used to determine whether a user is a human or not

Question 5

eSATA

Answer 5

• External Serial Advanced Technology Attachment
• It’s an external interface for SATA drives that provide faster data transfer than USBs

Question 6

ISO

Answer 6

• International Organisation for Standardisation
• How much light may enter a camera sensor

Question 7

Algorithm

Answer 7

• A step by step procedure for formula when completing a task or solving a problem
• In computers they are used for data processing and performing calculations

Question 8

Resolution

Answer 8

• The number of pixels that can be displayed on a screen, expressed in width x height

Question 8

Refresh Rate

Answer 8

• The number of times per second that a display updates its image, measured in hz
• Indicated how slowly motion appears on the screen

Question 9

Access Points

Answer 9

• Devices that allow for wireless devices to connect to wired networks using wifi
• Almost like a bridge betweeen wireless devices and wired network infrastructure

Question 10

AUP

Answer 10

• Acceptible Use Policy
• Outlines the rules and guidelines when using a server or network

Question 11

EULA

Answer 11

End User License Agreement
* Contract between end-user and software developer that stipulates the rules and permissions for using software

Question 12

Cloud Storage vs Cloud computing

Answer 12

Cloud Storage: Storing data on an internet server instead of locally on a storage device
Cloud Computing: Providing computer services on the internet on a pay-per-use basis

Question 13

BYOD

Answer 13

Bring Your Own Device
* A policy that allows employees to use their own personal device for work

Question 14

Eco Mode Printers

Answer 14

• A setting on printers that allows the printer to reduce environmental impact and power usage
• Reduce printing quality
• Switch to duplex printing

Question 14

Spoofing

Answer 14

A trick that tricks people through falsifying information
* In networking it’s when the source address is made to appear as if its from a trusted source

Question 15

Erros in Excel

Answer 15

• Syntax error: When the formula has an error in its structure or syntax
• Value error: When formula has an invalid value or cannot perform a calculation
• Circular reference error: When a formula directly or indirectly references its own cell
• # DIV/0!: When a formula tries to divide by zero
• # N/A: When a value isnt available or cannot be found

Question 15

Primary Key (Access)

Answer 15

A unique identifier that ensures that each record can be in a table can be indentified and retrieved

Question 16

Smart device

Answer 16

A device that is able to connect to the internet or other devices, collect and process data, make decisions, and perform tasks with little to no human effort/intervention

Question 17

VR and AR

Answer 17

• Virtual Reality : technology that imitates and stimulates a realistic environment, usually through headsets
• Augmented Reality: technology that overlays virtual objects or digital information onto the real environment, usually through smartphone cameras`

Question 18

Types of software

Answer 18

• Freeware software: Is offered for free with limited features/functionality, can be distributed for free
• Shareware software: Is initially offered for free but has a charge in order to continue to use it or to get access to advanced features
• Proprietary software: It belongs and is controlled by a company or individual athat controls how it may distributed, used and modified.

Question 19

LAN port

Answer 19

A physical port that connects to a local area network to enable communication between devices within the network

Question 19

VGA

Video Graphics Array Port

Answer 19

A port used to connect a computer to a display device or monitor for transmitting analogue radio signals

Question 19

HDMI

High Definition Mulitmedia Interface

Answer 19

A digital interface thats used to transmit video signals and audio between devices, usually connecting computers to monitors or TVs

Question 20

Types of printers

Answer 20

• Inkjet: liquid ink is sprayed onto paper
• Dot Matrix: tiny pins strike ink-soaked ribbon to create small dots into paper
• Lazer: uses toner powder and heat to fuse onto paper

Question 21

USB Type C port

Answer 21

A port with a reversible connector used to transmit power, video signals, and data at high transfer speeds

Question 22

DIMM slots

Answer 22

Slots on the motherboard used to insert RAM modules

Question 23

SATA

Serial ATA

Answer 23

Cables: Used to connect storage devices like HDD or SSD to motherboard
Port: The ports on the motherbaord provide connection for SATA cables to attach to storage devices
Transfer power and data files: they provide both data transfer and power delivery between storage devices and the computer

Question 24

USB Hub

Answer 24

• A device that expands the amount of USB ports on a computer to allow multiple devices to be connected at once