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Q41. – (Topic 1) 

You are developing an application that uses the Microsoft ADO.NET Entity Framework to retrieve order information from a Microsoft SQL Server database. The application includes the following code. (Line numbers are included for reference only.) 

The application must meet the following requirements: 

. Return only orders that have an OrderDate value other than null. 

. Return only orders that were placed in the year specified in the year parameter. 

You need to ensure that the application meets the requirements. Which code segment should you insert at line 08? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:

Q42. DRAG DROP – (Topic 1) 

You are developing an application that includes a class named Customer. 

The application will output the Customer class as a structured XML document by using the following code segment: 

You need to ensure that the Customer class will serialize to XML. 

How should you complete the relevant code? (To answer, drag the appropriate code segments to the correct locations in the answer area. Each code segment may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.) 

Answer: 

Q43. – (Topic 2) 

You are developing an application that includes methods named ConvertAmount and TransferFunds. 

You need to ensure that the precision and range of the value in the amount variable is not lost when the TransferFunds() method is called. 

Which code segment should you use? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:

Explanation: The double keyword signifies a simple type that stores 64-bit floating-point values. 

The float keyword signifies a simple type that stores 32-bit floating-point values. 

Reference: double (C# Reference) 

Q44. HOTSPOT – (Topic 2) 

You are developing the following classes named: 

Class1 

Class2 

Class3 

All of the classes will be part of a single assembly named Assembly.dll. Assembly.dll will be used by multiple applications. 

All of the classes will implement the following interface, which is also part ofAssembly.dll: 

public interface Interface1 { void Method1(decimal amount); void Method2(decimal amount); } 

You need to ensure that the Method2 method for the Class3 class can be executed only when instances of the class are accessed through the Interface1 interface. The solution must ensure that calls to the Method1 method can be made either through the interface or through an instance of the class. 

Which signature should you use for each method? (To answer, select the appropriate signature for each method in the answer area.) 

Answer: 

Q45. – (Topic 2) 

You are developing an application that includes the following code segment: 

You need to implement the Open() method of each interface in a derived class named UseResources and call the Open() method of each interface. 

Which two code segments should you use? (Each correct answer presents part of the solution. Choose two.) 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer: A,C 

Explanation: 

* An interface contains only the signatures of methods, properties, events or indexers. A class or struct that implements the interface must implement the members of the interface that are specified in the interface definition. 

* Example: interface ISampleInterface { void SampleMethod(); } 

class ImplementationClass : ISampleInterface 

// Explicit interface member implementation: 

void ISampleInterface.SampleMethod() 

// Method implementation. 

static void Main() 

// Declare an interface instance. 

ISampleInterface obj = new ImplementationClass(); 

// Call the member. 

obj.SampleMethod(); 

Q46. DRAG DROP – (Topic 1) 

You are developing a class named Temperature. 

You need to ensure that collections of Temperature objects are sortable. 

How should you complete the relevant code segment? (To answer, drag the appropriate code segments to the correct locations in the answer area. Each code segment may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.) 

Answer: 

Q47. DRAG DROP – (Topic 2) 

You have the following class. (Line numbers are included for reference only.) 

You need to complete the doOperation method to meet the following requirements: 

. If AddNumb is passed as the operationName parameter, the AddNumb function is called. . If SubNumb is passed as the operationName parameter, the SubNumb function is called. 

Which code should you insert at line 16? Develop the solution by selecting and arranging the required code blocks in the correct order. You may not need all of the code blocks. 

Answer: 

Q48. – (Topic 2) 

An application contains code that measures reaction times. The code runs the timer on a thread separate from the user interface. The application includes the following code. (Line numbers are included for reference only.) 

You need to ensure that the application cancels the timer when the user presses the Enter key. 

Which code segment should you insert at line 14? 

A. tokenSource.Token.Register( () => tokenSource.Cancel() ); 

B. tokenSource.Cancel(); 

C. tokenSource.IsCancellationRequested = true; 

D. tokenSource.Dispose(); 

Answer:

Q49. – (Topic 2) 

You are developing an application. 

The application contains the following code segment (line numbers are included for reference only): 

When you run the code, you receive the following error message: "Cannot implicitly convert type 'object'' to 'int'. An explicit conversion exists (are you missing a cast?)." 

You need to ensure that the code can be compiled. 

Which code should you use to replace line 05? 

A. var2 = arrayl[0] is int; 

B. var2 = ((List<int>)arrayl) [0]; 

C. var2 = arrayl[0].Equals(typeof(int)); 

D. var2 = (int) arrayl [0]; 

Answer:

Q50. – (Topic 2) 

You have an application that will send confidential information to a Web server. 

You need to ensure that the data is encrypted when it is sent across the network. 

Which class should you use? 

A. CryptoStream 

B. AuthenticatedStream 

C. PipeStream 

D. NegotiateStream 

Answer:

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