You are developing an application. The application includes classes named Mammal and Animal and an
interface named IAnimal.
The Mammal class must meet the following requirements:
It must either inherit from the Animal class or implement the IAnimal interface.
It must be inheritable by other classes in the application.
You need to ensure that the Mammal class meets the requirements.
Which two code segments can you use to achieve this goal? (Each correct answer presents a complete
solution. Choose two.)

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?

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?

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?

DRAG DROP
You are implementing a method that creates an instance of a class named User. The User class contains a
public event named Renamed. The following code segment defines the Renamed event:
Public event EventHandler<RenameEventArgs> Renamed;
You need to create an event handler for the Renamed event by using a lambda expression.
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.)
Select and Place:

You are creating a console application by using C#.
You need to access the assembly found in the file named car.dll.
Which code segment should you use?

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

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

You are adding a public method named UpdateGrade to a public class named ReportCard.
The code region that updates the grade 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 UpdateGrade() method.
What should you do?

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

You have the following requirements:
Initialize the _inventory field to an Inventory instance.
Initialize the _inventory field only once.
Ensure that the application code acquires a lock only when the _inventory 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 by using C#. The application will process several objects per second.
You need to create a performance counter to analyze the object processing.
Which three actions should you perform in sequence? (To answer, move the appropriate actions from the list of
actions to the answer area and arrange them in the correct order.)
Select and Place: