NEW QUESTION 1
HOTSPOT
You are reviewing the following code:

For each of the following statements, select Yes if the statement is true. Otherwise, select No.

Answer:

Explanation: 1) Yes, because Group is enum with FlagAttribute
2) Yes, because only Administrator = 8 and 8 == 8 is true
3) Yes, becaues only Supervisor = 2 and 2 < 8 is true

NEW QUESTION 2
You have the following code (line numbers are included for reference only):

You need to ensure that if an exception occurs, the exception will be logged. Which code should you insert at line 28?

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Answer: C

Explanation: * XmlWriterTraceListener
Directs tracing or debugging output as XML-encoded data to a TextWriter or to a Stream, such as a FileStream.
* TraceListener.TraceEvent Method (TraceEventCache, String, TraceEventType, Int32) Writes trace and event information to the listener specific output.
Syntax: [ComVisibleAttribute(false)] public virtual void TraceEvent( TraceEventCache eventCache, string source, TraceEventType eventType, int id
)

NEW QUESTION 3
You are developing an application that includes a class named Order. The application will store a collection of Order objects.
The collection must meet the following requirements: Use strongly typed members.
Process Order objects in first-in-first-out order. Store values for each Order object.
Use zero-based indices.
You need to use a collection type that meets the requirements. Which collection type should you use?

• A. Queue<T>
• B. SortedList
• C. LinkedList<T>
• D. HashTable
• E. Array<T>

Answer: A

Explanation: Queues are useful for storing messages in the order they were received for sequential processing. Objects stored in a Queue<T> are inserted at one end and removed from the other.
Reference: http://msdn.microsoft.com/en-us/library/7977ey2c.aspx

NEW QUESTION 4
DRAG DROP
You are creating a class named Data that includes a dictionary object named _data.
You need to allow the garbage collection process to collect the references of the _data object. 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.)

Answer:

Explanation: * WeakReference influences the garbage collector. Most objects that are referenced must be kept in memory until they are unreachable. But with WeakReference, objects that are referenced can be collected.
* Example: C# program that uses WeakReference using System;
using System.Text; class Program
{
/// <summary>
/// Points to data that can be garbage collected any time.
/// </summary>
static WeakReference _weak; static void Main()
{
// Assign the WeakReference.
_weak = new WeakReference(new StringBuilder("perls")); Reference: http://www.dotnetperls.com/weakreference

NEW QUESTION 5
You are testing an application. The application includes methods named CalculateInterest and LogLine. The CalculateInterest() method calculates loan interest. The LogLine() method sends diagnostic messages to a console window.
The following code implements the methods. (Line numbers are included for reference only.)

You have the following requirements:
The CalculateInterest() method must run for all build configurations. The LogLine() method must run only for debug builds.
You need to ensure that the methods run correctly.
What are two possible ways to achieve this goal? (Each correct answer presents a complete solution. Choose two.)

• A. Insert the following code segment at line 01:#region DEBUGInsert the following code segment at line 10:#endregion
• B. Insert the following code segment at line 01: [Conditional("DEBUG")]
• C. Insert the following code segment at line 05:#region DEBUGInsert the following code segment at line 07:#endregion
• D. Insert the following code segment at line 10: [Conditional("DEBUG")]
• E. Insert the following code segment at line 01:#if DEBUGInsert the following code segment at line 10:#endif
• F. Insert the following code segment at line 10: [Conditional("RELEASE")]
• G. Insert the following code segment at line 05:#if DEBUGInsert the following code segment at line 07:#endif

Answer: DG

Explanation: D: Also, it's worth pointing out that you can use [Conditional("DEBUG")] attribute on methods that return void to have them only executed if a certain symbol is defined. The compiler would remove all calls to those methods if the symbol is not defined:
[Conditional("DEBUG")] void PrintLog() {
Console.WriteLine("Debug info");
}
void Test() { PrintLog();
}
G: When the C# compiler encounters an #if directive, followed eventually by an #endif directive, it will compile the code between the directives only if the specified symbol is defined. Unlike C and C++, you cannot assign a numeric value to a symbol; the #if statement in C# is Boolean and only tests whether the symbol has been defined or not. For example,
#define DEBUG
#if DEBUG
Console.WriteLine("Debug version");
#endif
Reference: http://stackoverflow.com/questions/2104099/c-sharp-if-then-directives-for-debug-vsrelease

NEW QUESTION 6
HOTSPOT
You have the following code:

For each of the following statements, select Yes if the statement is true. Otherwise, select No.

Answer:

Explanation: No
Yes
No

NEW QUESTION 7
You are developing an application by using C#.
The application includes an object that performs a long running process.
You need to ensure that the garbage collector does not release the object's resources until the process completes.
Which garbage collector method should you use?

• A. WaitForFullGCComplete()
• B. SuppressFinalize()
• C. collect()
• D. RemoveMemoryPressure()

Answer: B

Explanation: You can use the SuppressFinalize method in a resource class to prevent a redundant garbage collection from being called.
Reference: GC.SuppressFinalize Method (Object)
https://msdn.microsoft.com/en-us/library/system.gc.suppressfinalize(v=vs.110).aspx

NEW QUESTION 8
HOTSPOT
You are developing an application that includes a Windows Communication Foundation (WCF) service. The service includes a custom TraceSource object named ts and a method named DoWork. The application must meet the following requirements:
Collect trace information when the DoWork() method executes.
Group all traces for a single execution of the DoWork() method as an activity that can be viewed in the WCF Service Trace Viewer Tool.
You need to ensure that the application meets the requirements.
How should you complete the relevant code? (To answer, select the correct code segment from each drop-down list in the answer area.)

