多项选择题

A JavaBeans component has the following field：
11. private boolean enabled；
Which two pairs of method declarations follow the JavaBeans standard for accessing this field？（）

A.A
B.B
C.C
D.D

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单项选择题

Given：

What is the result？（）

A. An exception is thrown at runtime.
B. r， e， o，
C. Compilation fails.
D. r， t， t，

单项选择题

Click the Exhibit button.
Given： ClassA a = new ClassA（）；
a.methodA（）；
What is the result？（）

A. The code runs with no output.
B. Compilation fails.
C. An exception is thrown at runtime.
D. ClassC is displayed.

单项选择题

Given：

What is the result of calling search with a valid List implementation？（）

A. 0
B. The result is undefined.
C. a
D. 2
E. 1
F. c
G. b