Java认证模考试题（十一）

来源：java认证发布时间：2012-11-12 12:47:31java认证视频

Question: 56

Which are not containers in Java?

A. ScrollPane

B. Canvas

C. Scrollbar

D. Applet

E. Dialog

Explanation:

Scrollbar and Canvas are not containers. The following classes are containers in Java: Panel, Window, ScrollPane, Dialog, Frame, Applet.

Correct Answer: B,C 56 of 60

Question: 57

Which of the following method can be used to define a new thread class?

A. implement the Runnable interface

B. add a run() method in the class

C. create an instance of Thread

D. extend the Thread class

Explanation:

Two methods can define a new thread class: to implement the Runnable interface or to extend the Thread class.

Correct Answer: A,D 57 of 60

Question: 58

Which of the following I/O stream are node streams?

A. FileInputStream

B. BufferedInputStream

C. PushbackInputStream

D. ByteArrayInputStream

Explanation:

The FileInputStream and ByteArrayInputStream are node streams. The BufferedInputStream and PushbackInputStream are filter streams.

Correct Answer: A,D 58 of 60

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