Answer:

Explanation: Activities are logical unit of processing. You can create one activity for each major processing unit in which you want traces to be grouped together. For example, you can create one activity for each request to the service. To do so, perform the following steps.
Save the activity ID in scope.
Create a new activity ID.
Transfer from the activity in scope to the new one, set the new activity in scope and emit a start trace for that activity.
The following code demonstrates how to do this. Guid oldID = Trace.CorrelationManager.ActivityId; Guid traceID = Guid.NewGuid(); ts.TraceTransfer(0, "transfer", traceID);
Trace.CorrelationManager.ActivityId = traceID; // Trace is static ts.TraceEvent(TraceEventType.Start, 0, "Add request"); Reference: Emitting User-Code Traces https://msdn.microsoft.com/en-us/library/aa738759(v=vs.110).aspx

NEW QUESTION 9
HOTSPOT
You are developing an application in C#.
You need to implement a custom exception for the application. You have the following code.

How should you complete the code? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point.

Answer:

Explanation:

NEW QUESTION 10
You have a List object that is generated by executing the following code:

You have a method that contains the following code (line numbers are included for reference only):

You need to alter the method to use a lambda statement. How should you rewrite lines 03 through 06 of the method?

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Answer: C

Explanation: This returns a bool and will work fine. Incorrect:
Not A: This returns a string.
Not B, not D: These return IEnumerable.

NEW QUESTION 11
You are developing an application that will be deployed to multiple computers. You set the assembly name.
You need to create a unique identity for the application assembly.
Which two assembly identity attributes should you include in the source code? (Each correct answer presents part of the solution. Choose two.)

• A. AssemblyTitleAttribute
• B. AssemblyCultureAttribute
• C. AssemblyVersionAttribute
• D. AssemblyKeyNameAttribute
• E. AssemblyFileVersion

Answer: BC

Explanation: The AssemblyName object contains information about an assembly, which you can use to bind to that assembly. An assembly's identity consists of the following:
Simple name Version number
Cryptographic key pair Supported culture
B: AssemblyCultureAttribute
Specifies which culture the assembly supports.
The attribute is used by compilers to distinguish between a main assembly and a satellite assembly. A main assembly contains code and the neutral culture's resources. A satellite assembly contains
only resources for a particular culture, as in [assembly:AssemblyCultureAttribute("de")] C: AssemblyVersionAttribute
Specifies the version of the assembly being attributed.
The assembly version number is part of an assembly's identity and plays a key part in binding to the assembly and in version policy.

NEW QUESTION 12
You are developing an application by using C#.
The application includes an object that performs a long running process.
You need to ensure that the garbage collector does not release the object's resources until the process completes.
Which garbage collector method should you use?

• A. RemoveMemoryPressure()
• B. ReRegisterForFinalize()
• C. WaitForFullGCComplete()
• D. KeepAlive()

Answer: D

Explanation: The purpose of the KeepAlive method is to ensure the existence of a reference to an object that is at risk of being prematurely reclaimed by the garbage collector.
Reference: GC.KeepAlive Method (Object)
https://msdn.microsoft.com/en-us/library/system.gc.keepalive(v=vs.110).aspx

NEW QUESTION 13
DRAG DROP
You have the following code:

You need to display all of the vehicles that start with the letter “A”.
How should you complete the code? To answer, drag the appropriate code elements to the correct targets. Each code 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.
NOTE: Each correct selection is worth one point.

Answer:

Explanation:

NEW QUESTION 14
You are developing an application that will parse a large amount of text.
You need to parse the text into separate lines and minimize memory use while processing data. Which object type should you use?

• A. DataContractSerializer
• B. StringBuilder
• C. StringReader
• D. JsonSerializer

Answer: C

Explanation: There are many ways to separate a string into lines. With StringReader, we read lines from a string individually in the order they appear. This type enables us to access string data through a streamoriented interface.
Reference: http://www.dotnetperls.com/stringreader

NEW QUESTION 15
You plan to store passwords in a Windows Azure SQL Database database.
You need to ensure that the passwords are stored in the database by using a hash algorithm, Which cryptographic algorithm should you use?

• A. ECDSA
• B. RSA-768
• C. AES-256
• D. SHA-256

Answer: D

Explanation: Secure Hash Algorithm is a cryptographic hash function. Incorrect:
Not B: EDCA is an encryption algorithm. Not B: RSA is an encryption algorithm. Not C: AES is an encryption algorithm.
Reference: https://en.wikipedia.org/wiki/SHA-1

NEW QUESTION 16
You are developing an application that will transmit large amounts of data between a client computer and a server. You need to ensure the validity of the data by using a cryptographic hashing algorithm. Which algorithm should you use?

• A. DES
• B. HMACSHA512
• C. RNGCryptoServiceProvider
• D. ECDsa

Answer: B

Explanation: The HMACSHA512 class computes a Hash-based Message Authentication Code (HMAC) using the SHA512 hash function.
Reference: https://msdn.microsoft.com/enus/ library/system.security.cryptography.hmacsha512(v=vs.110).aspx