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| Section | Objectives |
|---|---|
| Topic 1: Data Access and Storage | - File system access and permissions - Local storage and roaming data - Serialization and data persistence techniques |
| Topic 2: User Interface Design with XAML | - Data binding and MVVM pattern implementation - Layout controls and adaptive UI design - Control templates and styling |
| Topic 3: Networking and Services | - Background transfers and connectivity scenarios - Consuming RESTful services - Handling HTTP requests and responses |
| Topic 4: Application Lifecycle Management | - State management and persistence during lifecycle events - App activation, suspension, and termination handling |
| Topic 5: Debugging, Performance, and Troubleshooting | - Performance optimization strategies - Debugging tools and techniques - Exception handling and diagnostics |
| Topic 6: App Deployment and Windows Store | - Windows Store certification requirements - Packaging and deployment process |
DRAG DROP
You are developing a Windows Store social media app. The app communicates with the server by using a secure web service.
You need to ensure that users can securely store and retrieve web service credentials. You have the following code:
Which code snippets should you insert in target 1 and target 2 to complete the code? (To answer, drag the appropriate code snippets to the correct targets in the answer area. Each code snippet 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.)
Correct Answer:

You are developing a Windows Store app that will provide users with the ability to save annotations to text files.
You have the following code segment: (Line numbers are included for reference only.)
You need to add the contents of data to the beginning of file. Which code segment should you insert at line 03?
Correct Answer: D 🗳️
HOTSPOT
You are developing a Windows Store app that allows users to copy music from their local computers to removable storage.
The app displays songs grouped by the month the song was downloaded and allows individual songs to be copied to the removable storage device. The user interface for selecting and copying songs uses data binding.
You need to load and return songs in a format appropriate for data binding.
How should you complete the code segment? (To answer, select the appropriate line of code from each drop-down list in the answer area.)
Correct Answer:

DRAG DROP
You are developing a Windows Store app.
The app will provide users with the ability to play music remotely on another user's device
and then the other users will guess the name of the song.
You need to access the music storage and to retrieve files and folders.
You have the following code:
Which elements should you include in Target 1, Target 2, Target 3 and Target 4 to complete the code? (To answer, drag the appropriate elements to the correct targets in the answer area. Each element 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.)
Correct Answer:

DRAG DROP
You are developing an augmented reality app.
You need to retrieve the direction to which the device points.
You have the following code:
Which code snippets should you include in Target 1, Target 2 and Target 3 to complete the code? (To answer, drag the appropriate code snippets to the correct targets in the answer area. Each code snippet 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.)
Correct Answer:

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