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Q71. - (Topic 1)
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
Q72. - (Topic 2)
You are developing an application that includes the following code segment. (Line numbers are included for reference only.)
You need to ensure that the DoWork(Widget widget) method runs.
With which code segment should you replace line 24?
A. DoWork((Widget)o);
B. DoWork(new Widget(o));
C. DoWork(o is Widget);
D. DoWork((ItemBase)o);
Answer: A
Q73. - (Topic 2)
You are implementing a new method named ProcessData. The ProcessData() method calls a third-party component that performs a long-running operation to retrieve stock information from a web service.
The third-party component uses the IAsyncResult pattern to signal completion of the long-running operation so that the UI can be updated with the new values.
You need to ensure that the calling code handles the long-running operation as a System.Threading.Tasks.Task object to avoid blocking the UI thread.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)
A. Create a TaskCompletionSource<T> object.
B. Call the component by using the TaskFactory.FromAsync() method.
C. Apply the following attribute to the ProcessData() method signature: [Methodlmpl(MethodlmplOptions.Synchronized)]
D. Apply the async modifier to the ProcessData() method signature.
Answer: A,B
Explanation: A: In many scenarios, it is useful to enable a Task<TResult> to represent an external asynchronous operation. TaskCompletionSource<TResult> is provided for this purpose. It enables the creation of a task that can be handed out to consumers, and those consumers can use the members of the task as they would any other. However, unlike most tasks, the state of a task created by a TaskCompletionSource is controlled explicitly by the methods on TaskCompletionSource. This enables the completion of the external asynchronous operation to be propagated to the underlying Task. The separation also ensures that consumers are not able to transition the state without access to the corresponding TaskCompletionSource.
B: TaskFactory.FromAsync Method
Creates a Task that represents a pair of begin and end methods that conform to the
Asynchronous Programming Model pattern. Overloaded.
Example:
TaskFactory.FromAsync Method (IAsyncResult, Action<IAsyncResult>)
Creates a Task that executes an end method action when a specified IAsyncResult completes.
Note:
* System.Threading.Tasks.Task Represents an asynchronous operation.
Q74. - (Topic 2)
You are modifying an application that processes loans. The following code defines the Loan class. (Line numbers are included for reference only.)
Loans are restricted to a maximum term of 10 years. The application must send a notification message if a loan request exceeds 10 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
Answer: B,D
Q75. - (Topic 1)
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 year parameter.
You need to ensure that the application meets the requirements. Which code segment should you insert at line 08?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: B
Q76. - (Topic 2)
You are developing an application that includes a class named Employee and a generic list
of employees. The following code segment declares the list of employees:
List<Employee> employeesList = new List<Employee>();
You populate the employeesList object with several hundred Employee objects.
The application must display the data for five Employee objects at a time.
You need to create a method that will return the correct number of Employee objects.
Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: B
Q77. HOTSPOT - (Topic 1)
You have the following code:
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
Answer:
Q78. - (Topic 1)
You are developing an application. The application converts a Location object to a string by using a method named WriteObject.
The WriteObject() method accepts two parameters, a Location object and an XmlObjectSerializer object.
The application includes the following code. (Line numbers are included for reference only.)
You need to serialize the Location object as XML.
Which code segment should you insert at line 20?
A. new XmlSerializer(typeof(Location))
B. new NetDataContractSerializer()
C. new DataContractJsonSerializer(typeof (Location))
D. new DataContractSerializer(typeof(Location))
Answer: D
Explanation:
The code is using [DataContract] attribute here so need to used DataContractSerializer class.
Q79. - (Topic 1)
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:
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
Q80. - (Topic 2)
You are developing an application that contains a class named TheaterCustomer and a method named ProcessTheaterCustomer. The ProcessTheaterCustomer() method accepts a TheaterCustomer object as the input parameter.
You have the following requirements:
. Store the TheaterCustomer objects in a collection. . Ensure that the ProcessTheaterCustomer() method processes the TheaterCustomer objects in the order in which they are placed into the collection.
You need to meet the requirements.
What should you do?
A. Create a System.Collections.Stack collection. Use the Push() method to add TheaterCustomer objects to the collection, Use the Peek() method to pass the objects to the ProcessTheaterCustomer() method.
B. Create a System.Collections.Queue collection. Use the Enqueue() method to add TheaterCustomer objects to the collection. Use the Dequeue() method to pass the objects to the ProcessTheaterCustomer() method.
C. Create a System.Collections.SortedList collection. Use the Add() method to add TheaterCustomer objects to the collection. Use the Remove() method to pass the objects to the ProcessTheaterCustomer() method.
D. Create a System.Collections.ArrayList collection. Use the Insert() method to add TheaterCustomer objects to the collection. Use the Remove() method to pass the objects to the ProcessTheaterCustomer() method.
Answer: B
