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 which contains a method named GetCurrentRate. The class performs complex financial calculations. The GetCurrentRate method retrieves the current interest rate and a variable named currRate that stores the current interest rate. You have to write a code segment. When an instance of the class is deserialized, the code segment updates the currRate variable with the current interest rate. In the options below, which code segment should you use?

• A. [OnDeserializing]internal void UpdateValue(SerializationInfo info) { info.AddValue("currentRate", GetCurrentRate());}
• B. [OnSerializing]internal void UpdateValue (StreamingContext context) { currRate = GetCurrentRate();}
• C. [OnDeserialized]internal void UpdateValue(StreamingContext context) { currRate = GetCurrentRate();}
• D. [OnSerializing]internal void UpdateValue(SerializationInfo info) { info.AddValue("currentRate", GetCurrentRate());}

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 method to call a COM component. You have to explicitly request the runtime to perform a full stack walk by using declarative security. You must make sure that before the callers execute your method, all callers have the required level of trust for COM interop. So on the method, which attribute should you place?

• A. <SecurityPermission( _ SecurityAction.LinkDemand, _ Flags:=SecurityPermissionFlag.UnmanagedCode) _>
• B. <SecurityPermission( _ SecurityAction.Demand, _ Flags:=SecurityPermissionFlag.UnmanagedCode) _>
• C. <SecurityPermission( _ SecurityAction.Deny, _ Flags:=SecurityPermissionFlag.UnmanagedCode) _>
• D. <SecurityPermission( _ SecurityAction.Assert, _ Flags:=SecurityPermissionFlag.UnmanagedCode) _>

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 set the Async attribute to True inside the page directive of the Web Form that calls the method.
• B. You have to call the method within the PreInit and PreRenderComplete page events.
• 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 customer. The customer runs a large supermarket chain. You're appointed to provide technical support for the customer. Now according to the requirement of the customer, you create an application for its business partners to submit purchase orders. Its partners send XML documents to your customer. The application you create deserializes these XML documents into instances of an object named PurchaseOrder. You must make sure that if the deserialization process encounters any XML content that fails to map to public members of the PurchaseOrder object, the application collects details. So you have to modify the application. What should you do?

• A. You should apply an XmlInclude attribute to the PurchaseOrder class definition.
• 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 define and implement an event handler for the XmlSerializer.UnknownNode event.