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Pls help me out to solve this question

 
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I got this example from a mock site with some options .... when i tried to compile this its given me compile time error saying identifier expected... for each lines.


1. StringBuffer sb = new StringBuffer("abc");
2. String s = new String("abc");
3. sb.append("def");
4. s.append("def");
5. sb.insert(1, "zzz");
6. s.concat(sb);
7. s.trim();
 
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It should give compile time error as append()
method is not in String class..
 
Greenhorn
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even concat method of String need to have argument of type String.


-Gaurav
 
Tusshar Fasate
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Yaa Gaurav is right.
Its second compile time error in code
 
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Poonam Agarwal,
When you post mock questions to the ranch you must also QuoteYourSources.
If you don't add a valid source for this question, it will need to be removed.
 
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