NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
MAY/JUNE 2012 EXAMINATION

DAM 364 – MANAGEMENT INFORMATION SYSTEMS

Time Allowed: 2 Hours

Instruction: Answer Any Four Questions

1a What do you understand by Management Information System (MIS)?                                                             5 marks

 b. State four characteristics of MIS?                                                                                                                                       8 marks

 c. Outline four advantages of MIS                                                                                                                                           12 marks

2a. What is a computer network?                                                                                                                                             5 marks

  b. Outline the three components of a network                                                                                                                                12 marks

     c. Differentiate between teleconferencing and videoconferencing.                                                                    8 marks

3a. What is computer security?                                                                                                                                                  5 marks

  b. Briefly explain the three most popular cryptography systems                                                                              12 marks

  c. Differentiate between the resident and non-resident viruses                                                                                              8 marks

4a Distinguish between simplex and duplex modes of information communication                                           6 marks

    b. Distinguish between batch processing and time sharing                                                                                          6 marks

  c. What is a terminal? Differentiate between the two types with an example each                                         13 marks

5a What do you understand by storage unit?                                                                                                                      8 marks

  b. Distinguish between disk and disk drive                                                                                                                         8 marks

  c. Differentiate between flash disk and CD-ROM                                                                                                             9 marks

6a. Discuss firewall                                                                                                                                                                          13 marks

 b. Computers and the information they contain are often considered confidential systems because of its sensitivity. This confidentiality which can be compromised in a variety of ways can be curbed using a variety of security techniques. List six of such.                                                                                                                                                   12 marks