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Question about number of objects created

 
Marco Farrugia
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1. StringBuffer s1 = new StringBuffer("abc");
2. StringBuffer s2 = s1;
3. StringBuffer s3 = new StringBuffer("abc");

How many objects are created ?

My answer is 3, but the exam practice I am using says 4. Can someone confirm please? I know the exam practice I am using contains a lot of mistakes, so I am not trusting it.
 
Jelle Klap
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Two StringBuffer instances and one String instance, as the literal value "abc" will end up in the String constant pool as a single instance.
So that makes three objects, like you said.

Also, please don't forget to QuoteYourSources (<-click): which practice exam are you using?
 
Marco Farrugia
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I did not want to give the source a bad name by saying that there are lots of mistakes, but that's the truth, but not that I inserted the name of the website, the forum is not allowing me to add it because it is banned. Anyway it's tf360 and I doubt it that it is giving real questions for 1Z0-804 (some are too easy, others have mistakes in answers as well as spelling). In fact I am going to look for another one.

I desperately need suggestions for a good 1Z0-804 exam practice with correct answers, matching choice of topics and good explanations!!!
 
I agree. Here's the link: http://aspose.com/file-tools
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