NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
APRIL/MAY 2019 EXAMINATION

Course Code:              CIT834                                                           

Course Title:              Object Oriented Programming Using C#

Units:                          3

Time Allowed:            2½ Hours

Instruction:                Answer Question 1 and any other Four (4) questions

1a)       Define the following C# terms (i) Namespace (ii) Keyword (iii) Net Framework.  (6 marks)          

1b)       State five characteristics of object-oriented programming (10 marks)

1c)       Explain the difference between dynamic type variables and object type variables in C# (6 marks)

2a)       Enumerate two conditions on which the specific setup instructions used for C# development variation will depend on (4 marks)

2b)       Explain the role of Method overloading (4 marks)

2c)       Describe a destructor within the context of Object-Oriented Programming (4 marks)

3a)       State the characteristics of subroutines usage in C#.NET (6 marks)

3b)       What is the criterion for using the static property in C#.NET (3 marks)

3c)       Explain the concept of encapsulation in C# (3 marks)

4a)       Describe the constructors and their role in C# programming (4 marks)

4b)       Explain nullable types in C# (4 marks)

4c)       Describe the use of Methods in C# (4 marks)

5a)       List six important features of static constructors (6 marks)

5b)       Distinguish a struct from a class (4 marks)

5c)       List any four features of a typical C# program consists of (2 marks)

6a)       Describe two ways to pass parameters to a method in C# (6 marks)

6b)       what are reference types in C#? Give two examples. (4 marks)

6c)       Identify the base class for all exceptions in C# (2 marks)