Learning Area 2 : Computer System - System concept and Hardware

1. L.A 2 COMPUTER SYSTEMS

4. Meaning of Input Process Output Storage Input is any data or instruction entered into the computer system for processing. The processing unit controls all activities within the system. Output is data that has been processed into a useful form, called information Storage is a location which data, instruction and information are saved for future use

5. Information Processing Cycle Process Output Input Storage Block diagram of Information Processing Cycle (CPU)

19. Clock Speed Measurement L.O :State the units of clock speed measurement Every microprocessor contains a system clock. The system clock controls the speed of all the operations within a computer. The speed of the clock is measured by how many cycles per second the clock makes. The clock speed unit is measured in hertz . A hertz is one cycle per second. megahertz (MHz) equals to one million cycles of the system clock Gigahertz (GHz) equals to one billion cycles of the system clock

20. Which is faster ? Pentium 4 running at 2.4 GHz is approximately one-third faster than a Pentium 4 running at 1.8 GHz. One way of comparing the performance of personal computers is by comparing their microprocessor speeds . Microprocessor speeds are determined by their clock speed and are usually expressed in gigahertz (GHz), billion of machine cycles per second.

29. L.O :Identify the location of ports A port is an interface on a computer to which you can connect a device such as printer, flash drive and mouse

33. L.O : Explain types and function of Primary Storage