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JavaBeans internals - Quiz
Each question is worth one point. Select the best answer for each question.
1.
The data part of a Bean is important because it:
A.
Is directly accessible by programmers.
B.
Allows programmers access to the internal state of the Bean.
C.
Completely describes the state of the Bean.
2.
The most important type of methods for accessing Beans are:
A.
Public methods.
B.
Private methods.
C.
Static methods.
3.
An interface is a functionally related group of:
A.
Data.
B.
Beans.
C.
Publically defined methods.
4.
Indexed properties often include an additional pair of accessor methods because:
A.
There are so many elements.
B.
It is useful to be able to access either an individual element or the entire array of elements.
C.
It is strictly required that access be granted both to individual elements and the entire array of elements.
5.
Individual elements of an indexed property are accessed through an accessor method using:
A.
An integer index.
B.
The location of the previous element.
C.
The name of the element.
6.
Bound properties are considered bound because they:
A.
Have limits on their values.
B.
Can not be written to.
C.
Notify an outside party whenever their value changes.
7.
To reject the new value of a constrained property, a constrained property listener must:
A.
Set the property back to its previous value.
B.
Throw a PropertyVetoException exception.
C.
call the
vetoableChange()
method.
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Quiz Explanation