1.2 primary memory

Question 1

What is ROM?

Answer 1

ROM is non volatile and saves when the computer is off
Read only memory, small capacity, fast access times

Question 2

What is RAM?

Answer 2

RAM is volatile and looses stuff when unpowered

Question 3

Whats virtual memory?

Answer 3

Needed when there isn’t enough physical RAM to store open programs

Question 4

Whats optical? (+ and -)

Answer 4

+ cheap, lightweight, portable
- slow access times, prone to scratches
C-D, DVD and Blu-ray

Question 5

Whats magnetic? (+ and -)

Answer 5

+ cheap, large capacity
- slow access times, fragile
Tape, hard drive

Question 6

Whats solid state? (+ and -)

Answer 6

+ durable, fast access times
- cost, limited read/write
SSD, memory stick

Question 7

Denery to binary?

Answer 7

89 into binary=01011001

Question 8

Binary to denery?

Answer 8

01100110 into denery=102

Question 9

Binary addition?

Answer 9

01010101+10101010=11111111

Question 10

Denery to Hex?

Answer 10

12 in hex
Find out 12 in binary then split it in half (draw a line down middle). Put 8 4 2 1 under each side and add. Then convert to hex.

Question 11

Hex to Denery?

Answer 11

7C in Denery
(7x16) + (C or 12 x1)=124

Question 12

Binary shift?

Answer 12

Shift one to left = doubles so if the binary equals 22 the end number would be 44.
Shift one to the right = halves so if the number was 20 it should be 10.

Question 13

Whats ASCII?

Answer 13

It’s an English programming language

Question 14

Whats Unicode?

Answer 14

It’s any language for programming

Question 15

Num of colours can be calculated as?

Answer 15

2 to the power of n
n is the number of bits for each pixel

Question 16

Lossy compression?

Answer 16

Some data is lost
Good for images and video

Question 17

Lossless compression?

Answer 17

No data lost less effective
Good for documents