CS - Data Rep - Binary

Question 1

What is Machine Code?

Answer 1

The language that computers use to understand and process information using binary

Question 2

Describe the denary system and the binary system

Answer 2

• denary = base 10 system, uses numbers 0-9
• binary = base 2 system, uses the symbols 0 and 1

Question 3

What is an Overflow error?

Answer 3

When the result of a binary calculation is too long for a computer to process.

If the answer to a calculation is 9 bits but a byte an only fit 8 bits

Question 4

What is a bit?

Answer 4

the smallest unit of data that a computer can process and store.

short for binary digit

Question 5

What is a byte and what is a nibble?

Answer 5

Consists of 8 adjacent binary digits, each of which consists a 0 or 1. A nibble is half of this (4 bits)

Question 6

What do the following formulas work out?
* 2ⁿ
* 2ⁿ - 1

Answer 6

• 2ⁿ = Num of bit patterns
• 2ⁿ - 1 = Highest num of binary codes

Question 7

What is the highest and lowest binary code that is avaliable?

Answer 7

0 - Lowest
255 - Highest
(256 different binary codes)