1.4.1 Data Types - Character sets

Question 1

How signals work

Answer 1

Transferred by switches which open and close
A closed switch conducts electricity and has a value of 1
A bit is representative of a switch

Question 2

How many combinations of values can a computer produce for n bits

Answer 2

2^n

Question 3

Byte

Answer 3

A collection of 8 bits

Write leading 0s if you represent a value in a byte

Question 4

kB

Answer 4

Kilobyte

1000 (1 x 10^3) bytes

Question 5

MB

Answer 5

Megabyte

1 x 10^6 bytes

Question 6

GB

Answer 6

Gigabyte

1 x 10^9 bytes

Question 7

TB

Answer 7

Terabyte

1 x 10^12 bytes

Question 8

KiB

Answer 8

Kibibyte

2^10 (1024) bytes

Question 9

MiB

Answer 9

Mibibyte

2^20 bytes

Question 10

GiB

Answer 10

Gibibyte

2^30 bytes

Question 11

TiB

Answer 11

Tibibyte

2^40 bytes

Question 12

ASCII

Answer 12

Standardised binary values for symbols
7 bits (128 values), 32 upwards for each symbol on a keyboard
Later increased to 8 bits (extended ASCII)

Question 13

Unicode

Answer 13

Made to standardise encoding characters in all languages
16/32 bits
+ every character in every language can be represented
- it requires more storage to be used