1.01 - Number systems

Question 1

What is the base of denary numbers?

Answer 1

10

Question 2

What is the base of the binary numbers?

Answer 2

2

Question 3

How is each digit represented in the binary number system?

Answer 3

1s and 0s

Question 4

A group of eight bits is called…

Answer 4

… a Byte

Question 5

list

2 (to the power 0) - 2 (to the power 8)

Answer 5

1
2
4
8
16
32
64
128
256

Question 6

Base of hexadecimals?

Answer 6

base 16

Question 7

How are hexadecimal digits represented?

Answer 7

0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F

A=10, B=11, C=12, D=13, E=14, F=15

Question 8

What is a group of four bits?

Answer 8

A nibble

Question 9

How many hexa decimal digits can be used represent a nibble?

Answer 9

One. This means that two can be used to represent a byte of binary code

Question 10

Example of when hexadecimal representations of bytes occur

Answer 10

When an error has occured during the execution of a program. A memory dump is provided which has a hexadecimal representation of the content of some chosen part of the memory.

Question 11

How to convert Denary to binary?

Answer 11

Divide the denary number by 2. Remainders are the binary numbers.

Leading zeros are ignored however a binary code must not include blanks

Question 12

How to convert binary to denary?

Answer 12

Multiply the binary number with the squares of 2. Add all the answers.

Question 13

How to convert denary to hexadecimal?

Answer 13

Divide the denary number by 16. Remainder is the hexadecimals value.

Question 14

How to convert hexadecimal to denary?

Answer 14

Multiply the hexadecimal value by the squares of 16. Add all the answers