One of the functions of an operating system is job scheduling. Explain what is mean by job scheduling.

List two examples of:Third generation languages and Object oriented languages

​b) List and explain three types of user interfaces. 
c) Describe the following categories of software:
i) Firmware 
ii) Proprietary software 
d) a new company XYZ intends to go into the business of desktop publishing. Advise the company on three computer hardware system specification features to consider as a measure of enhancing performance.

(a) One of the functions of an operating system  is  job  scheduling. 
Explain what is meant by job- scheduling
Running of a particular job/ task under a system of priority, computer resource availability, time allocated to user etc.
(b) List and explain three types of user interfaces

• Command driven- Command language dialogues are those in which the user types instructions to the computer in a formally defined language
• Menu driven- These allow the user to issue commands by selecting choices from a menu of displayed alternatives
• Graphical User interface- These are those in which the user manipulates, though button pushes and movements of pointing devise such as a house, a graphic or iconic representation of the underlying data.

(c) Describe the following categories of software

• (i) Firmware
• Soft ware that is burnt in computer ROM chips, usually system software
• (ii) Proprietary Software
• Any software  as opposed  to freeware, which  is available freely

(d) A new company XYZ intends to go into the business of desktop publishing. Advise the company on three computer hardware system specification features to consider as a measure of enhancing performance.

• Consider RAM capacity
• Consider speed of computer
• Consider hard disk capacity

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