NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
OCTOBER/NOVEMBER 2014 EXAMINATION

COURSE CODE: CIT 834
COURSE TITLE: Object Oriented Programming using C#
TIME ALLOWED: 3Hours
INSTRUCTION: Answer any five (5) questions.

1a. Outline the seven (7) characteristics of Object-Oriented Programming (7 marks)
1b. Mention any Seven (7) principal advantages of object oriented programming (7 marks)
2a. Give a brief explanation of the following fundamental concepts of OOP: (8 marks)
ï‚· Classes
ï‚· Data abstraction
ï‚· Encapsulation
ï‚· Polymorphism
2b. What are the three (3) basic steps of programming in an objected-oriented language ? (3 marks)
2c. clearly discuss how a method is declared in C# (3 marks)

3a. Outline the procedures to set up a development workstation to use C# (8 marks)
3b. Explain the following: (6 marks)
ï‚· Adding a C# Class Using Solution Explorer
ï‚· Adding a C# Class Using Class View

4a. Mention the first six (6) procedures for saving in C# (6 marks)
4b. Discuss the following: (8 marks)
ï‚· .NET
ï‚· Calling a Method
ï‚· Public Methods
ï‚· Constructor

5a. Explicitly discuss “Private Methods” (3 marks)
5b. Explain the role of a Garbage Collector (4 marks)
5c. Using mass calculation as an example, how is a static method declared in C#? (7 marks)

6a. what are the seven (7) properties of static constructors? (7 marks)
6b. Write a brief note on “Default Constructor” and “Garbage Collection” (4 marks)
6c. write a simple program that displays “Hello World” (3 marks)
7. Write the program codes to creating a new class to represent a rectangular shape that will define the rectangle’s length, width and area (14 marks)