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Mock Ques -Chap2 K &B

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In Drag and drop question ,7 of chap 2 in K &B
class AgedP
public AgedP(int x){}


In 2nd constrctor ,i was thinking of answer as
pblic AgedP(int x){this();} ,when i solved thw Question.

Just added this(); //which is not wrong as this ,( ) , and ; are present in tiles(options),these can be used 0 or more times

So my Solution is also correct.
So my Question is ------------------
In Real exam ,will there be only 1 solution of dragdrop in the database.
like here ,i made a different ,and correct one
or we should always go for minimal use of tiles ,unless mentioned.
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