Chapter 2 Understanding Function and Operating of Various ICT Devices

A.MULTIPLE CHOICE
1. A
2. B
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 repsented?
2. Name and explain all supportin 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 repsented by the number code 87
2. A Processing device consists of the control unit(CU),the arithmetic Logic Unit(ALU),and the memory.
* Control Unit is to translate commands or instructions in a series and then continues them to the entir computer parts.
* Aritmatic Logic Unit (ALU)is to procces data by adding,subtracting,comparing and using logical formulas.
* Memory is to collect or to store data to run and application program.The capability depends on the memory capasity, which is stated in Byte,KByte,MByte and GByte unit.
3. ROM(Read Only Memory)
ROM is permanent memory that can be read but cannot be updated.ROM is to save compater operation program,such as BIOS and booting.
4. A Network Interface Card(NIC) such as:ethernet,arcnet and token ring.
5. A Wired Network the types of cables such as: UTP cable(Unshielded Twisted Pair),STP cable(Shielded Twisted Pair),Coaxcial cable,Optical fiber.