Computer Science Chapter 4.5- Fundamentals of data representation

What is a natural number?

a whole positive number (eg. 1,2,3)

What is the letter for a natural number?

N

What is an integer?

A whole number (eg. -2,-1,0,1,2)

What is the letter for an integer?

Z

What is a rational number?

Numbers that can be written as a fraction (eg. 1/3 , -5/3)

What is the letter for a rational number?

Q

What is an irrational number?

A number that cannot be written as a fraction (eg, π, e)

What is the letter for irrational numbers?

I (i)

What is a Real number?

All possible quantities

What is the letter for a real number?

R

What is an ordinal number?

A number that represents the position or order of something in a sequence (eg. 1st, 2nd, 3rd)

What base numbers do decimal, binary and hexadecimal have?

decimal - base 10

binary - base 2

hexadecimal - 16

What are binary prefixes used for?

Binary prefixes describe quantities of bytes using powers of 2

What are the binary prefixes for bytes?

kibi (Ki) = 2¹⁰

mebi (Mi) = 2²⁰

gibi (Gi) = 2³⁰

tebi (Ti) = 2⁴⁰

What are the decimal prefixes used for?

Decimal prefixes describe quantities of bytes using powers of 10

What are the decimal prefixes for bytes?

kilo (K) = 10³

mega (M) = 10⁶

giga (G) = 10⁹

tera (T) = 10¹²

What is signed binary and unsigned binary?

Signed binary = negative numbers

Unsigned binary = positive numbers

When using unsigned binary how can you calculate the maximum value possible with a given number of bits?

2ⁿ - 1