P1 - Hardware and software

Question 1

What does ‘IPO’ stand for?

Answer 1

Input –> Process –> Output

Question 2

What model does all hardware and software use?

Answer 2

The IPO model

Question 3

How does the IPO model work?

Answer 3

Receives inputs from user or other source –> does some computation on the inputs –> returns results of these computations

Question 4

What are the different software types?

Answer 4

• Security software
• Application software
• System software

Question 5

What is the definition of ‘Security Software’?

Answer 5

Any software that procides security for a computer or network

Question 6

What is the definition of ‘Application Software’?

Answer 6

Software created for a specific purpose. It is generally a program or collection of programs used by end users. It can be called an ‘application’ or simply an ‘app’.

Question 7

What is the definition of ‘System Software’?

Answer 7

A type of computer program that is designed to run a computer’s hardware and application programs. The interface between the hardware and the software.

Question 8

Definition of ‘hardware’?

Answer 8

any physical device used in or with your machine

Question 9

Definition of ‘software’?

Answer 9

collection of codes installed onto your computer’s hard drive

Question 10

Give an example of Security Software:

Answer 10

Anti-vurs, Firewall..

Question 11

Give an example of Application Software:

Answer 11

Database/ Word..

Processors/ Web browsers..

Question 12

What are the advantages of data compression?

Answer 12

• Less disk space
• Faster writing and reading
• Faster file transfer
• Variable dynamic range
• Byte order independent

Question 13

What are the disadvantages of data compression?

Answer 13

• Added complication
• Effect of errors in transmission
• Slower for sophisticated methods
• ‘Unknown’ byte / pixel relationship
• Need to decompress all previous data