May 2016 updated: programming in c# 70-483 dumps

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2016 May 70-483 Study Guide Questions:

Q1. DRAG DROP - (Topic 1) 

You have a method named GetCustomerIDs that returns a list of integers. Each entry in the list represents a customer ID that is retrieved from a list named Customers. The Customers list contains 1,000 rows. 

Another developer creates a method named ValidateCustomer that accepts an integer parameter and returns a Boolean value. ValidateCustomer returns true if the integer provided references a valid customer. ValidateCustomer can take up to one second to run. 

You need to create a method that returns a list of valid customer IDs. The code must execute in the shortest amount of time. 

What should you do? (Develop the solution by selecting and ordering the required code snippets. You may not need all of the code snippets.) 

Answer: 


Q2. - (Topic 2) 

You are developing an application that generates code. The application includes the following code segment. (Line numbers are included for reference only.) 

You need to ensure that code generated by the GenerateCode() method represents a class that can be accessed by all objects in its application domain. 

Which two code segments can you insert at line 05 to achieve this goal? (Each correct answer presents a complete solution. Choose two.) 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer: A,C 


Q3. - (Topic 2) 

You are implementing a new method named ProcessData. The ProcessData() method calls a third-party component that performs a long-running operation. 

The third-party component uses the IAsyncResult pattern to signal completion of the long-running operation. 

You need to ensure that the calling code handles the long-running operation as a System.Threading.Tasks.Task object. 

Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.) 

A. Call the component by using the TaskFactory.FromAsync() method. 

B. Create a TaskCompletionSource<T> object. 

C. Apply the async modifier to the method signature. 

D. Apply the following attribute to the method signature: [MethodImpl(MethodImplOptions.Synchronized)] 

Answer: A,B 

Explanation: A: TaskFactory.FromAsync Method 

Creates a Task that represents a pair of begin and end methods that conform to the 

Asynchronous Programming Model pattern. Overloaded. 

Example: 

TaskFactory.FromAsync Method (IAsyncResult, Action<IAsyncResult>) 

Creates a Task that executes an end method action when a specified IAsyncResult 

completes. 

B: In many scenarios, it is useful to enable a Task<TResult> to represent an external asynchronous operation. TaskCompletionSource<TResult> is provided for this purpose. It enables the creation of a task that can be handed out to consumers, and those consumers can use the members of the task as they would any other. However, unlike most tasks, the state of a task created by a TaskCompletionSource is controlled explicitly by the methods on TaskCompletionSource. This enables the completion of the external asynchronous operation to be propagated to the underlying Task. The separation also ensures that consumers are not able to transition the state without access to the corresponding TaskCompletionSource. 

Note: 

* System.Threading.Tasks.Task Represents an asynchronous operation. 


Q4. - (Topic 2) 

You are creating a class library that will be used in a web application. 

You need to ensure that the class library assembly is strongly named. 

What should you do? 

A. Use the gacutil.exe command-line tool. 

B. Use the xsd.exe command-line tool. 

C. Use the aspnet_regiis.exe command-line tool. 

D. Use assembly attributes. 

Answer: D 

Explanation: The Windows Software Development Kit (SDK) provides several ways to sign an assembly with a strong name: 

* Using the Assembly Linker (Al.exe) provided by the Windows SDK. 

* Using assembly attributes to insert the strong name information in your code. You can use either the AssemblyKeyFileAttribute or the AssemblyKeyNameAttribute, depending on where the key file to be used is located. 

* Using compiler options such /keyfile or /delaysign in C# and Visual Basic, or the 

/KEYFILE or /DELAYSIGN linker option in C++. (For information on delay signing, see 

Delay Signing an Assembly.) 

Note: 

* A strong name consists of the assembly's identity—its simple text name, version number, and culture information (if provided)—plus a public key and a digital signature. It is generated from an assembly file (the file that contains the assembly manifest, which in turn contains the names and hashes of all the files that make up the assembly), using the corresponding private key. Microsoft. Visual Studio. .NET and other development tools provided in the .NET Framework SDK can assign strong names to an assembly. 

Assemblies with the same strong name are expected to be identical. 


