comp science test 2 3rd form

Question 1

what is a computer

Answer 1

A computer is a digital machine that accepts input, processes it according to some instructions and produces output

Question 2

What is an electronic device

Answer 2

An electronic device is an object that has been specifically designed to perform a particular function

Question 3

3 examples of input devices

Answer 3

Keyboard
Mouse
Microphone
Scanner
Barcode reader
Digital camera

Question 4

3 examples of output devices

Answer 4

Screen
Printer
Speakers
Headphones
Projector

Question 5

2 examples of input + output devices

Answer 5

Touch screen
Interactive white board

Question 6

what is an embedded device

Answer 6

An embedded device is a special-purpose computer system that is completely encapsulated by the device it controls.

Question 7

motherboard definition

Answer 7

The main printed circuit board
contains the CPU

contains the main system memory

and other components essential to the devices operation

Question 8

CPU definition

Answer 8

processes instructions and carries out commands

Question 9

heatsink definition

Answer 9

prevents overheating from the CPU

Question 10

RAM definition

Answer 10

short term memory for performing calculations, cleared when computer is turned off

Question 11

Hard drive definition

Answer 11

Long term storage for computers data even when turned off

Question 12

Expansion slot definition

Answer 12

slots on the motherboard of desktop computers that allow for upgrades such as adding graphics card or wireless cards

Question 13

PSU definition

Answer 13

Takes power from a wall outlet and distributes it to the computers components

Question 14

If data is lost when the power is switched off what is it called

Answer 14

volatile storage

Question 15

What is a hard drive that stores data even when the power is switched off called

Answer 15

non-volatile storage

Question 16

How does a magnetic hard disk store data

Answer 16

by changing the polarity of tiny magnetic dots.

Question 17

How does a solid state drive and RAM store data

Answer 17

by using tiny electronic switches called transistors.

Question 18

How does optical storage store data

Answer 18

by burning tiny pits and lands using a laser and they will reflect light differently when read.

Question 19

What is the CPU made up of

Answer 19

Control unit
Arithmetic and logic unit
registers

Question 20

control unit function in CPU

Answer 20

tells the other components what to do

translates the instruction into a command that it can process

Question 21

Registers function in CPU

Answer 21

where you can temporarily store data

Question 22

ALU function in CPU

Answer 22

The Arithmetic and Logic Unit (ALU) actually carries out all the logic and mathematical operations

Question 23

What does a computer use and what is it controlled by

Answer 23

Computers use electric circuits controlled by switches to represent all data and instructions

Question 24

3 two states in computers

Answer 24

on or off
1 or 0
true or false

Question 25

examples of embedded devices

Answer 25

digital watches digital cameras

Question 26

LMC code for compare

Answer 26

CMP

Question 27

LMC code for less than

Answer 27

BLT

Question 28

LMC code for less than or equals to

Answer 28

BLE

Question 29

LMC code for greater than

Answer 29

BGT

Question 30

LMC code for greater than or equals to

Answer 30

BGE