Which two interfaces should you implement?
You are modifying an existing application that manages employee payroll. The application
includes a class named PayrollProcessor. The PayrollProcessor class connects to a payroll
database and processes batches of paychecks once a week.
You need to ensure that the PayrollProcessor class supports iteration and releases
database connections after the batch processing completes.
Which two interfaces should you implement? (Each correct answer presents part of the
complete solution. Choose two.)
You need to debug the error that is displayed in the warning message
###BeginCaseStudy###
Case Study: 1
Scenario 1
Application Information
You are developing two Windows Store apps by using JavaScript: a Personal Trainer app and
a Client app. The apps will allow personal fitness trainers to interact with their remote clients.
Business Requirements- Personal Trainer Application
The Personal Trainer app must allow trainers to perform the following tasks:
• Create and store video and audio recordings of workout routines.
• View the profile and workout recordings for only one client at any time.
Business Requirements- Client Application
The Client app must allow clients to perform the following tasks:
• Browse a list of the trainer’s workout recordings.
• Record workouts by using the built-in webcam.
• Play, pause, restart, and stop workout recordings.
• If the capability is supported, allow the client’s webcam to pan as the client moves
around the room.
• Upload workout recordings for trainer review.
• Update their individual profiles to indicate workouts completed, calories burned, and
current weight.
The Client app must validate that the client’s subscription is valid.
Technical Requirements- General
The Client app must allow clients to perform the following tasks:
• Browse a list of the trainer’s workout recordings.
• Record workouts by using the built-in webcam.
• Play, pause, restart, and stop workout recordings.
• If the capability is supported, allow the client’s webcam to pan as the client moves
around the room.
• Upload workout recordings for trainer review.
• Update their individual profiles to indicate workouts completed, calories burned, and
current weight.
The Client app must validate that the client’s subscription is valid.
Technical Requirements- Hardware Requirements
The Personal Trainer and Client apps must support the following hardware requirements:
• Windows 8
• Webcam, microphone, and speakers
• Internet connection
While testing the apps, you identify the following issues:
• When you start the app for the first time, the system displays this warning message:
“This app needs permission to use your camera, which you can change in the app’s settings.”
• When you run the loadClientProfile( ) method in the clientData.js file, you receive an
“Access Denied” exception.
• The findCamera( ) method in the video.js file throws an exception on some devices.
• The recordVideo( ) method in the video.js file throws an exception when the device
does not support tilting.
###EndCaseStudy###
You need to debug the error that is displayed in the warning message.
What should you do?
Which code segment should you use?
You are developing an application that will read data from a text file and display the file contents.
You need to read data from the file, display it, and correctly release the file resources.
Which code segment should you use?
Which code segment should you insert at line CD21?
###BeginCaseStudy###
Case Study: 1
Scenario 1
Application Information
You are developing two Windows Store apps by using JavaScript: a Personal Trainer app and
a Client app. The apps will allow personal fitness trainers to interact with their remote clients.
Business Requirements- Personal Trainer Application
The Personal Trainer app must allow trainers to perform the following tasks:
• Create and store video and audio recordings of workout routines.
• View the profile and workout recordings for only one client at any time.
Business Requirements- Client Application
The Client app must allow clients to perform the following tasks:
• Browse a list of the trainer’s workout recordings.
• Record workouts by using the built-in webcam.
• Play, pause, restart, and stop workout recordings.
• If the capability is supported, allow the client’s webcam to pan as the client moves
around the room.
• Upload workout recordings for trainer review.
• Update their individual profiles to indicate workouts completed, calories burned, and
current weight.
The Client app must validate that the client’s subscription is valid.
Technical Requirements- General
The Client app must allow clients to perform the following tasks:
• Browse a list of the trainer’s workout recordings.
• Record workouts by using the built-in webcam.
• Play, pause, restart, and stop workout recordings.
• If the capability is supported, allow the client’s webcam to pan as the client moves
around the room.
• Upload workout recordings for trainer review.
• Update their individual profiles to indicate workouts completed, calories burned, and
current weight.
The Client app must validate that the client’s subscription is valid.
Technical Requirements- Hardware Requirements
The Personal Trainer and Client apps must support the following hardware requirements:
• Windows 8
• Webcam, microphone, and speakers
• Internet connection
While testing the apps, you identify the following issues:
• When you start the app for the first time, the system displays this warning message:
“This app needs permission to use your camera, which you can change in the app’s settings.”
• When you run the loadClientProfile( ) method in the clientData.js file, you receive an
“Access Denied” exception.
• The findCamera( ) method in the video.js file throws an exception on some devices.
• The recordVideo( ) method in the video.js file throws an exception when the device
does not support tilting.
###EndCaseStudy###
You need to ensure that client profiles can be saved in the required file format.
Which code segment should you insert at line CD21?
You need to create a method that can be called by using a varying number of parameters
You need to create a method that can be called by using a varying number of parameters.
What should you use?
complete each statement according to the information presented in the code.
HOTSPOT
You have the following code (line numbers are included for reference only):
To answer, complete each statement according to the information presented in the code.
For each of the following statements, select Yes if the statement is true….
HOTSPOT
You have the following code:
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
>For each of the following statements, select Yes if the statement is true…
HOTSPOT
You are building a data access layer in an application that contains the following code:
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
For each of the following statements, select Yes if the statement is true…
HOTSPOT
You have the following code:
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
How should you write the catch block?
DRAG DROP
You are creating a method that saves information to a database.
You have a static class named LogHelper. LogHelper has a method named Log to log the
exception.
You need to use the LogHelper Log method to log the exception raised by the database
server. The solution must ensure that the exception can be caught by the calling method,
while preserving the original stack trace.
How should you write the catch block? (Develop the solution by selecting and ordering the
required code snippets. You may not need all of the code snippets.)