INTERVIEW QUESTIONS J2EE JAVA DETAILS

Question: IBM Interview Questions in Bangalore

Answer: 6.what is single inheritance.

ans:one class is inherited by only other one class
7.what is multiple inheritance.

ans:One class inheriting more than one class at atime


8.can java support multiple inheritance.

ans:No
9.what is interface.

ans:Interface has only method declarations but no defn
10.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


11.how to u prove that abstrace class cannot instantiate directly.

ans:As they dont have constructor they cant be instantiated


12.what is differenece between string and stringbuffer.

ans:Strings are immutable where as string buffer can be modified


13.what is immutable

ans:Which cant be changed
.
19.what is main difference hashmap and hastable

ans:Hash table is synchronised
20.what is main difference between arraylist and vector.

ans:Vector is synchronised
21.what is struts framework.

ans:It follows MVC architecture which is used for seperating view,controller,model


24.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


25.what is difference between procedure and functions.'

ans:Fuctions can return value ,procedures cant return value


26.what is jdbc.

ans:Connecting to DB from java program requires JDBC
27.what are type of drivers.

type1,2,3,4


31.what is deployment descriptor.

ans:Which contains the infrnmation like which file to be used



40.what is platfrom independent

ans:A language is said to be platform independent if it can be run on any machine with out modifying code


41.what is awt and swing.

ans:AWT are heavy weight components and swings are light weight components


46.what is major concepts in oops.

ans:Abstraction,polymorphism,encapsulation,inheritance


47.why u choose mvc-2 architecture.

ans:In MVC-2 controller is servlet rather than JSP which makes it efficient


48.what is implicit object.

ans:Implicit objects are a set of Java objects that the JSP Container makes available to developers in each page


49.how many implicit objects in jsp

ans:out,page,session,request,response,application,page context,config

6.what is single inheritance.

ans:one class is inherited by only other one class
7.what is multiple inheritance.

ans:One class inheriting more than one class at atime


8.can java support multiple inheritance.

ans:No
9.what is interface.

ans:Interface has only method declarations but no defn
10.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


11.how to u prove that abstrace class cannot instantiate directly.

ans:As they dont have constructor they cant be instantiated


12.what is differenece between string and stringbuffer.

ans:Strings are immutable where as string buffer can be modified


13.what is immutable

ans:Which cant be changed
.
19.what is main difference hashmap and hastable

ans:Hash table is synchronised
20.what is main difference between arraylist and vector.

ans:Vector is synchronised
21.what is struts framework.

ans:It follows MVC architecture which is used for seperating view,controller,model


24.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


25.what is difference between procedure and functions.'

ans:Fuctions can return value ,procedures cant return value


26.what is jdbc.

ans:Connecting to DB from java program requires JDBC
27.what are type of drivers.

type1,2,3,4


31.what is deployment descriptor.

ans:Which contains the infrnmation like which file to be used



40.what is platfrom independent

ans:A language is said to be platform independent if it can be run on any machine with out modifying code


41.what is awt and swing.

ans:AWT are heavy weight components and swings are light weight components


46.what is major concepts in oops.

ans:Abstraction,polymorphism,encapsulation,inheritance


47.why u choose mvc-2 architecture.

ans:In MVC-2 controller is servlet rather than JSP which makes it efficient


48.what is implicit object.

ans:Implicit objects are a set of Java objects that the JSP Container makes available to developers in each page


49.how many implicit objects in jsp

ans:out,page,session,request,response,application,page context,config



Source: CoolInterview.com

implicit objects in jsp
out,request,response,session,
applicaton,config,page,pageContext
exception Source: CoolInterview.com

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