Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

What are autoboxing and unboxing? When does it occur?

977

What are the main uses of this keyword?

1078

What is the purpose of using javap?

1121

Can this keyword be used to refer static members?

1038

Why is method overloading not possible by changing the return type in java?

1016

Can there be an abstract method without an abstract class?

978

Write a program in java to create a doubly linked list containing n nodes.

989

How can we access some class in another class in java?

1004

What is a heavyweight component?

1040

Is constructor inherited?

981

Can we overload the constructors?

1011

What is the purpose of using java.lang.class class?

1030

What is the use of http-tunneling in rmi?

1067

Why can we not override static method?

1122

Can subclass overriding method declare an exception if parent class method doesn't throw an exception?

1101

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Un-Answered Questions { Core Java }

Explain different ways of creating a thread. Which one would you prefer and why?

1054

What is type parameter in java?

970

What is the collections api?

1066

Is there any way to skip finally block of exception even if some exception occurs in the exception block?

1078

How can constructor chaining be done using this keyword?

1298

What is byte [] in java?

1026

When should you make a function static?

1000

Can inner class have constructor?

1055

v-model life cycle

2055

Objects or references which of them gets garbage collected?

979

What is java abstraction with example?

1077

What is the use of bufferedreader?

1012

What is serialization in java?

1076

How do listeners work?

1062

What if constructor is protected in java?

1142

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