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Oracle Java Standard Edition 6 Programmer Certified Professional Exam 1Z0-851
Exam Number/Code : 1Z0-851
Exam Name : Java Standard Edition 6 Programmer Certified Professional Exam
One year free update
Once failed,100% refund
Questions and Answers : 210Q&As
Update Time : 2012-8-18
Price : $79.00
Java Standard Edition 6 Programmer Certified Professional 1z0-851 Exam Topics
Section 4: Concurrency
Write code to define, instantiate, and start new threads using both java.lang.Thread and java.lang.Runnable.
Recognize the states in which a thread can exist, and identify ways in which a thread can transition from one state to another.
Given a scenario, write code that makes appropriate use of object locking to protect static or instance variables from concurrent access problems.
Section 5: OO Concepts
Develop code that implements tight encapsulation, loose coupling, and high cohesion in classes, and describe the benefits.
Given a scenario, develop code that demonstrates the use of polymorphism. Further, determine when casting will be necessary and recognize compiler vs. runtime errors related to object reference casting.
Explain the effect of modifiers on inheritance with respect to constructors, instance or static variables, and instance or static methods.
Given a scenario, develop code that declares and/or invokes overridden or overloaded methods and code that declares and/or invokes superclass, or overloaded constructors.
Develop code that implements “is-a” and/or “has-a” relationships.
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111.A company has a business application that provides its users with many different reports: receivables reports, payables reports, revenue projects, and so on.
The company has just purchased some new, state-of-the-art, wireless printers, and a programmer has been assigned the task of enhancing all of the reports to use not only the company’s old printers, but the new wireless printers as well.
When the programmer starts looking into the application, the programmer discovers that because of the design of the application, it is necessary to make changes to each report to support the new printers. Which two design concepts most likely explain this situation? (Choose two.)
A. Inheritance
B. Low cohesion
C. Tight coupling
D. High cohesion
E. Loose coupling
F. Object immutability
Answer: B,C
113.A team of programmers is reviewing a proposed API for a new utility class. After some discussion, they realize that they can reduce the number of methods in the API without losing any functionality. If they implement the new design, which two OO principles will they be promoting?
A. Looser coupling
B. Tighter coupling
C. Lower cohesion
D. Higher cohesion
E. Weaker encapsulation
F. Stronger encapsulation
Answer: A
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