DRAG DROP
You develop an application that displays information from log files when errors occur. The application will
prompt the user to create an error report that sends details about the error and the session to the administrator.
When a user opens a log file by using the application, the application throws an exception and closes.
The application must preserve the original stack trace information when an exception occurs during this
process.
You need to implement the method that reads the log files.
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.)
Select and Place:

DRAG DROP
You are developing an application that includes a class named Kiosk. The Kiosk class includes a static property
named Catalog. The Kiosk class is defined by the following code segment. (Line numbers are included for
reference only.)

You have the following requirements:
Initialize the _catalog field to a Catalog instance.
Initialize the _catalog field only once.
Ensure that the application code acquires a lock only when the _catalog object must be instantiated.
You need to meet the requirements.
Which three code segments should you insert in sequence at line 09? (To answer, move the appropriate code
segments from the list of code segments to the answer area and arrange them in the correct order.)
Select and Place:

DRAG DROP
You are developing an application that will include a method named GetData. The GetData() method will
retrieve several lines of data from a web service by using a System.IO.StreamReader object.
You have the following requirements:
The GetData() method must return a string value that contains the first line of the response from the web
service.
The application must remain responsive while the GetData() method runs.
You need to implement the GetData() method.
How should you complete the relevant code? (To answer, drag the appropriate objects to the correct locations
in the answer area. Each object 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.)
Select and Place:

You are adding a public method named UpdateScore to a public class named ScoreCard.
The code region that updates the score field must meet the following requirements:
It must be accessed by only one thread at a time.
It must not be vulnerable to a deadlock situation.
You need to implement the UpdateScore() method.
What should you do?

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

You need to add a user to the UserTracker instance.
What should you do?

You are developing an application that uses structured exception handling. The application includes a class
named ExceptionLogger.
The ExceptionLogger class implements a method named LogException by using the following code segment:
public static void LogException(Exception ex)
You have the following requirements:Log all exceptions by using the LogException() method of the ExceptionLogger class.
Rethrow the original exception, including the entire exception stack.
You need to meet the requirements.
Which code segment should you use?

You are modifying an application that processes leases. The following code defines the Lease class. (Line
numbers are included for reference only.)

Leases are restricted to a maximum term of 5 years. The application must send a notification message if a
lease request exceeds 5 years.
You need to implement the notification mechanism.
Which two actions should you perform? (Each correct answer presents part of the solution.
Choose two.)

You use the Task.Run() method to launch a long-running data processing operation. The data processing
operation often fails in times of heavy network congestion.
If the data processing operation fails, a second operation must clean up any results of the first operation.
You need to ensure that the second operation is invoked only if the data processing operation throws an
unhandled exception.
What should you do?

HOTSPOT
You are implementing a library method that accepts a character parameter and returns a string.
If the lookup succeeds, the method must return the corresponding string value. If the lookup fails, the method
must return the value “invalid choice.”
You need to implement the lookup algorithm.
How should you complete the relevant code? (To answer, select the correct keyword in each drop-down list in
the answer area.)
Hot Area:

You are creating a console application by using C#.
You need to access the application assembly.
Which code segment should you use?