Chapter 2 Understanding Function And Operation of Various ICT Devices

A. Multiple Choice

1. A
2. C
3. B
4. B
5. E
6. E
7. C
8. B
9. A
10. C

B. Essay

1. In ASCII code,by what code is letter W represented?
2. Name and Explain all supporting devices inside a CPU.
3. What is the abbreviation and the function of ROM?
4. Name three examples of network interface cards.
5. Name several cables that use on a wired network. 

Answer.

1. The letter W is represented by the number code 87.
2. ~Control Unit is to translate commands or intructions in a series and than continues them to the entire computer parts. This part is how the processor controls the entire computer operation                       ~Arithmetic Logic Unit (ALU) is to process data by adding, substracting, comparing, and using logocal formulas.                                                                                                                                            ~Memory is to collect or to store data to run an application program. 
3. ~ROM (Read Only Memory).                                                                                                       ~ROM is to save computer operation program,such as BIOS and booting.
4. Such as Ethernet, arcnet and token ring.
5. a.) UTP Cable (Unshielded Twisted Pair) = It consist of a pair of plastic wrapped conductor and each is colored. The frequency ranges from 100 Hz to 5 Hz.                                                                        b.) STP Cable (Shielded Twisted Pair) = STP Cable is similar with UTP Cable, except that is has double wrap.                                                                                                                                       c.) Coaxial Cable = It consist of a main copper conductor with three wraps.                                         d.) Optical Fiber = It is made of plastic or glass that acts as a medium for signal transmission in the from of  light.