Public Function CountEntriesAge(filename As String) As Integer Dim entry_counter As Integer = 0 Dim age_counter As Integer = 0

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1 Exam Prep MCQ study it File Processing always repeats just fit into the context Object and classes same just fit into the context Refer to oct/nov 2016 and may/june 2017 {Q4} Explanation you can do but code see below Dim m As Integer Dim n As Integer Try m = factorial(n) Catch e As PositiveIntegerException MsgBox (" Cannot pass a non - negative integer...") End Try Definition refer to oct/nov 2016 and may/june 2017 {Q6} May/June 2017 Question Public Function CountEntriesFile(filename As String) As Integer Dim count As Integer = 0 Dim strmrdr As System.IO.StreamReader 'Open the file for reading strmrdr = new System.IO. StreamReader(fileName) 'Read one line of text until the end of the file Do Until strmrdr.endofstream Dim line As String = strmrdr.readline() 'for both reading and adding to counter count += 1 Loop 'close the file strmrdr.close() return count 2.2 Public Function CountEntriesAge(filename As String) As Integer Dim entry_counter As Integer = 0 Dim age_counter As Integer = 0 If (System.File.Exists(filename)) Then entry_counter As Integer = CountEntires( filename ) age_counter As Integer = CountAges(age, filename ) MsgBox ("File does not exist") End If

2 age_counter += 1 Return age_counter 2.3 Public Function FrequencyOfAge(noTImes As Integer, noplayers As Integer) As Integer Dim i, x As Integer = 0 Dim freqword As Integer i = notimes(countentriesage(filename)) x = notimes(countentriesfile(filename)) freqword = x / i Return freqword Question Classes that are extended by other classes and can be inherited from in terms of properties and methods. 3.2 Class MustInherit RentalCar Protected Dim car_type As String Public Readonly Property CarType() As String Get Return car_type End Get End Property Public MustOverride Function CalculateRental (week As Integer) As Double End Class 3.3 Public Overrides Function CalculateRental (week As Integer) As Double If week < 1 Then rate = 700 if week > 1 Then rate = 600 rate = 500 End If

3 Return rate End Class Question Click on Tools and go to database 4.2 The DataGridView control provides a customizable table for displaying data. This control is designed to be a complete solution for displaying tabular data with Windows Forms. Also, the DataGridView class allows us to customization of cells, rows, columns, and borders using its properties You can extend the DataGridView control in many ways to build custom behaviours into your applications. The DataGridView control makes it easy to define the basic appearance of cells and the display formatting of cell values. The cell is the fundamental unit of interaction for the DataGridView. All cells derive from the DataGridViewCell base class. Each cell within the DataGridView control can have its own style, such as text format, background color, foreground color, font etc. Question 5 Public Sub DisplayMsg(stringMsg As String) if stringmsg.length() >= 40 Then MsgBox(stringMsg) MsgBox("Invalid") End if End Sub

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7 Question See above In.NET, there are two categories of types, reference types and value types. Structs are value types and classes are reference types. The general difference is that a reference type lives on the heap, and a value type lives inline, that is, wherever it is your variable or field is defined. A variable containing a value type contains the entire value type value. For a struct, that means that the variable contains the entire struct, with all its fields. A variable containing a reference type contains a pointer, or a reference to somewhere else in memory where the actual value resides. Class MustInherit BankAccount Protected Dim acc_type As String Public Readonly Property AccType() As String Get Return acc_type End Get End Property Public MustOverride Function CalculateInterest (amount As Double) As Double 3.4 Class SavingsAccount Inherits BankAccount Public MustOverride Function CalculateInterest (amount As Double) As Double If amount < 1000 Then interest = 0.1 if amount < Then interest = 0.12 interest = End If Return interest End Class