Binary & Hexadecimal

Question 1

Uses of Binary

Answer 1

ACII value
Unicode value
Instructions

Question 2

Uses of hexadecimal

Answer 2

MAC address
Error messages
HTML colours

Question 3

MAC address

Answer 3

Hardware address 
A unique number associated with device
48/64 bits (12/16 hex)
first half=manufacturer 
second half=serial number of device

Question 4

Shifting

Answer 4

Shifting bits

Shifting the register

Question 5

Problems of shifting

Answer 5

May run out of places at the end of the register
The end bit may be lost
May result in a loss of precision

Question 6

Memory Dumps

Answer 6

Writing all the RAM content into the storage device

Question 7

HTML (Hyper Text Markup Language)

Answer 7

Head and Body
Structure and Presentation
In HTML document structure and presentation often kept separate

Question 8

HTML Presentation

Answer 8

Presentation used for colour/style

CSS linked to the HTML used for Presentation

Question 9

HTML structure

Answer 9

HTML Tags used for structure

Structure used for layout

Question 10

URL

Answer 10

Composed of three parts (http://www.cie.org.uk/ScienecPapers)
File name- SciencePapers
Protocol- http://
Web server name- www.cie.org.uk

Question 11

Advantages of hexadecimal

Answer 11

easier to understand 
easier to debug
Shorter and takes less space
Faster to enter than binary
Converting to binary is easier than deanery