NEW QUESTION 1
You are developing an application that includes a class named Customer and a generic list of customers. The following code segment declares the list of customers:
List<Customer> customersList = new List<Customer> () ;
You populate the customersList object with several hundred Customer objects. The application must display the data for five Customer objects at a time.
You need to create a method that will return the correct number of Customer objects. Which code segment should you use?

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

Answer: A

Explanation: Note: Something wrong with question as the question is about LINQ, while the answers are about class definitions (and not LINQ method definitions).

NEW QUESTION 2
An application is throwing unhandled NullReferenceException and FormatException errors. The stack trace shows that the exceptions occur in the GetWebResult() method.
The application includes the following code to parse XML data retrieved from a web service. (Line numbers are included for reference only.)

You need to handle the exceptions without interfering with the existing error-handling infrastructure. 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

Answer: AC

Explanation: A: The TryParse method is like the Parse method, except the TryParse method does not throw an exception if the conversion fails. It eliminates the need to use exception handling to test for a FormatException in the event that s is invalid and cannot be successfully parsed.
C: UnhandledException event handler
If the UnhandledException event is handled in the default application domain, it is raised there for any unhandled exception in any thread, no matter what application domain the thread started in. If the thread started in an application domain that has an event handler for UnhandledException, the event is raised in that application domain.

NEW QUESTION 3
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
You have the following C# code. (Line numbers are included for reference only.)

You need the foreach loop to display a running total of the array elements, as shown in the following output.
13610
15
Solution: You insert the following code at line 02:

Does this meet the goal?

• A. Yes
• B. No

Answer: B

NEW QUESTION 4
You are developing a C# application. The application includes the following code segment, (Line numbers are included for reference only.)

The application fails at line 17 with the following error message: "An item with the same key has already been added."
You need to resolve the error.
Which code segment should you insert at line 16?

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

Answer: A

Explanation: The dictionary<TKey,TValue>.ContainsKey method (TKey) determines whether the Dictionary<TKey,TValue> contains the specified key.
Reference: Dictionary<TKey, TValue>.ContainsKey Method (TKey) https://msdn.microsoft.com/en-us/library/kw5aaea4(v=vs.110).aspx

NEW QUESTION 5
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

Explanation: Assembly.GetExecutingAssembly - Gets the assembly that contains the code that is currently executing.
Reference: http://msdn.microsoft.com/enus/ library/system.refilection.assembly.getexecutingassembly(v=vs.110).aspx Incorrect:
Not A: Assembly.GetAssembly - Gets the currently loaded assembly in which the specified class is defined.
http://msdn.microsoft.com/en-us/library/system.refilection.assembly.getassembly.aspx

NEW QUESTION 6
DRAG DROP
You have an application that uses paging. Each page displays five items from a list. You need to display the second page.
Which three code blocks should you use to develop the solution? To answer, move the appropriate code blocks from the list of code blocks to the answer area and arrange them in the correct order.

Answer:

Explanation: References: https://stackoverflow.com/questions/2380413/paging-with-linq-for-objects

NEW QUESTION 7
You have the following class (line numbers are included for reference only):

ServiceProxy is a proxy for a web service. Calls to the Update method can take up to five seconds. The Test class is the only class the uses Class1.
You run the Execute method three times, and you receive the following results:
213
312
231
You need to ensure that each value is appended to the Value property in the order that the Modify methods are invoked.
What should you do?

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

Answer: B

Explanation: Need to lock statement. The lock keyword marks a statement block as a critical section by obtaining the mutual-exclusion lock for a given object, executing a statement, and then releasing the lock. Reference: lock Statement (C# Reference)
https://msdn.microsoft.com/en-us/library/c5kehkcz.aspx

NEW QUESTION 8
You are developing a C# application. The application references and calls a RESTful web service named EmployeeService. The EmployeeService web service includes a method named GetEmployee, which accepts an employee ID as a parameter. The web service returns the following JSON data from the method.
{"Id":1,"Name":"David Jones">
The following code segment invokes the service and stores the result:

You need to convert the returned JSON data to an Employee object for use in the application. Which code segment should you use?

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

Answer: C

NEW QUESTION 9
You need to write a console application that meets the following requirements:
If the application is compiled in Debug mode, the console output must display Entering debug mode. If the application is compiled in Release mode, the console output must display Entering release mode.
Which code should you use?

