Thursday 20 November 2014

software

Software

learning objectives:
- understand what an operating system is.
- identify different functions of an operating system
- find out what application and system software is.

Operating System Video Worksheet

Answer the following question while watching the video

 Why can we not communicate directly with a computer?

Because it doesn’t speak any language, it speaks in ones and zero’s.  

What is the operating system?

The operating system is a programme that lets you interact with your computer.

What are the two popular personal computer Operating Systems?

The two most popular personal computer operating systems are Microsoft windows and mac os10.

What other devices do you use which have an Operating System?

Mobile devices and tablets also have operating systems.

What do you need to do before downloading software/apps?

Before downloading software/apps you must check to see if it is compatible with your computer.

What does compatibility mean?

Compatibility means if you are downloading something on your computer you have to see if you can get that app with your particular computer.


The 5 main functions of an operating system are:
  1. provides a user interface
  2. booting the computer
  3. provides file management
  4. handles system resources
  5. preforms basic computer tasks.





Thursday 6 November 2014

Logic gates

http://www.bbc.co.uk/schools/gcsebitesize/design/electronics/logicrev2.shtml



Logic gates

Truth table for an OR gate

The relationship between the inputs and the output can be captured in a truth table. A and B represent the inputs and Q is the output.
ABQ 
0 0 0
0 1 1
1 0 1
1 1 1
 


               
 
Circuit symbol of OR gate

ABQ
0 0 0
0 1 0       Truth table for an AND gate
1 0 1
1 1 1   


Circuit symbol of AND gate

AQ
0 1    
   Truth table for a NOT gate
1 0    


Circuit symbol of NOT gate