Q5. - (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: A 

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) 


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Q6. DRAG DROP - (Topic 2) 

You are developing a C# application. The application includes a class named Rate. The following code segment implements the Rate class: 

You define a collection of rates named rateCollection by using the following code segment: 

Collection<Rate> rateCollection = new Collection<Rate>() ; 

The application receives an XML file that contains rate information in the following format: 

You need to parse the XML file and populate the rateCollection collection with Rate objects. 

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: 


Q7. - (Topic 1) 

You are developing an application. The application includes classes named Mammal and Animal and an interface named IAnimal. 

The Mammal class must meet the following requirements: . It must either inherit from the Animal class or implement the IAnimal interface. . It must be inheritable by other classes in the application. You need to ensure that the Mammal class meets the requirements. 

Which two code segments can you use to achieve this goal? (Each correct answer presents a complete solution. Choose two.) 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer: A,C 

Explanation: 

When applied to a class, the sealed modifier prevents other classes from inheriting from it. http://msdn.microsoft.com/en-us/library/88c54tsw(v=vs.110).aspx 


Q8. - (Topic 2) 

You have the following code (line numbers are included for reference only): 

You need to ensure that new instances of Connection can be created only by other classes by calling the Create method. The solution must allow classes to inherit from Connection. 

What should you do? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer: B 

Explanation: The following list provides the main features of a static class: 

* Contains only static members. 

* Cannot be instantiated. 

* Is sealed. 

* Cannot contain Instance Constructors. 

Creating a static class is therefore basically the same as creating a class that contains only static members and a private constructor. A private constructor prevents the class from being instantiated. 

Reference: Static Classes and Static Class Members (C# Programming Guide) 

https://msdn.microsoft.com/en-us/library/79b3xss3.aspx 


Q9. DRAG DROP - (Topic 2) 

You are creating a class named Data that includes a dictionary object named _data. 

You need to allow the garbage collection process to collect the references of the _data object. 

You have the following code: 

Which code segments should you include in Target 1 and Target 2 to complete the 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: 


Q10. HOTSPOT - (Topic 2) 

You define a class by using the following code: You write the following code for a method (line numbers are included for reference only): 

To answer, complete each statement according to the information presented in the code. 

Answer: 


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Q11. HOTSPOT - (Topic 1) 

You are developing an application in C#. 

The application will display the temperature and the time at which the temperature was recorded. You have the following method (line numbers are included for reference only): 

You need to ensure that the message displayed in the lblMessage object shows the time formatted according to the following requirements: 

The time must be formatted as hour:minute AM/PM, for example 2:00 PM. 

The date must be formatted as month/day/year, for example 04/21/2013. 

The temperature must be formatted to have two decimal places, for example 23-

45. 

Which code should you insert at line 04? (To answer, select the appropriate options in the answer area.) 

Answer: 


Q12. - (Topic 1) 

You are developing an application that uses several objects. The application includes the following code segment. (Line numbers are included for reference only.) 

You need to evaluate whether an object is null. Which code segment should you insert at line 03? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer: D 

Explanation: Use the == operator to compare values and in this case also use the null literal. 


Q13. - (Topic 2) 

You are writing the following method (line numbers are included for reference only): 

You need to ensure that CreateObject compiles successfully. 

What should you do? 

A. Insert the following code at line 02: where T : new() 

B. Replace line 01 with the following code: public void CreateObject<T>() 

C. Replace line 01 with the following code: public Object CreateObject<T>() 

D. Insert the following code at line 02: where T : Object 

Answer: A 


Q14. DRAG DROP - (Topic 2) 

You are adding a method to an existing application. The method uses an integer named statusCode as an input parameter and returns the status code as a string. 

The method must meet the following requirements: 

Return "Error" if the statusCode is 0. 

Return "Success" if the statusCode is 1. 

Return "Unauthorized" if the statusCode is any value other than 0 or l. 

You need to implement the method to meet the requirements. 

How should you complete the relevant code? (To answer, drag the appropriate statements to the correct locations in the answer area. Each statement 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: 


Q15. - (Topic 2) 

You are developing an application that will use multiple asynchronous tasks to optimize performance. 

You create three tasks by using the following code segment. (Line numbers are included for reference only.) 

You need to ensure that the ProcessTasks() method waits until all three tasks complete before continuing. 

Which code segment should you insert at line 09? 

A. Task.WaitFor(3); 

B. tasks.Yield(); 

C. tasks.WaitForCompletion(); 

D. Task.WaitAll(tasks); 

Answer: D 



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