G8 - Data Representation

How many digits are in Binary system?

• One

• Two

• Four

• Eight

The brain of any computer is the micro-processor (or the micro-controller) that contain million of "switches" that can be either switched-ON or switched-OFF. That's why computers can only talk in...

• Hexadecimal

• Binary

• Base-10

• Hanzi

The DECIMAL number system (also called DENARY) consists of the following 10 symbols

• 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

• 1, 2, 3, 4, 5, A, B, C, D, E

• 1, 2, 3, 4, 5, 6, 7, 8, 9, 0

• A, B, C, D, E, F, G, H, I, J

The BINARY number system consists of the following symbols

• 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

• 0, 1

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

• A, B, C, D, E, F

The BINARY number system is also called

• BASE-1

• BASE-2

• BASE-10

• BASE-16

The DECIMAL number system is also called

• BASE-1

• BASE-2

• BASE-10

• BASE-16

The HEXADECIMAL number system is called BASE-16 because it consists of

• 2 symbols, which are 1 and 6

• 6 symbols, which are 1, 2, 3, 4, 5, 6

• 10 symbols, which are 0, 1, 2, 3, 4, A, B, C, D, E

• 16 symbols, which are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F

Each "0" or "1" in a binary number is called a BIT. The following is an example of 8-bit binary number:

• 12345678

• 08008008

• 00100111

• 0100111001100101

Computer's memory (RAM) consists of switches that can store a lot of bits that make up of information. 2-BIT BINARY can only represent 4 different information:

• 00, 11, 01 and 10

• 000, 001, 010 and 100

• 0000, 0001, 1000, 1111

• 0001, 0010, 0100, 1000

Computer's memory is measured in BYTE unit where one byte consists of 8 bits. The biggest (decimal) number that can be represented by 8-bit binary is

• 4 which is 00000100

• 8 which is 00001000

• 128 which is 10000000

• Bigger than 128 which is 11111111