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Mobile Development Fundamentals

Question No: 91 – (Topic 1)

Which class is used to embed a video in a Windows Phone 7.5 Silverlight application?

1. videoSink

2. VideoDrawing

3. MediaElement

4. MediaPlayer

Answer: A

Question No: 92 – (Topic 1)

You create a method named WriteDateTime for a Windows Phone application.

You need to use the method to write the current date and time to a text file named lasttime.txt.

Which code segment should you use?

1. Option A

2. Option B

3. Option C

4. Option D

Answer: C

Question No: 93 – (Topic 1)

Which two standard screen orientations can be used in Windows Phone applications? (Choose two.)

1. Portrait

2. upright

3. Landscape left

4. Duplex

5. Rotated

Answer: A,C

Explanation: Windows Phone supports portrait and landscape screen orientations.

Question No: 94 – (Topic 1)

You develop an application that has two threads. One thread calls a method to enumerate a list. The second thread continues to run the main program, and then accesses the enumerated data list generated by the first thread.

How do you refer to this programming architecture?

1. Linear

2. Synergistic

3. Asynchronous

4. Polymorphic

Answer: C

Question No: 95 – (Topic 1)

Which two restrictions are placed on developer unlocked devices? (Choose two.)

1. a maximum of three devices can be unlocked by using one App Hub account.

2. Internet access is restricted to HTTP Port 80.

3. Use of native code is disallowed.

4. Only a certain number of applications can be sideloaded at a time.

Answer: A,D

Explanation: Now, any developer can unlock and register 1 phone to load up to 2 apps. Registered developers with Dev Center accounts continue to have the option to unlock up to 3 phones and upload up to 10 apps on each.

Question No: 96 – (Topic 1)

Which dictionary is used to store persistent data between the sessions of an application?

1. PhoneApplicationService.Current.State

2. viewState

3. PhoneApplicationPage.State

4. IsolatedStorageSettings.ApplicationSettings

Answer: D

Question No: 97 – (Topic 1)

You need to reduce color banding of images when using Windows Phone that supports a 16-bit color-display panel. What are two possible ways to achieve this goal? (Choose two.)

1. Use dithering when creating images.

2. Avoid gradients in images.

3. Use the JPG format for images.

4. Use transparency when creating images.

Answer: A,B

Explanation: A:Youcanuse dithering.

B: Onesolution is to not use gradients directly.

Question No: 98 – (Topic 1)

A message pattern in which all the communication is initiated by the client device to the networked resource is referred to as a/an:

1. echo reply.

2. automated service.

3. multicast.

4. request/reply,

Answer: D

Question No: 99 – (Topic 1)

You create two game applications named Application A and Application B for your Windows Phone.

Application A allows users to unlock achievements as they progress through the game. The starting point of Application B is relative to the achievements unlocked by the user in Application A.

You need to share the data between the two applications. What should you do?

1. Store the data of Application A in an isolated storage XML file. Use Application B to read the data from the XML file.

2. Store the data of Application A in the cloud by using web services. Use Application B to retrieve the data by using web services.

3. Expose the data in Application A to Application B by using the AppConnect feature.

4. Store the data of Application A in a local database. Use Application B to read the data from the local database.

Answer: B

Question No: 100 – (Topic 1)

Which Windows Phone theme color is used to single out items of interest in Windows Phone applications?

1. Foreground

2. Accent

3. Contrast

4. Background

Answer: B

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