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

Core Java Interview Questions

Questions Answers Views Company eMail

Does 'true' and 'false' are keywords?

5 9001

As a developer what steps do you take to improve the performance?

4 7919

Can Applet have constructors?

Infosys,

5 27719

Can an exception be rethrown?

Wipro,

4 14165

Can try statements be nested?

Wipro,

3 9184

Can we access a database using applets?

Hewitt,

2 7724

Can you extend more than one interface?

9 23512

Can you have a constructor in abstract class?

HCL,

18 53895

Can you have an inner class inside a method and what variables can you access?

2 8565

Can you run the product development on all operating systems ?

1 6518

what are Checked & Unchecked exceptions ?

2 8022

What will happens if you opened Internet Explorer 4 times?

2 5951

What is the default modifier in Interface?

5 14588

Define Compiling?

3 6882

Difference between canvas class & graphics class?

1 9426

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Un-Answered Questions { Core Java }

What is byte code and why is it important to java’s use for internet programming?

1123

Why do we need data structure in java?

1065

How to find the given number is a prime number or not by getting input from the user

1094

What is java autoboxing?

941

Mention the default values of all the elements of an array defined as an instance variable.

982

Explain about abstract classes in java?

1030

Does java allow overriding static methods ?

1112

Why is a singleton bad?

950

What is serialversionuid?

1084

How can I right-justify a string?

1167

What are the different types of java?

1060

What is the constructor?

1049

how to create multithreaded program? Explain different ways of using thread? : Java thread

978

Can we create object of static class?

1021

What is append function?

993

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