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,

1021

In Java list the methods that can be overridden?

Accenture,

1012

What do you mean by stack?

Accenture,

1152

Explain the term virtual machine?

Adobe,

1047

What is role of void keyword in declaring functions?

Adobe,

1050

Define array. Tell me about 2-D array.

Agilent,

1050

Give an example of call be reference significance.

Agilent,

1030

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

Agilent,

1134

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

Agilent,

1166

Differentiate between nested and inner class in java.

Akamai Technologies,

1002

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

Akamai Technologies,

1056

Define Multiprogramming and Multiprocessing in java.

Akamai Technologies,

1148

Explain an algorithm to find depth of a binary tree.

Akamai Technologies,

1044

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,

994

How to declare objects of a class ?

Akamai Technologies,

1077

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Un-Answered Questions { Core Java }

What does the exclamation mark mean in java?

1250

What are the important features of Java 11 release?

1118

What does ide stand for?

948

Difference between string, string builder, and string buffer?

1105

Can we have any code between try and finally blocks?

1021

Why lambda expression is used in java?

1061

What is difference between fail-fast and fail-safe?

1238

Does set allows null in java?

956

In java how do we copy objects?

1048

What is the difference between hashmap and hashtable in java?

1124

What is a super method?

978

What is the purpose of the enableevents() method in java programming?

1184

What is null in java?

970

What are unchecked exceptions in java?

1038

How many bits is a word?

1004

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