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IBM Interview Questions in Bangalore

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1.What is single inheritance. ans:one class is inherited by only other one class 2.What is multiple inheritance. ans:One class inheriting more than one class at atime. 3.Can java support multiple inheritance. ans:No 4.what is interface? ans:Interface has only method declarations but no defn 5.What is differenec between abstract class and interface? ans:In abstract class some methods may contain definition,but in interface every method should be abstract. 6.How to you prove that abstrace class cannot instantiate directly? ans:As they dont have constructor they cant be instantiated 7.What is differenece between string and stringbuffer? ans:Strings are immutable where as string buffer can be modified. 8.What is immutable? ans:Which cant be changed 9.What is main difference hashmap and hastable? ans:Hash table is synchronised 10.What is main difference between array list and vector? ans:Vector is synchronised 11.What is struts framework? ans:It follows MVC architecture which is used for seperating view,controller,model 12.What is main difference between jsp and servlets. ans:Jsp s are mainly used for dynamic presenatations where we can write code of design and actual content seperately.mainly coding becomes feasible 13.What is difference between procedure and functions? ans:Fuctions can return value ,procedures cant return value 14.What is jdbc? ans:Connecting to DB from java program requires JDBC 15.What are type of drivers? type1,2,3,4 java suports multithreading Answered By: rahul    Date: 12/20/2007 © NewInterviewQuestions.com

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