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Oracle 1z0-807 Sample Questions
Question # 1Which two statements are true about thetimer serviceof a business component container?
A. Timed notifications for all types of session beans can be scheduled by using this
service.
B. When the server is shut down,the timer is persisted automatically and becomes active
again when the server is restarted.
C. Each instance of messagedriven beans has unique timers.
D. When stateful session bean instance is removed, the container detaches the timers
associated with the instance and allocates them to the new instance.
E. When a transaction is rolled back, the timer creation within the transaction is also
rolled back.
Question # 2
Whichare theobjectivesof theStrategy pattern?(Choose Two)
A. To define an object that encapsulates how a set of objects interacts
B. To define the skeleton of an algorithm, deferring some steps to subclasses
C. To decouple an abstraction horn its implementation so that the two can vary
independently
D. To define a family of algorithms, encapsulate each one, and make them interchangeable
E. To allow subclasses to redefine certain steps of an algorithm without changing the
algorithm's structure
Question # 3
A company must honor a service-level agreement (SLA) for its application, which states all database requests must execute within three seconds.Users complain that some requests take longer than five seconds to complete. You have been contracted to fix the problem.Which course of action do you recommend?
A. Modify the program to implement multi threading and an event-driven design.
B. Add servers to distribute the load
B. Add servers to distribute the load.
C. Upgrade the application server and the operating system.
D. Define a plan for isolating the bottleneck, and define indicators that will measure
performance under a test load.
Question # 4
Which two measures are most effective in protecting websites from cross site scripting (XSS)attacks?
A. Escape “<” and “>” parameters that displayed or evaluated by the JavaScript interpreter.
B. URL-encode “<” and “>”parameters so they will never be evaluated by the JavaScript
Interpreter.
C. Ensure that thesession cookie is sent only onHTTPSconnections.
D. Treat all user-supplied input as unsafe, and white list known good characters
E. Execute all user-supplied scripts in aserver-side sandbox.