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.

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
		ABQ 0 0 0 0 1 0       Truth table for an AND gate 1 0 1 1 1 1    AQ 0 1        Truth table for a NOT gate 1 0

Binary- Logic

Boolean Logic

completed 3 worksheets on object properties.

Binary addition sheet 2

Binary Addition (worksheet 2)

Use the rules for binary addition to add the following binary number

0001 +0001 0002=2	0010 +0010 0020=4	0100 +0110 0210=10
0011 +0110 0121=9	1011 +0001  1012=12	1001 +0111 1112
0010 +1011 1021=13	0110 +0010 0120=8	0110 +0011 0121=9
0110 +0110 0220=12	0111 +0010 0121=9	0011 +0101 0112=8

binary addition

Binary conversion work sheet: this was quite easy but the last couple were harder.

Adding binary numbers
Rules for adding:
0 + 0 = 0
1+ 0 = 1
0 + 1 = 1
1 + 1 = 10(binary) = 2(denary)

8 = 1
4 = 1
2 = 1
1 = 1

Add
0 1 0 1
0 0 1 0  = 0 1 1 1 = 7

=8 4 2 1
=1 1 1 1

Questions

a.      0 1 0 0
     + 1 0 0 1
   =   1 1 0 1 = 13
 
b.     0 0 1 1
     + 0 1 0 0
    =  0 1 1 1 = 7

Binary Addition (worksheet 1)

Use the rules for binary addition to add the following binary number

0001 +0110  0111	0001 +0100  0101	1001 +0110  1111
0011 +0100  0111	1011 +0000  1011	1001 +0110  1111
0010 +1000  1010	1100 +0010  1110	0110 +0001  0110
1000 +0010 1010	0101 +0010  0111	1010 +0100 1110