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Flashcards in Computer Science Pack Deck (21)
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1

What is meant by a Denary System?

Number system based on the number 10

2

What is meant by a Binary System?

Number system based on the number 2

3

What are the placeholder values for binary?

128, 64, 32, 16, 8, 4, 2, 1

4

What is the process for converting binary to denary?

Add up the placeholder values where a 1 appears underneath it

5

What is the process for converting denary to binary?

Place a 1 if the value you have is smaller than the placeholder value. Then subtract your value by the placeholder value.

IF your number is smaller than the placeholder value, just put a 0 in.

6

How many bits in a nibble?

4

7

How many bits in a byte? 1

8

8

List all the memory sizes from largest to smallest 2

PB
TB
GB
MB
KB
B

9

What number do you multiply/divide by to convert measurement units?

1024

10

What is a computer system?

A computer system is made up of software, data, hardware, communications and people/users

11

What is a subsystem?

A sub-system is a system that can be divided up into smaller parts.

Each sub-system can be further divided into sub-systems and so on until each sub-system just performs a single action.

12

Year 10:
What base system does Hexadecimal use?

Base 16

13

Year 10:
Why do you use Hexadecimal?

It is easier to remember than Binary for a programmer.

14

Year 10:
Give an example of where you use Hexadecimal numbers.

To represent colour codes for websites

15

What is an algorithm?

It is a sequence of steps that follow a logical order to solve a problem

16

What is data transmission?

is data being passed over a short distance or a long distance.

17

Give an example of data transmission over a short distance

Computer to printer

18

Give an example of data transmission over a long distance

Over a telephone network

19

How many factors need to be considered when transmitting data?

3

20

State how computers avoid errors during transmission

Each factor has to be agreed by both the sender and receiver to work

21

State the 3 factors that need to be considered when transmitting data

1. The direction of the data transmission
2. The method of transmission
3. The method of synchronisation between devices