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

Answer: D

Explanation: #elif lets you create a compound conditional directive. The #elif expression will be evaluated if neither the preceding #if (C# Reference) nor any preceding, optional, #elif directive expressions evaluate to true. If a #elif expression evaluates to true, the compiler evaluates all the code between the #elif and the next conditional directive. For example:
#define VC7
//...
#if debug Console.Writeline("Debug build");
#elif VC7
Console.Writeline("Visual Studio 7");
#endif Incorrect: Not B:
* System.Refilection.Assembly.GetExecutingAssembly Method Gets the assembly that contains the code that is currently executing.
* Assembly.IsDefined Method
Indicates whether or not a specified attribute has been applied to the assembly.
* System.Dignostics.Debugger Class Enables communication with a debugger. Property: IsAttached
Gets a value that indicates whether a debugger is attached to the process.

NEW QUESTION 10
You are developing an application that uses the Microsoft ADO.NET Entity Framework to retrieve order information from a Microsoft SQL Server database. The application includes the following code. (Line numbers are included for reference only.)

The application must meet the following requirements:
Return only orders that have an OrderDate value other than null.
Return only orders that were placed in the year specified in the OrderDate property or in a later year. You need to ensure that the application meets the requirements.
Which code segment should you insert at line 08?

• A. Where order.OrderDate.Value != null && order.OrderDate.Value.Year > = year
• B. Where order.OrderDate.Value = = null && order.OrderDate.Value.Year = = year
• C. Where order.OrderDate.HasValue && order.OrderDate.Value.Year = = year
• D. Where order.OrderDate.Value.Year = = year

Answer: A

Explanation: *For the requirement to use an OrderDate value other than null use: OrderDate.Value != null
*For the requirement to use an OrderDate value for this year or a later year use: OrderDate.Value>= year

NEW QUESTION 11
HOTSPOT
You are developing an application in C#. You need to create an anonymous method. You write the following code segment.

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: Target 1: delegate
Target 2: void
Target 3: delegate References:

NEW QUESTION 12
You are modifying an existing banking application.
The application includes an Account class and a Customer class. The following code segment defines the classes.

You populate a collection named customerCollection with Customer and Account objects by using the following code segment:

You create a largeCustomerAccounts collection to store the Account objects by using the following code segment:
Collection<Account> largeCustomerAccounts = new Collection<Account> ();
All accounts with a Balance value greater than or equal to 1,000,000 must be tracked. You need to populate the largeCustomerAccounts collection with Account objects. Which code segment should you use?

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

Answer: C

NEW QUESTION 13
You are developing an application that will manage customer records. The application includes a method named FindCustomer.
Users must be able to locate customer records by using the customer identifier or customer name. You need to implement the FindCustomer() method to meet the requirement.
Which two sets of method signatures can you use to achieve this goal? (Each correct answer presents a complete solution. Choose two.)

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

Answer: BD

NEW QUESTION 14
A public class named Message has a method named SendMessage. The SendMessage() method is leaking memory.

• A. Add a finally statement and implement the gc.collect() method.
• B. Modify the Message class to use the IDisposable interface.
• C. Remove the try…catch block and allow the errors to propagate.
• D. Replace the try…catch block with a using statement.

Answer: A

Explanation: Reference: https://docs.microsoft.com/enus/ dotnet/api/system.gc.collect?redirectedfrom=MSDN&view=netframework- 4.7.2#System_GC_Collect

NEW QUESTION 15
You are developing an application that includes the following code segment:

You need to implement the Open() method of each interface in a derived class named UseResources and call the Open() method of each interface.
Which two code segments should you use? (Each correct answer presents part of the solution. Choose two.)

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

Answer: AC

Explanation: * An interface contains only the signatures of methods, properties, events or indexers. A class or struct that implements the interface must implement the members of the interface that are specified in the interface definition.
* Example:
interface ISampleInterface
{
void SampleMethod();
}
class ImplementationClass : ISampleInterface
{
// Explicit interface member implementation: void ISampleInterface.SampleMethod()
{
// Method implementation.
}
static void Main()
{
// Declare an interface instance.
ISampleInterface obj = new ImplementationClass();
// Call the member. obj.SampleMethod();
}
}

NEW QUESTION 16
You are creating an application that manages information about your company's products. The application includes a class named Product and a method named Save.
The Save() method must be strongly typed. It must allow only types inherited from the Product class that use a constructor that accepts no parameters.
You need to implement the Save() method. Which code segment should you use?

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

Answer: D

Explanation: The condition new() ensures the empty/default constructor and must be the last condition.
When you define a generic class, you can apply restrictions to the kinds of types that client code can use for type arguments when it instantiates your class. If client code tries to instantiate your class by using a type that is not allowed by a constraint, the result is a compile-time error. These restrictions are called constraints.
Constraints are specified by using the where contextual keyword. http://msdn.microsoft.com/en-us/library/d5x73970.aspx