70-485 Exam
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2021 Oct 70-485:
Q11. You need to implement the behavior requirements for the photo viewer.
Which controls should you create?
A. Create two SemanticZoom controls and one ListView control.
B. Create one SemanticZoom control and one ListView control.
C. Create one ScrollViewer control, one SemanticZoom control, and one GridView control.
D. Create two GridView controls and one SemanticZoom control.
Answer: D
Q12. Exceptions occur when the WriteAuditAsync() method of the Auditor object is run.
The UI must remain responsive to user actions.
You need to handle the exceptions.
Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: A
Q13. You are designing a Windows Store app to manage image and video files.
The app must meet the following requirements:
Video files must be stored locally on each device.
The app must use local storage for data caching.
User settings must be shared across multiple devices.
Image files must be available across multiple devices.
Metadata for images must be stored in a central database.
Image files, video files, and their associated metadata must load as quickly as possible.
You need to identify which data must be cached based on the app requirements.
Which two types of data should you identify? (Each correct answer presents part of the solution. Choose two.)
A. User settings
B. Video files
C. Image files
D. Metadata
Answer: CD
Q14. You develop several Windows Store apps.
You need to use a control to display multiple elements.
The control has the following requirements: Each item must be displayed as a button. When a user clicks a button, the button must show that it was clicked. Developers must be able to bind the control to a collection.
. Developers must be able to handle an event when items are selected.
. Developers must be able to specify whether the control provides users with the ability to select either one or multiple items.
What should you use? (More than one answer choice may achieve the goal. Select the BEST answer.)
A. A custom control that inherits from ListBox
B. A control template for the ComboBox control
C. A custom control that inherits from ComboBox
D. A control template for the ListBox control
Answer: D
Q15. You need to update the DoWork() method of the background task to meet the requirements.
What should you do? (Each correct answer presents part of the solution. Choose all that apply.)
A. Get the IsCancellationRequested property from the CancellationToken object and return a TaskCompletionSource object.
B. Access the Progress object and report the task's progress to the caller.
C. Update the DoWork() method to receive a Progress object.
D. Add the CancellationToken object to the client.GetAsync() method.
E. Confirm that the IsCancellationRequested property of the CancellationToken object is true and exit the task.
F. Update the DoWork() method to receive a CancellationToken object in the arguments of the method.
Answer: DEF
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Q16. You are developing a Windows Store app that uses a webcam.
You need to be notified if new webcams are connected to the system.
Which class should you use?
A. ManagementObjectFinder
B. FileSystemWatcher
C. DeviceWatcher
D. ServiceDevice
Answer: C
Q17. Users report performance issues when getting the location information associated with a photo. You suspect the app is encountering performance issues in the GetLocationAsync() method of the Environment class.
You need to enhance the performance of the GetLocationAsync() method of the app.
What should you do?
A. Remove the Compass initialization from the LoadSensors() method and initialize it within the GetLocationAsync() method.
B. set the Reportlnterval property of the Compass object to 16.
C. set the Reportlnterval property of the Compass object to 0.
D. Move the locator variable to a class level variable and initialize it in the Environment constructor.
Answer: D
Q18. You create a mobile service to send push notifications to the app.
You configure the service and the app to work with Windows Push Notification Services (WNS).
You add the following code to the App.xaml.cs file:
You need to ensure that the app can access the push notification channel.
What should you do first?
A. Add a call to GetChannel in the OnLaunched event handler of the app.
B. Set the Uri property of pushChannel in the OnActivated event handler of the app.
C. Set the Uri property of pushChannel in the OnLaunched event handler of the app.
D. Add a call to GetChannel in the OnActivated event handler of the app.
Answer: A
Q19. You are evaluating the following code that is part of a method named SelectMove:
var moves=Logic.GetMoves();
Position selectedMove=moves.First<Position>();
Double maxResult=0;
Foreach(var move in moves)
{
Double result=Logic.EvaluatePosition(move);
If (result>maxResult)
{
maxResult=result;
selectedMove=move;
}
}
You need to recommend a replacement for the for each loop to reduce the amount of time that it takes for SelectMove to execute.
Which code segment should you recommend?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: D
Q20. You are developing a Windows Store app that uses the Windows Push Notification Service (WNS) to send toast notifications.
You need to ensure that the requests that the app sends to the WNS follow the authorization standard that WNS supports.
Which authorization standard should you use?
A. ADFS
B. ws-Trust
C. openID
D. OAuth 2.0
Answer: D