chapter 1 part 1

Question 1

what is a computer?

Answer 1

a computer is a device that receives input, processes that input and then produces the output

Question 2

define analogue data

Answer 2

data that is constantly varying

Question 3

define digital data

Answer 3

discrete data that is made up from only two values 0 and 1

Question 4

define hardware

Answer 4

physical components that make up a computer

Question 5

define software

Answer 5

programs used to control the hardware

Question 6

why is data stored as binary in the computers

Answer 6

• as computers consist of logic gates
  -logic gates can only process data in two states (0 and 1)

Question 7

define denary numbers

Answer 7

-it has a base of 10
-it uses ten values that are 0 to 9
-units increase by the power of 10

Question 8

define binary numbers

Answer 8

-it has a base of 2
-it only uses two values that are 0 and 1
-units increase by the power of 2