1Z0-807 | 10 Tips For Renew 1Z0-807 practice test
Q41. A company provides call center support for corporations world-wide. Each agent in the call center can be assigned to multiple call center customers. All the company's customers use Windows based user interfaces and it has Just signed a new customer that uses a Java EE back end and wants a rich interface.
The company is developing a user interface for the new customer with the following requirements:
Customer service representatives (CSRs) must be able to work with minimal training on the application.
CSRs must be able to switch between call center systems quickly.
Screens must have a windows look and feel.
2000 agents spread across four locations must be able to use the system.
Which recommendation would you make to this company about the user interface (UI)?
A. Write the UI using JSP and JSTL.
B. Write the UI using JSPs with embedded script lets.
C. Write the UI using AJAX, Accessing servlets directly.
D. Write the UI using Java Swing and describe using JNLP.
Answer: D
Q42. You are using an open source integration framework in your project. However, key interfaces do not explicitly define several strange conditions you have repeatedly seen while testing.
Which option is the name given to the anti pattern described above?
A. Composite View
B. Leaky Abstraction
C. Asynchronous Interaction
D. Golden Hammer
Answer: B
Q43. Your company provides a marketplace for industrial chemicals. You are required to offer accurate pricing and quantities to all marketplace users.
Marketplace users are globally distributed.
What is the most appropriate technology to use to satisfy this requirement?
A. Server-side distribution using JAX-WS
B. Client-side polling using JAX-RPC
C. Web services using REST
D. An enterprise messaging system
Answer: C
Q44. A travel company re-architects its application from a two-tier to a three-tier architecture. To see what impact the new architecture has on its non-functional requirements (NFR), the company intends to build a prototype based on the new architecture.
The company compares the NFR metrics associated with the new prototype against the metrics from their original two-tier solution.
Which option is an advantage of the original two-tier solution?
A. It has better availability because it has fewer single points of failure.
B. It has better manageability because each client has its own copy of the application.
C. It has better performance because each client must use its own set of domain objects.
D. It has better scalability because each client can access the database independently of other clients.
Answer: A
Q45. You have been tasked with improving the availability of an existing three tier application.
What is your first stop in evaluating what changes should be made to the architecture to achieve the goal?
A. Monitor network traffic between tiers.
B. Separate presentation from business logic.
C. Identify and document all single points of failure.
D. Cluster the presentation tier without session replication.
Answer: C
Q46. You are integrating with a single legacy Enterprise Information System. You are interested in the transaction management capabilities of Java Connector Architecture. This new system needs the capability to invoke multiple operations against this single legacy system. these operations succeeded together or fail together as a group.
To which minimum level of transaction management do you set your resource adapter?
A. No transaction
B. Local transaction
C. Distributed transaction
D. Container-managed transaction
Answer: B
Q47. Which three actions represent best practices when implementing an exception handling strategy for an application?
A. Create a custom checked exception if an alternative action can be taken to resolve the exception.
B. Create a custom unchecked exception if the action to resolve the exception cannot be defined.
C. Always log the specific exception before re-throwing a wrapped exception.
D. Always throw exceptions in methods that are designed for exception handling.
E. Always include information specific to the error when logging an exception.
Answer: ABE
Q48. You have been recruited by an online retailer of footwear to conduct a review of their online systems. Your primary Finding is that the development team has implemented duplicated complex business logic as Java scripts directly into the JSPs, causing performance, scalability, and maintainability issues.
Which two design patterns would you select to improve the current code base?
A. View Helper
B. From Controller
C. Composite View
D. Service-to-Worker
E. Business Delegate
Answer: BD
Q49. Which two statements are true about the timer service of 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 message driven 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 hark, the timer creation within the transaction is also rolled back.
Answer: BE
Q50. 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.
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.
Answer: D