DATA REPRESENTATION

Question 1

Type of data stored on computers

Answer 1

Numbers, Text, Graphics, Sound

Question 2

What is Digitization?

Answer 2

Process of converting info eg texts , numbers into digital data that can be manipulated by electronic devices

Question 3

What is the difference between non positional number systems and positional number systems

Answer 3

In Non-positional a symbol represents the same value regardless of its position while in positional uses the place value method to assign value to a symbol

Question 4

Advantages of HEX over OCTAL

Answer 4

• Shorter

- Convenient when word length is divisible by 4 and not 3

Question 5

Advantages of OCTAL over HEX

Answer 5

• Easier to derive from binary
• -Cannot be confused with names or words
• Converting to decimal is simpler
• Octal arithmetic is simpler

Question 6

What is the difference between a bit and a byte?

Answer 6

bit(binary digit) is a 0 or 1 used in the representation of data while a byte is a group of eight bits

Question 7

Explain the use of:
1. Kilobyte(KB)
2.Mbps (Megabits per second)
3.Megabyte(MB)
4Gigabit(GB)

Answer 7

1. size of small files
2. faster data rates eg internet connection
3. size of files containing images or videos
4. storage capacity

Question 8

What is a number system?

Answer 8

A mathematical notation for representing numbers of a given set using digits or other symbols in a consistent manner

Question 9

3 reasons why it was necessary to devise the HEX and OCT systems?

Answer 9

1. Provide human friendly representation of binary code
2. Binary code in text are a waste of space
3. More convenient for longer strings