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 according to the customer requirement, you create a Web Form which calls a method as part of its processing. It takes a long time for the method to process. Besides this, you notice that the other Web Forms in the ASP.NET Web site are now processing slowly. You have to execute the long running method in parallel to other requests to reduce the page response times. So what should you do?

• A. You have to call the method within the PreInit and PreRenderComplete page events.
• B. You have to set the Async attribute to True inside the page directive of the Web Form that calls the method.
• C. You have to set the CompilationMode attribute to Always inside the page directive of the Web Form that calls the method.
• D. You have to call the method by using the BeginGetAysncData and EndGetAsyncData delegates.

You work as the developer in an IT company. Recently your company has a big client. The client runs a large supermarket chain. According to the business requirement, the client needs a class which uses unmanaged resources. This class maintains references to managed resources on other objects. You must make sure that when the class instance is not needed, users of this class can explicitly release resources. What should you do? (choose more than one)

• A. You should make the class inherit from the WeakReference class by defining it.
• B. You should create a class destructor. The class destructor releases the managed resources by calling methods on other objects.
• C. You should create a Dispose method. The method forces garbage collection by calling System.GC.Collect.
• D. You should create a class destructor. The class destructor releases the unmanaged resources.
• E. You should make the class implement the IDisposable interface by defining it.
• F. Create a Dispose method that releases unmanaged resources and calls methods on other objects to release the managed resources.

You work as the developer in an IT company. Recently your company has a big client. The client runs a large supermarket chain. According to the business requirement, the client needs a method to clear a Queue named q. Your company asks you to serve this client. You have to create the method for the client. In the options below, which code segment should you use?

• A. foreach (object e in q) { q.Dequeue();}
• B. q.Dequeue();
• C. foreach (object e in q) { Enqueue(null);}
• D. q.Clear();

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 user control which will be used on 10 Web Forms for an ASP.NET Web site. Users can register and log on to a personalized experience by using the ASP.NET Web site. The custom user control uses two TextBox controls and two Button controls. You must make sure that only when users are not logged on to the Web site, the controls are visible. Besides this, you must reduce the amount of effort in developing and maintaining the Web site. So what should you do? (choose more than one)

• A. You should add the OnClick event handler for the Login button to the code used in the custom user control.
• B. You should add the OnClick event handler for the Login button to the code used in the Web Form where the control is added.
• C. In the Page_Load method of the custom user control, add a code segment to set the visibility of the TextBox and Button controls.
• D. In the Page_Load method of the Web Form, add a code segment to set the visibility of the TextBox and Button controls where the control is added.

You have just graduated from college, now you are serving the internship as the software developer in an international company. The clients of the company send Xml documents to your company. Now you create an application for the clients to submit purchase orders.
The application deserializes these XML documents into instances of an object named PurchaseOrder. Your company wants that if the deserialization process encounters any XML content that fails to map to public members of the PurchaseOrder object, the application can collect details. So you have to modify the application to achieve tjos. So what should you do?

• A. You should define and implement an event handler for the XmlSerializer.UnknownNode event.
• B. You should define a class that inherits from XmlSerializer and overrides the XmlSerialize.FromMappings method.
• C. You should apply an XmlIgnore attribute to the PurchaseOrder class definition.
• D. You should apply an XmlInclude attribute to the PurchaseOrder class definition.