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 9153

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

4 8110

Can Applet have constructors?

Infosys,

5 27925

Can an exception be rethrown?

Wipro,

4 14407

Can try statements be nested?

Wipro,

3 9299

Can we access a database using applets?

Hewitt,

2 7839

Can you extend more than one interface?

9 23826

Can you have a constructor in abstract class?

HCL,

18 54440

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

2 8672

Can you run the product development on all operating systems ?

1 6623

what are Checked & Unchecked exceptions ?

2 8149

What will happens if you opened Internet Explorer 4 times?

2 6040

What is the default modifier in Interface?

5 14773

Define Compiling?

3 7015

Difference between canvas class & graphics class?

1 9507

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Un-Answered Questions { