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.)

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 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?

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.)