2020 NOV IT theory

A technique where two or more disks are grouped together by a special controller to minimise the possible loss of data

A technique where two or more disks are grouped together by a special controller to minimise the possible loss of data

RAID

An encryption protocol which encodes data that is sent over the internet

SSL

The protocol used to transfer large files between remote computers that have an internet connection

FTP

Briefly explain what a service pack is

Allows user to gain new updates and features

Define a high-level programming language

Language that is easy for humans to understand as it relates to the language we use

The differences between a compiler and interpreter

Interpreter:

• Translates code line by line

• does not create an executable line

Compiler:

• Translates the entire program

• creates an executable file

What is the function of an API?

The interface between a programming language and the operating system

Name the slot or connector used to add the DVD drive

SATA

Name the slot or connector used to add the Graphics card

PCIe

Explain how the system clock aids in coordinating the transfer of data on a motherboard.

the system clock generates pulses that regulate the rate at which data is transferred between components

Differentiate between a syntax error and a runtime error.

Syntax error prevents program from running due to violated programming rules

runtime error when the program is executed/run and a problem is encountered

Give TWO reasons why the use of cache memory allows the CPU to perform tasks faster than when RAM is used.

Cache memory is physically closer to/on the CPU.

Cache memory stores frequently to be used instructions.

Type of memory used for cache memory is faster than RAM

Explain how the operating system uses the additional memory when required.

By swapping information not being used between the hard disk space/virtual memory/additional memory and the RAM

State TWO advantages associated with the use of cloud computing

 Scalability

 Ubiquity, Can be accessed anywhere at any time

 Enables collaboration

 No need for maintenance and upgrades of hardware

 No need for software installation and upgrades

 Saves local resources/ storage space

State TWO virtualisation techniques employed by companies that offer cloud services.

sharing of resources

combining resources from different computers to make a super computer

Briefly explain what multitasking is.

The operating system shares processing time between multiple tasks/programs

Why is a VPN useful to employees

To access files and documents on the business computer from anywhere with the same security as in the office/LAN with the same software as in the office