1.2 Hexadecimal

Question 1

what is hexadecimal

Answer 1

a number system which used 16 different digits to display a value

Question 2

what are the 16 different digits in hexadecimal and their values

Answer 2

0,1,2,3,4,5,6,7,8,9 ALL SAME AS DENARY
A=10
B=11
C=12
D=13
E=14
F=15

Question 3

how to convert the number 2B into denary

Answer 3

answer = 43, see page 14 for explanation

Question 4

disadvantages of binary compared to hexadecimal

Answer 4

hard for people to understand binary
very easy to make errors in binary
hard to spot errors
writing in binary takes a lot of space and time

Question 5

advantages of hexadecimal

Answer 5

easy to read
easy to write
takes less space than binary
very easy to convert

Question 6

what are the uses of hexadecimal is RAM

Answer 6

everything has a location in RAM, these locations of bits and bytes are called memory adresses, memory adresses are binary numbers so everything about RAM can be respresented in binary, people uses hex to make it easier to read and write this information

Question 7

what are the 2 other uses of hexadecimal

Answer 7

to represent colours
for programmers to represent machine code and assembly language in hexadecimal