Digital Data

Question 1

Describe how a number is converted to a binary pattern for storage in compute

Answer 1

Computers Memory can be ON or OF

On is indicated by 1 and off is indicated by 0

Data is sorted character by character with each character being represented by a code, which will consist of 1’s and 0’s and each code is sent to the CPU

Question 2

Define a Bit

Answer 2

Smallest unit of storage on a computer

it is a single digit in a binary number(0 or 1)

Question 3

Define a Byte

Answer 3

a group of 8 bits

Question 4

Define a nibble

Answer 4

A nibble is half a byte, consisting of 4 bits

Question 5

How many bytes in a kilobyte

Answer 5

1024

Question 6

How many kilobytes in Megabytes

Answer 6

1024

Question 7

How many Megabytes in a gigabytes

Answer 7

1024

Question 8

how many gigabytes in a terabyte

Answer 8

1024

Question 9

What are the two types of character representation

Answer 9

ASCII(7- bit and 8-bit)

Unicode

Question 10

Expand ASCII

Answer 10

American Standard Code for Information Interchange

Question 11

Explain ASCII(7 bit)

Answer 11

Uses 7 bits to represent each character,only 128 characters could be represented in the character set

Question 12

Explain ASCII(8 bit)

Answer 12

Uses 8 bits to represent each character, a further 128 characters can be represented in the character set, totalling 256 characters

Question 13

Explain Uni Code

Answer 13

Unicode typically uses 16 bits to represent a character and so can represent up to 65000 character

Question 14

Explain the meaning of Overflow

Answer 14

Overflow happens when computerized calculations produce an answer that it too big to represented

Question 15

Define a Variable

Answer 15

A memory location given a name used to hold data which can change value