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CUSTOMER_CODE
SMUDE
DIVISION_CODE
SMUDE
EVENT_CODE
APR2016
ASSESSMENT_CODE MIT4021_APR2016
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
37988
QUESTION_TEXT
Explain the built in data types available in C#
SCHEME OF EVALUATION
1.
2.
3.
4.
Integer – 4 marks
Real – 3 marks
Boolean – 2 marks
Characters – 1 mark
QUESTION_T
DESCRIPTIVE_QUESTION
YPE
QUESTION_ID 73727
QUESTION_T Explain one dimensional arrays with relevant examples. Describe regular
EXT
expressions in C#.
One Dimensional Arrays:
A list of items can be given one variable using only one subscript and such a
variable is called a single subscript variable or a one dimensional array.
Arrays are declared using the following syntax: < type > [] identifier ;
In C# a single subscripted variable can be expressed as a:
x[1], x[2], x[3] ………. x[4]
The subscript can begin with number 0. That is x[0] is allowed.
(2 Marks)
For example, if we want to represent a set of five numbers, say (35, 40, 20,
57, 19) by an array variable number, then we may create the variable
SCHEME OF
number as follows:
EVALUATION int [] number = new int [5] ;
The initial value of the array is null. An array object is created using new:
int [] store = new int [50] ;
string [] names = new string [50] ;
When the array is created, it initially contains the default value for the types
that are in the array. For the store array, each element is an int with the
value 0. For the names array, each element is a string with the value null.
The values of the array can be assigned as follows:
number[0] = 35 ;
number[1] = 40 ;
number[2] = 20 ;
number[3] = 57 ;
number[4] = 19 ;
These elements may be used in programs just like any other C# variable.
aNumber = number [0] + 10 ;
number[4] = number[0] + number[2] ;
number[2] = x[5] + y[10] ;
value [6] = number [i] * 3 ;
(2 Marks)
Array Initialization:
Arrays can be initialized at the same time as they are created. During
initialization, the new int[x] can be omitted, and the computer will
determine the size of the array allocate from the number of items in the
initialization list: int [] store = { 0, 1, 2, 3, 10, 12 } ;
The preceding line is equivalent to: int [] store = new int [6] { 0, 1, 2, 3, 10,
12 } ;
(2 Marks)
Regular Expressions:
Regular expressions provide a powerful tool for searching and manipulating
a large text. A regular expression may be applied to a text to accomplish
texts such as:
1. To locate substring and return them.
2. To modify one or more substrings and return them.
3. To identify substrings that begin with or, end with a pattern of
characters.
4. To find all words that begin with a group of characters and end with
some other characters.
5. To find all the occurrences of a substring pattern
A regular expression is a string containing two types of characters:
 Literals
 Metacharacters
Literals are characters that we wish to search and match in the text.
Metacharacters are special characters that give commands to the regular
expression parser.
(2 Marks)
Example of Regular Expression: The table below shows sample regular
expressions along with their meaning.
In these expressions, \b, \B, \S* and | are metacharacters and m, er, X, space
and comma are literals.
(2 Marks)
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
118700
QUESTION_TEXT
SCHEME OF
EVALUATION
Write a C# program to calculate the area of a rectangle using
overloaded constructors.
Ans:
(10 marks, chapter 9, page 159,160)
using System;
class Rectangle
{
Public int length, width;
public Rectangle(int x, int y)
{
length=x;
width=y;
}
public Rectangle(int x)
{
length=width=x;
}
Public intRectArea()
{
int area=length*width;
return area;
}
}
Class RectArea
{public static void Main()
{
Rectangle rect1=new Rectangle(15);
Rectangle rect2=new Rectangle(15,10);
int area1=rect1.RectArea();
int area2=rect2.RectArea();
Console.WriteLine(“Area1=”+area1);
Console.WriteLine(“Area2=”+area2);
Console.Read();
}
}
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
118701
QUESTION_TEXT
List the steps for creating a web based application. Explain any 2 of
them
Ans:
The following are the steps to create a web based application
SCHEME OF
EVALUATION
create the Default.aspx page
add code for the Default.aspx page
create the show.aspx page
add code to the show.aspx page
create the terms.aspx page
(Listing carries 2 marks and explaining any 2 steps carry 4 marks
each. hence 2*4=8 marks)
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
118702
QUESTION_TEXT
Explain the steps involved in creating and using delegates with
relevant examples.
Ans:
4 steps:
delegate declaration
SCHEME OF
EVALUATION
delegate methods definition
delegate instantiation
delegate invocation
(explaining each with examples carries 2.5 marks each hence
2.5*4=10 marks)
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
118704
Explain the user-defined reference types.
QUESTION_TEXT
1.
SCHEME OF EVALUATION 2.
3.
Classes
Delegates
Arrays
4.
Interfaces
(2.5*4=10)