Computer Applications 1 2004 past paper
Exam year:July 2004
1 (a) Describe ONE method of capturing data for each of the following :
(i) Cheque details for sorting purposes.
(ii) Method roading for customer billing.
(iii) Stock details for supermarket checkout.
(iv) Employees working hours for payroll calculation.(12marks)
(b) (i) Explain how a digitizer tablet maps an image into a computer.
(ii) Give ONE typical application of the device in b(i).(8marks)
2.(a) Give any FIVE factors to consider when selecting a data processing mode.(5marks)
(b) An operating system may offer a variety of batch and on-line facilities.
(i) Describe batch and online processing.
(ii) Give any ONE advantage of each mode in b(i).(10marks)<br< (c)(i) Distinguish between elements of network operating systems.
I Command processor
II Agent processor
(ii) State any THREE common precautions to be taken in the use of a network operating system.(5marks)
3.(a) (i) Explain the term “File organization”.
(ii) Describe any FIVE file processes. (12marks)
(b) Explain the need for creating two files i.e. “Master File” and “Transaction File” in data processing applications.(4marks)
(c) State the FOUR factors to consider when selecting a file organization and access method.(4marks)
4.(a) What is an Elapsed Time Communication Electronic Mailer (ETC Electronic Mailer) as applied in artificial intelligence.(3marks)
(b) ETC Electronic Mailer comprises of the following components :
Local reasoning system
Distributed reasoning system
Explain the function of each of the components.(12marks)
(c) Explain the principle of “telecommuting” in computer applications.(5marks)
5.(a) Explain the construction of the following types of hardwares used by wordprocessors.
(i) Shared logic wordprocessors
(ii) Communication wordprocessor(6marks)
(b) (i) Explain the term “desktop publishing (DTP)” in computer applications.
(ii) Describe the steps in using a desktop publishing system.(10marks),
(d) Explain how computers are applied in office management systems(4marks)
6.(a) (i) Explain the term “outsourcing” of IT operations and management.
(ii) Explain any THREE circumstances where outsourcing may be applicable.
(iv) Give any TWO advantages and TWO disadvantages of outsourcing(12marks)
(b) (i) Explain what an information centre is.
(ii) State any THREE roles of an information centre.(5marks)
(c)Give any THREE functions of a “software house”.(3marks)
7.(a) (i) Explain what is meant by a distributor database system.
(ii) Explain any THREE factors to consider in the design of a distributed database system.(8marks)
(b) Explain the following partitions in a distributed database system.
(ii) Vertical partitioning
(iii) Horizontal partitioning (6marks)
(c) Data is stored in a distributed database system and several processes may compute for a finite number of resources which may lead to deadlock state.
Describe the following methods of deadlock preventions in these systems.
(i) Centralised lock controller
(ii) Time stamping(6marks)<br.
8.(a) (i) Explain the purpose of a user interface management system (UIMS).
(ii) State the THREE basic features of UIMS.(5marks)
(b) (i) Explain what is meant by “Human Computer Interface (HCL)”
(ii) Explain the features of the following types of user interfaces.
I Command driven interfaces
II Menu driven interfaces
III Direct manipulation interfaces.(11marks)
(c)Explain the features of the TWO types of special purpose human computer interfaces.(4marks)