Java认证模考试题（十一）

Question: 56 
A. ScrollPane

B. Canvas

C. Scrollbar

D. Applet

E. Dialog

Explanation: 

Correct Answer: B,C 56 of 60

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

B. add a run() method in the class

C. create an instance of Thread

D. extend the Thread class

Explanation: 

Correct Answer: A,D 57 of 60

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

B. BufferedInputStream

C. PushbackInputStream

D. ByteArrayInputStream

Explanation: 

Correct Answer: A,D 58 of 60

 

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Java uses Unicode to represent strings and characters and Java provides 16 bit versions of streams to allow characters to be treated similarly. They are Reader, Writer and their subclasses.

Correct Answer: A,B,C 59 of 60

 
Which classes are used to implement TCP/IP client and servers?

B. Server

C. Socket

D. DatagramPacket

E. DatagramSocket

Explanation: 

Correct Answer: A,C 60 of 60