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. The application will transmit sensitive information on a network. You create two objects, one is an X509Certificate object named certificate, the other is a TcpClient object named client. Now you have to use the Transport Layer Security 1.0 protocol to create an SslStream to communicate. In the options below, which code segment should you use?

• A. Dim objSSL As New SslStream(client.GetStream)objSSL.AuthenticateAsServer(certificate, False, _
  SslProtocols.Ssl2, True)
• B. Dim objSSL As New SslStream(client.GetStream)objSSL.AuthenticateAsServer(certificate, False, _ SslProtocols.Ssl3, True)
• C. Dim objSSL As New SslStream(client.GetStream)objSSL.AuthenticateAsServer(certificate, False, _ SslProtocols.None, True)
• D. Dim objSSL As New SslStream(client.GetStream)objSSL.AuthenticateAsServer(certificate, False, _ SslProtocols.Tls, True)

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. The application will use custom authentication and role-based security. You have to make the runtime assign an unauthenticated principal object to each running thread, so you have to write a code segment. In the options below, which code segment should you use?

• A. Dim objDomain As AppDomain = AppDomain.CurrentDomainobjDomain.SetPrincipalPolicy( _ PrincipalPolicy.WindowsPrincipal)
• B. Dim objDomain As AppDomain = AppDomain.CurrentDomainobjDomain.SetThreadPrincipal(New WindowsPrincipal(Nothing))
• C. Dim objDomain As AppDomain = AppDomain.CurrentDomainobjDomain.SetPrincipalPolicy( _ PrincipalPolicy.UnauthenticatedPrincipal)
• D. Dim objDomain As AppDomain = AppDomain.CurrentDomainobjDomain.SetAppDomainPolicy( _ PolicyLevel.CreateAppDomainLevel())

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 are writing code for user authentication and authorization. The username, password, and roles are stored in your application data store.
You have to build a user security context that will be used for authorization checks such as IsInRole. The security context will be used for authorization checks such as IsInRole. You authorize the user by writing the code segment below:
if (!TestPassword(userName, password))
throw new Exception("could not authenticate user");
String[] userRolesArray = LookupUserRoles(userName);
In order to establish the user security, you have to complete the code segment. In the options below, which code segment should you use?

• A. IntPtr token = IntPtr.Zero;token = LogonUserUsingInterop(userName, encryptedPassword);WindowsImpersonationContext ctx = WindowsIdentity.Impersonate(token);
• B. WindowsIdentity ident = new WindowsIdentity(userName);WindowsPrincipal currentUser = new WindowsPrincipal(ident);Thread.CurrentPrincipal = currentUser;
• C. GenericIdentity ident = new GenericIdentity(userName);GenericPrincipal currentUser = new GenericPrincipal(ident, userRolesArray);Thread.CurrentPrincipal = currentUser;
• D. NTAccount userNTName = new NTAccount(userName);GenericIdentity ident = new GenericIdentity(userNTName.Value);GenericPrincipal currentUser= new GenericPrincipal(ident, userRolesArray);Thread.CurrentPrincipal = currentUser;

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 call the method by using the BeginGetAysncData and EndGetAsyncData delegates.
• 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 set the Async attribute to True inside the page directive of the Web Form that calls the method.