Microsoft 70-559

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Microsoft UPGRADE: MCAD Skills to MCTS Web Apps Using MS.NET Framework Sample Questions:

1. You work as the developer in an IT company. Recently your company has a big customer. The customer runs a large supermarket chain. You're appointed to provide technical support for the customer. There's an SQL query that takes one minute to execute. You execute the SQL query asynchronously by using the following code:
IAsyncResult ar = cmd.BeginExecuteReader();
When you're executing the SQL query is executing, you have to execute a method named DoWork(). It takes one second for the method to execute. When the SQL query is executing, DoWork() must run as many times as possible.
In the options below, which code segment should you use?

A) while (ar.AsyncWaitHandle == null) { DoWork();}dr = cmd.EndExecuteReader(ar);
B) while (Thread.CurrentThread.ThreadState == ThreadState.Running) { DoWork();}dr = cmd.EndExecuteReader(ar);
C) while (!ar.AsyncWaitHandle.WaitOne()) { DoWork();}dr = cmd.EndExecuteReader(ar);
D) while (!ar.IsCompleted) { DoWork();}dr = cmd.EndExecuteReader(ar);

2. You have just graduated from college, now you are serving the internship as the software developer in an international company. According to the requirements of the company CIO, you are creating a class. The class uses unmanaged resources and maintains references to managed resources on other objects. You must make sure that when the class instance cease to be needed, users of this class can explicitly release resources. what should you do? (choose more than one)

A) You should create a class destructor that calls methods on other objects to release the managed resources.
B) You should define the class such that it inherits from the WeakReference class.
C) You should create a Dispose method that releases unmanaged resources and calls methods on other objects to release the managed resources.
D) You should create a Dispose method that calls System.GC.Collect to force garbage collection.
E) You should define the class such that it implements the IDisposable interface.
F) You should create a class destructor that releases the unmanaged resources.

3. You have just graduated from college, now you are serving the internship as the software developer in an international company. According to the requirements of the company CIO, you are creating a custom-collection class. A method needs to be created in your class. You must make sure that the method you create returns a type. And the type should be compatible with the Foreach statement. Which criterion should the method meet?

A) The method must be the only iterator in the class.
B) The method must explicitly contain a collection.
C) The method must return a type of either IEnumerator or IEnumerable.
D) The method must return a type of IComparable.

4. You have just graduated from college,now you are serving the internship as the software developer in an international company. According to the requirements of the company CIO, you're developing a server. You are developing an application. Users who are not members of the Administrator group are not allowed to run the application. You protect sensitive data within the application by writing the security code below:
Dim blnAdmin As Boolean = False
Dim objRole As WindowsBuiltInRole = _
WindowsBuiltInRole.Administrator
If blnAdmin = False Then
Throw New Exception("User not permitted")
End If
Now if a user is not a member of the Administrator group, the application must throw an exception. You must add a code segment to this security code to ensure this.
In the options below, which code segment should you use?
objGroup.Value.Equals(objRole)Next

A) Dim objUser As GenericPrincipal = _DirectCast(Thread.CurrentPrincipal, GenericPrincipal)blnAdmin = objUser.IsInRole(objRole.ToString)
B) Dim objUser As WindowsIdentity = WindowsIdentity.GetCurrentFor Each objGroup As IdentityReference In objUser.GroupsDim objAccount As NTAccount = _ DirectCast(objGroup.Translate( _ Type.GetType("NTAccount")), NTAccount)blnAdmin =
C) Dim objUSer As WindowsIdentity = _DirectCast(Thread.CurrentPrincipal.Identity, WindowsIdentity)blnAdmin = objUSer.Name.EndsWith("Administrator")
D) Dim objUser As WindowsPrincipal = _DirectCast(Thread.CurrentPrincipal, WindowsPrincipal)blnAdmin = objUser.IsInRole(objRole)

5. You work as the developer in an IT company. Recently your company has a big customer. The customer runs a large supermarket chain. You're appointed to provide technical support for the customer. Now you are creating a class library according to the customer requirement. The class library contains the class hierarchy defined in the following code segment. (Line numbers are included for reference only.)
1 public class Group {
2 public Employee[] Employees;
3 }
4 public class Employee {
5 public string Name;
6 }
7 public class Manager : Employee {
8 public int Level;
9 }
You create an instance of the Group class then populate the fields of the instance. You receive InvalidOperationException when you use the Serialize method of the XmlSerializer class to serialize the instance. Besides this, you receive the following error message: "There was an error generating the XML document."
In order to successfully use the XmlSerializer class to serialize instances of the Group class, you have to modify the code segment. And you must make sure that the XML output contains an element for all public fields in the class hierarchy.
What should you do?

A) Insert the following code between lines 3 and 4 of the code segment: [XmlElement(Type = typeof(Employee))] andInsert the following code between lines 6 and 7 of the code segment: [XmlElement(Type = typeof(Manager))]
B) Insert the following code between lines 1 and 2 of the code segment: [XmlArray(ElementName="Employees")]
C) Insert the following code between lines 1 and 2 of the code segment: [XmlElement(Type = typeof(Employees))]
D) Insert the following code between lines 1 and 2 of the code segment: [XmlArrayItem(Type = typeof(Employee))] [XmlArrayItem(Type = typeof(Manager))]

Solutions: