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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.
The demo for 1Z0-851 dumps
free download111.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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