Free Oracle 1Z0-899 Exam Dumps Questions & Answers

A developer chooses to avoid using singieThreadModel but wants to ensure that data If; updated in a thread safe manner.
Which two can support this design goal? (Choose two)

• A.Store the data in the Httpsession object.
• B.Store the data in an instance variable.
• C.Store the data in the ServletRequest object.
• D.Store the data in the sarvletContext object.
• E.Store the data in a local variable.

You are implementing a model component. You realize that an IOException might arise if you lose connection to the database. How should you address this?

• A.Implement multipathing to provide redundant connectivity to the database, thereby avoiding that risk of connection failure.
• B.Provide an error handler page, and use the page directive in the invoking ISP to redirect to that page if the error arises.
• C.Use the JSTL <c:catch> tag to take control if the exception arises.
• D.Surround the problem area with a try/catch block and implement appropriate recovery or fallback behavior.

A web application wants to register a new servlet at runtime using one of the servletContext.addServlet methods.
In the implementation of which method is it legal to perform this operation?

• A.ServletrequestListener.contextInitialize
• B.AsyncListner.oncomplete
• C.Servlet.init
• D.ServletContextListener.contextInitialize

ServletRegistration.Dynamic can be used to configure (Choose two)

• A.Filter mappings
• B.set asyncSupported to true
• C.add Listeners
• D.add init params

A servlet wishes to indicate that it is unable to initialize at the present time, but that the initialization might succeed at some future time. Which is true?

• A.The servlet should throw an UnavailableException
• B.The servlet should throw a servletException
• C.This cannot be expressed. A servlet either initializes correctly or fails.
• D.The servlet should delay until it is ready to complete initialization successfully.
• E.This expression is not necessary. If a servlet fails to initialize, the container will try again later each time a request is received that attempts to invoke that servlet.