Units & Binary - 1.2.2

Question 1

What is the order of units?

Answer 1

Bit
Nibble - 4 bits
Byte - 2 nibbles
Kilobyte
Megabyte
Gigabyte
Terabyte
Petabyte

Question 2

What is a character set? Examples (2):

Answer 2

A table of data that links a character to a number
Allows the computer system to convert text into binary
ASCII or Unicode

Question 3

How many bits does ASCII use?

Answer 3

7 bits so 128 characters in total
Includes punctuation codes, uppercase, lowercase, numbers and control codes

Question 4

How many bits does extended ASCII use?

Answer 4

8 bits so 256 characters
Allows for special characters like accented letters for French and Spanish

Question 5

What is Unicode, how many bits does it use?

Answer 5

Replaced ASCII as it has much more variety of characters like foreign characters
Uses 16 bits so over 65,000 characters possible

Question 6

What is the denary number 63 in binary and hexadecimal?

Answer 6

00111111
3F

Question 7

FA in binary and denary?

Answer 7

250
11111010

Question 8

10101011 in hexadecimal and denary?

Answer 8

AB
171

Question 9

220 in binary and hexadecimal?

Answer 9

11011100
DC

Question 10

75 in denary and binary?

Answer 10

117
01110101