70-483 試験問題を無料オンラインアクセス

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

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.)

正解：

1 - if (_inventory == null)
2 - lock (_lock)
3 - if (_inventory == null) _inventory = new Inventory ( ) ;
Explanation:
After taking a lock you must check once again the _inventory field to be sure that other threads didn't instantiated it in the meantime.
First, you check if the inventory is null, if so, you lock it to avoid other threads to change it.
Second, you check again for the null, as in the tiny millisecond between check for null and locking could another thread get it.
Finally you create the instance and release the lock.

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

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

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

You are creating a console application by using C#.
You need to access the application assembly.
Which code segment should you use?

• A.Assembly.Load();
• B.Assembly.GetAssembly(this);
• C.Assembly.GetExecutingAssembly();
• D.this.GetType();

You have a method that will evaluate a parameter of type Int32 named Status.
You need to ensure that the method meets the following requirements:
If Status is set to Active, the method must return 1.
If Status is set to Inactive, the method must return 0.
If Status is any other value, the method must return -1.
What should you do? (To answer, drag the appropriate statement to the correct location in the answer area. Each statement 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.)

正解：

Explanation:
Example:
int caseSwitch = 1;
switch (caseSwitch)
{
case 1:
Console.WriteLine("Case 1");
break;
case 2:
Console.WriteLine("Case 2");
break;
default:
Console.WriteLine("Default case");
break;
}
Reference:
https://msdn.microsoft.com/en-us/library/06tc147t.aspx