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 will happen if a thrown exception is not handled?

ABB, Akamai Technologies, Infogain,

1016

In Java list the methods that can be overridden?

Accenture,

1004

What do you mean by stack?

Accenture,

1150

Explain the term virtual machine?

Adobe,

1042

What is role of void keyword in declaring functions?

Adobe,

1046

Define array. Tell me about 2-D array.

Agilent,

1048

Give an example of call be reference significance.

Agilent,

1029

In case of inheritance what is the execution order of constructor and destructor?

Agilent,

1133

What is the difference between a vector & an array list?

Agilent,

1162

Differentiate between nested and inner class in java.

Akamai Technologies,

998

'A class is a template for an object' explain this statement.

Akamai Technologies,

1054

Define Multiprogramming and Multiprocessing in java.

Akamai Technologies,

1144

Explain an algorithm to find depth of a binary tree.

Akamai Technologies,

1039

Given a singly linked list, how will you print out its contents in the reverse order? Can you do it with consuming any extra space?

Akamai Technologies,

986

How to declare objects of a class ?

Akamai Technologies,

1071

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Un-Answered Questions { Core Java }

What do negative exponents mean?

1037

What is flag in python?

1031

How do you take thread dump in java?

995

How do you ensure that n threads can access n resources without deadlock?

1306

What is a native method in java programming?

1063

What are the drawbacks for singleton class?

1013

Is an array a vector?

1034

What is an iterator interface in java programming?

957

Explain 5 io best practices?

1027

Can a source file contain more than one class declaration?

975

Which class is the superclass for all the classes?

1020

Differences between C and Java?

1192

Explain the difference between hashmap and hashtable in java?

943

How do I compare two strings in word in java?

991

What is meant by final class?

1106

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