01 - Computer Basics | 03. Number Bases

Question 1

What are the three most commonly used number bases in computing?

Answer 1

1. Binary
2. Hexadecimal
3. Decimal

Question 2

What does Binary Information mean and what are the categories of it?

Answer 2

Binary information is defined as relating to, composed of, or involving two things. What we, as computer scientists, understand as examples of binary can be broken into two distinct categories:

1. Binary Numbers
2. Binary Data

Question 3

What are binary numbers expressed as?

Answer 3

Binary numbers are expressed as a combination of 0s and 1s. For example, 100110 is the binary equivalent of the number 38. Binary numbers are expressed using a base of two.

Question 4

What is the binary for each decimal 1-10?

Answer 4

Decimal 1 is Binary 1
Decimal 2 is Binary 10
Decimal 3 is Binary 11
Decimal 4 is Binary 100
Decimal 5 is Binary 101
Decimal 6 is Binary 1110
Decimal 7 is Binary 1111
Decimal 8 is Binary 1000
Decimal 9 is Binary 1001
Decimal 10 is Binary 1010

Question 5

What are common examples of binary data?

Answer 5

1. Machine Code (001010101100111001010010011)
2. Boolean Expressions (True or False)
3. Hardware states (On or Off)
4. Networking and File Storage

Question 6

T/F Computers only understand two states of being?

Answer 6

TRUE - Being off and on represented by 0 and 1 respectively

Question 7

T/F Computer hardware would be incredibly large, expensive, and resource-intensive if they were made to handle ten different states of data.

Answer 7

TRUE

Question 8

What are the specific lengths for binary data?

Answer 8

ASCII and Unicode

Question 8

T/F ASCII is the current international standard for characters

Answer 8

FALSE - The current international standard for characters is Unicode. ASCII is an older system for representing characters.

Question 9

What are the specific lengths for binary data?

Answer 9

• Byte is 8 bits
• Word is two Bytes (16 bits)

Question 10

File storage on your computer is referenced by what size?

Answer 10

Storage is referenced by Byte size. For example, your favorite app might be 250 MegaBytes (MB)

Question 11

What does MB stand for and what is it?

Answer 11

Megabyte. 1 million bytes of information.

Question 12

What is another way to state 1 million bytes of information?

Answer 12

MB - Megabyte

Question 13

What is hexadecimal and what does it do?

Answer 13

Hexadecimal (base 16), often called “hex,” is a convenient and concise way to represent binary numbers on a computer.

Question 14

What are hex numbers often used for?

Answer 14

Hex numbers are often used for values like colors and any other place where we need to represent bits more space efficiently. They are also commonly used to represent memory addresses.

Question 15

Every four binary digits can become a single _________________?

Answer 15

Hexadecimal digit

Question 16

What are the 16 numerals for the decimal to hexadecimal conversion?

Answer 16

Decimal 1 is Hexadecimal 1
Decimal 2 is Hexadecimal 2
Decimal 3 is Hexadecimal 3
Decimal 4 is Hexadecimal 4
Decimal 5 is Hexadecimal 5
Decimal 6 is Hexadecimal 6
Decimal 7 is Hexadecimal 7
Decimal 8 is Hexadecimal 8
Decimal 9 is Hexadecimal 9
Decimal 10 is Hexadecimal A
Decimal 11 is Hexadecimal B
Decimal 12 is Hexadecimal C
Decimal 13 is Hexadecimal D
Decimal 14 is Hexadecimal E
Decimal 15 is Hexadecimal F

Question 17

Binary numbers are expressed in base number 2 which means? Where are they found?

Answer 17

Binary numbers are expressed in base 2, meaning they are represented using only the values 1 and 0. Binary data can be found in computing in areas such as machine code and boolean expressions.

Question 18

Hexadecimal numbers are expressed in base number 16 which means? Where are they found?

Answer 18

Hexadecimal numbers are expressed in base 16. They are represented using a combination of decimal numbers 0-9 as well as letters A-F. Hexadecimal numbers can be found in memory addresses as well as colors.