Computer Science Lectures

  INSTRUCTIONS TO MAKE THE ABOVE PAINTING 1. Using the line tool, split the paper in two. Fill each piece with the corresponding colors. 2. Make the bottom of the house with the rectangle. Fill with the appropriate color. 3. With the tool of the triangle make the roof and fill it with the appropriate color. 4. With the rectangle make the windows, the door and the chimney and   fill with color. 5. With the tool of circle make the sun and fill it with the appropriate color 6. Make the mountain with a curve. Be careful that both ends of the curve touch the ground. Fill the mountain with the right color 7. With the circle tool (3 cycles) make the cloud. Fill them with white color. 8. Make the trunk of the tree with the rectangle. Fill it with color 9. With the circle (2 circles) make the leaves of the tree. Fill them with color. 10. Save the painting with the name HOME in your folder. Minimize the painting but DO NOT close it. 11. In the everybody folder find...

  • Data Processing Cycle : The computer receives data as input which processes and produces information as output. This information can then be used as input along with other data in a new process (see figure below). This is called a data processing cycle.   • The computer consists of : The Central Unit, the input units and the output units • Input units : We enter data from them into the Computer. Input units are: 1. Keyboard 2. Mouse 3. Scanner 4. Digital camera 5. Microphone • Output units: From these we get the results of processing the information from the computer. Output units are: 1. Screen 2. Printer 3. Speakers The touch screen is an input and output unit • There are 4 types of printers: 1. Impact printers: are slow, noisy and are used to print duplicate receipts 2. Inkjet printers. They are cheap but they run out of ink easily (we can not print many pages) and are relatively slow 3. Laser printers. They are more expensive but their ...