QUESTION 21
Hotspot Question
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.)
Answer:
QUESTION 22
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?
A. Create a TaskCompletionSource<T> object and call the TrySetException() method of the object.
B. Create a task by calling the Task.ContinueWith() method.
C. Examine the Task.Status property immediately after the call to the Task.Run() method.
D. Create a task inside the existing Task.Run() method by using the AttachedToParent option.
Answer: B
QUESTION 23
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.)
A. Option A
B. Option B
C. Option C
D. Option D
E. Option E
F. Option F
Answer: AB
QUESTION 24
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?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: A
QUESTION 25
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?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: D
QUESTION 26
You are creating a console application by using C#.
You need to access the application assembly. Which code segment should you use?
A. Assembly.GetAssembly(this);
B. This.GetType();
C. Assembly.Load ();
D. Assembly.GetExecutingAssembly ();
Answer: D
QUESTION 27
An application includes a class named Person. The Person class includes a method named GetData. You need to ensure that the GetData() method can be used only by the Person class and not by any class derived from the Person class. Which access modifier should you use for the GetData() method?
A. Public
B. Protected internal
C. Internal
D. Private
E. Protected
Answer: D
QUESTION 28
You are developing an assembly that will be used by multiple applications. You need to install the assembly in the Global Assembly Cache (GAC). Which two actions can you perform to achieve this goal? (Each correct answer presents a complete solution. Choose two.)
A. Use the Assembly Registration tool (regasm.exe) to register the assembly and to copy the assembly
to the GAC.
B. Use the Strong Name tool (sn.exe) to copy the assembly into the GAC.
C. Use Microsoft Register Server (regsvr32.exe) to add the assembly to the GAC.
D. Use the Global Assembly Cache tool (gacutil.exe) to add the assembly to the GAC.
E. Use Windows Installer 2.0 to add the assembly to the GAC.
Answer: DE
QUESTION 29
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?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: B
QUESTION 30
Drag and Drop Question
You are developing an application that implements a set of custom exception types. You declare the custom exception types by using the following code segments:
The application includes a function named DoWork that throws .NET Framework exceptions and custom exceptions. The application contains only the following logging methods:
The application must meet the following requirements:
* When AdventureWorksValidationException exceptions are caught, log the information by using the static void Log (AdventureWorksValidationException ex) method.
* When AdventureWorksDbException or other AdventureWorksException exceptions are caught, log the information by using the static void I oq( AdventureWorksException ex) method.
You need to meet the requirements. How should you complete the relevant 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.)
Answer:
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