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Question ID 3851

Which two scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object? (Choose two.)
 

Option A

A.    When using versions of Java technology earlier than 5.0.
 

Option B

B.    When sharing a StringBuffer among multiple threads.
 

Option C

C.    When using the java.io class StringBufferInputStream.
 

Option D

D.    When you plan to reuse the StringBuffer to build more than one string.
 

Correct Answer A,B
Explanation


Question ID 3852

Given:

11.    String test = "a1b2c3";
12.    String[] tokens = test.split("\\d");
13.    for(String s: tokens) System.out.print(s + " "); What is the result?
 

Option A

A.    a b c
 

Option B

B.    1 2 3
 

Option C

C.    a1b2c3
 

Option D

D.    a1 b2 c3
 

Correct Answer A
Explanation

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