NATIONAL OPEN UNIVERSITY OF NIGERIA
14/16 AHMADU BELLO WAY, VICTORIA ISLAND, LAGOS
SCHOOL OF SCIENCE AND TECHNOLOGY
MARCH/APRIL 2014 EXAMINATION
COURSE CODE: CIT 844
COURSE TITLE: Advanced Database Management System
TIME ALLOWED: 2Hours
INSTRUCTION: Answer 4 Questions
1. (a) What is a Database? (6 marks)
(b) List and explain three (3) advantages of database approach (9 marks)
c) List and explain five (5) security measures used to protect database (10 marks)
2. (a) Write short note on the following:
(i) Data Integrity
(ii) Data Security
(iii) Data Validation
( 5 marks each)
(b) List five failures that could make the DBMS require recovery (10 marks)
3. (a) Define the following:
(i) Domain
(ii) Attribute
(iii) N-tuple
(iv) Relation Schema
(v) Relation State
(3 marks each)
(b) List five (5) techniques of a good encryption (10 marks)
4. (a) What is an Open Source? (7 marks)
(b) List and explain three (3) advantages of an Open Source Software (12 marks)
(c) Distinguish between Centralized and Distributed database System (6 marks)
5. (a) What is Relational Database? (7 marks)
(b) List and explain three (3) characteristics of Relations (12 marks)
(c) Mention three (3) basic update operations on relations (6 marks)
6. (a) What is SQL? (5 marks)
(b) List any five (5) operators and their description in SQL (10 marks)
(c) Outline five advantages of OODBMS
For the 2015 – till date past questions for this course CLICK HERE
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