MIT4021– C# and .Net

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ASSIGNMENT

PROGRAM	Master of Science in Information Technology(MSc IT)Revised Fall 2011
SEMESTER	4
SUBJECT CODE & NAME	MIT4021– C# and .Net
CREDIT	4
BK ID	B1287
MAX.MARKS	60

Note: Answer all questions. Kindly note that answers for 10 marks questions should be approximately of 400 words. Each question is followed by evaluation scheme.

1 What is Common Language Runtime (CLR)? List the services that CLR provide.

Answer: The Common Language Runtime (CLR) is programming that manages the execution of programs written in any of several supported languages, allowing them to share common object-oriented class es written in any of the languages. The Common Language Runtime is somewhat comparable to the Java Virtual Machine that Sun Microsystems furnishes for running programs compiled from the Java language. Microsoft refers to its Common Language Runtime as a "managed execution environment." A program compiled for the CLR does not need a language-specific execution environment and can easily be moved to and run on any system with Windows 2000 or Windows XP.

Programmers writing in any of Visual Basic, Visual C++, or C# compile their programs into an intermediate form of code called Common

2 Explain (a) Assignment Operators (b) Bitwise Operators.

Answer: The assignment operator, '=', is the operator used for assignment. Like most other operators in C++, it can be overloaded.

= Operator

^= Operator

*= Operator

/= Operator

3 Explain different decision making statements used in C#.

Answer:

 The if-statement: The if statement is used to check the condition is true or false.

For example:

if(score == 100)

{

    // Any code between the curly braces gets executed by the program only when

    // the condition in the parentheses is true.

    Console.WriteLine("Perfect score!  You win

4 What is a structure in C#? Explain with an example.

Answer: A structure is a value type. The type is defined with the struct keyword. Structures are very similar to the classes; they differ in some aspects. Structures are meant to represent lightweight objects like Point, Rectangle, Color and similar. In many cases, structures may be more efficient than classes. Structures are value types and are created on the stack. Note that primitive data types like int, bool, float are technically struct types.

All struct types inherit from System.ValueType and further from System.Object. Structures are never abstract and they are always implicitly sealed. So struct

5 What is hiding a method? Explain.

Answer: Method hiding in C# is similar to the function overriding feature in C++. Functions of the base class are available to the derived class. If the derived class is not happy, one of the functions available to it from the base class can define its own version of the same function with the same function signature, just differing in implementation. This new definition hides the base class definition. Take the following program for example.

class BC

6 What is an event? Explain with example.

Answer: Events are declared using delegates.Events are the higher level of Encapsulation over delegate.

A delegate that exists in support of an event is called as an event handler. Event handlers are methods in an object that are executed in response to some events occurring in the application.

Syntax of an Event Handler using delegate:

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