Microsoft 98-361 ExamMicrosoft MTA Software Development Fundamentals

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Q41. You are writing code to handle events in your program. You define a delegate named PolygonHandler like this: 

public delegate void PolygonHandler(Polygon p); 

You also create a variable of the PolygonHandler type as follows: 

PolygonHandler handler; 

Later in the program, you need to add a method named CalculateArea to the method invocation list of the handler variable. The signature of the CalculateArea method matches the signature of the PolygonHandler method. Any code that you write should not affect any existing event-handling code. Given this restriction, which of the following code lines should you write? 

A. handler = new PolygonHandler(CalculateArea); 

B. handler = CalculateArea; 

C. handler += CalculateArea; 

D. handler -= CalculateArea; 

Answer:


Q42. You have written a C# method that opens a database connection by using the SqlConnect object. The method retrieves some information from the database and then closes the connection. You need to make sure that your code fails gracefully when there is a database error. To handle this situation, you wrap the database code in a try-catch-finally block. You use two catch blocks—one to catch the exceptions of type SqlException and the second to catch the exception of type Exception. Which of the following places should be the best choice for closing the SqlConnection object? 

A. Inside the try block, before the first catch block 

B. Inside the catch block that catches SqlException objects 

C. Inside the catch block that catches Exception objects 

D. Inside the finally block 

Answer:


Q43. You are studying various sorting algorithms to understand, analyze, and compare the various sorting techniques. Which of the following techniques should you utilize when using the BubbleSort algorithm? 

A. comparison 

B. comparison and swap 

C. comparison and partition 

D. partition and swap 

Answer:


Q44. You create an ASP.NET Web Service that tracks the shipment of orders. The Web service includes a class nemed StatusService, which contains the following method: 

Public string GetStatus() 

/* additional code here */ 

You note that you can instantiate the StatusService class from a Web service client project, but the GetStatus method is not available. What could be the problem? 

A. Only properties can be part of the public interface of a Web service. 

B. You must mark the method with the WebService attribute. 

C. The methods of a Web service can return only object data. 

D. You must mark the method with the WebMethod attribute. 

Answer:


Q45. You are planning to develop a new software system for your organization. You need to review the system’s technical blueprint. Which of the following participants is responsible for providing the technical blueprint? 

A. user interface designer 

B. developer 

C. architect 

D. technical writer 

Answer:


Q46. You are developing a sorting algorithm that uses partitioning and comparison to arrange an array of numbers in the correct order. You write a method that partitions the array so that the items less than pivot go to the left side, whereas the items greater than pivot go to the right side. The partitioning method has the following signature: 

static int Partition (int[] numbers, int left, 

int right, int pivotIndex) Which of the following algorithms should you use to sort the array using the Partition method? 

A. static int[] QuickSort(int[] numbers, 

int left, int right) 

if (right > left) 

int pivotIndex = left + (right - left) / 2; 

pivotIndex = Partition( 

numbers, left, right, pivotIndex); 

QuickSort( 

numbers, left, pivotIndex - 1); 

QuickSort( 

numbers, pivotIndex + 1, right); 

return numbers; 

B. static int[] QuickSort(int[] numbers, 

int left, int right) 

if (right > left) 

int pivotIndex = left + (right - left) / 2; 

pivotIndex = Partition( 

numbers, left, right, pivotIndex); 

QuickSort( 

numbers, left, pivotIndex); 

QuickSort( 

numbers, pivotIndex + 1, right); 

return numbers; 

C. static int[] QuickSort(int[] numbers, 

int left, int right) 

if (right > left) 

int pivotIndex = left + (right - left) / 2; 

pivotIndex = Partition( 

numbers, left, right, pivotIndex); 

QuickSort( 

numbers, left, pivotIndex - 1); 

QuickSort( 

numbers, pivotIndex, right); 

} return numbers; } 

D. static int[] QuickSort(int[] numbers, 

int left, int right) 

if (right > left) 

int pivotIndex = left + (right - left) / 2; 

pivotIndex = Partition( 

numbers, left, right, pivotIndex); 

QuickSort( 

numbers, left, pivotIndex + 1); 

QuickSort( 

numbers, pivotIndex + 1, right); 

return numbers; 

Answer:


Q47. You are invoking a Web service method that returns an ArrayList object. The client application is written is C#, whereas the Web service is written in Visual Basic. The Web service is outside your corporate firewall. You receive an "object not found" error when you call the method that returns the ArrayList object but can call other methods successfully from the same Web service. What could be the problem? 

A. The client and the Web service are not written in the same programming language. 

B. The firewall is blocking all SOAP calls. 

C. The client project does not contain a reference to the System.Collection namespace. 

D. The ArrayList class cannot be serialized. 

Answer:


Q48. You need to display specific messages to users when their browser is not running JavaScript. Which of the following code segment should you use? 

A. <script runat="server"> ... </script> 

B. <script> ... </script> 

C. <% ... %> 

D. <noscript> ... </noscript> 

Answer:


Q49. You need to perform data validation to ensure that the input fields are not empty and the user's email address and phone numbers have been provided in the required format. You need to minimize the transmission of information across the networks. Which of the following coding approaches should you follow? 

A. Use JavaScript codethat executes on the Web server 

B. Use C# codethat executes on the Web server 

C. Use JavaScript code thatexecutes on the browser server 

D. Use C# code thatexecutes on the browser server 

Answer:


Q50. You are writing a C# program. You write the following method: 

public static void TestSwitch(int op1, int op2, char opr) 

int result; 

switch (opr) 

case '+': 

result = op1 + op2; 

case '-': 

result = op1 - op2; 

case '*': 

result = op1 * op2; 

case '/': 

result = op1 / op2; 

default: 

Console.WriteLine("Unknown Operator"); 

return; 

Console.WriteLine("Result: {0}", result); 

return; 

However, when you compile this code, you get the following error message: 

Control cannot fall through from one case label to another 

How should you modify the code to make sure that it compiles successfully? 

A. After each case, add the following code line: break; 

B. After each case, add the following code line: continue; 

C. After each case, add the following code line: goto default; 

D. After each case, add the following code line: return; 

Answer:


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