Computer Networks Answers

(i) Describe the following, stating an example where applicable in each case.

a)     Expert systems

b)    Geographical information systems

(i)       What is a robot?                                                                                        

(ii) State three advantages of robots over human workers.

People who work in front of a computer monitor for long periods usually expose themselves to some health hazards.

(i)Name four health hazards that could directly be linked to prolonged use of computers.    

(ii)List and explain four actions you would take to avoid the four different computer-related health hazards.

Distinguish between synchronous and asynchronous transmissions

State the meaning of the following in the context of data transmission: Full duplex, Half duplex and Simplex transmissions.

Give one example of the use of each concept above.

You have recently acquired a second-hand PC from a friend and immediately decided to upgrade some of its internal components.

a.) Name any three of the components.

b.) Explain one benefit to derive from the upgrade of each of the named components.

Define the term computer hardware. Give four examples.

In a small shop of your quarter, the shopkeeper has two record books; one for his daily sales and the other for his debtors and creditors. He adds up sales per day to know how much money he has made for that day. He equally adds up amounts loaned to him and borrowed out (in articles) to know how much he owes and how much he is owed respectively. He also subtracts money loaned to him from money owed him to know his debt balance. In the end, he adds the balance to his sales to know his business state of account. That is whether he runs on surplus or deficit.

a.) Has this shop got an information system? Explain. Give the type of information system in the case of a yes.

What is an information system? Explain two types of information systems.

What is cache memory? Could cache memory be considered a buffer?