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 8802

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

4 7699

Can Applet have constructors?

Infosys,

5 27489

Can an exception be rethrown?

Wipro,

4 13937

Can try statements be nested?

Wipro,

3 9066

Can we access a database using applets?

Hewitt,

2 7584

Can you extend more than one interface?

9 23208

Can you have a constructor in abstract class?

HCL,

18 53242

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

2 8452

Can you run the product development on all operating systems ?

1 6451

what are Checked & Unchecked exceptions ?

2 7879

What will happens if you opened Internet Explorer 4 times?

2 5838

What is the default modifier in Interface?

5 14354

Define Compiling?

3 6689

Difference between canvas class & graphics class?

1 9339

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Un-Answered Questions { Core Java }

What is autoboxing and unboxing?

947

How can we make a class singleton?

1002

How to print an arraylist in java?

1000

How can a gui component handle its own events in java programming?

972

Explain the use of shift operator in java. Can you give some examples?

914

How many wrapper classes are there in java?

964

What are different types of arrays?

953

Can an object subclass another object?

1019

Is integer immutable in java?

925

What is the difference between replace and replace all?

944

Can we have any code between try and catch blocks?

928

What is identifier give example?

974

Explain the difference between private, public, package and protected in java?

992

What is the difference between variable declaration and variable initialization?

978

What is the use of put method?

891

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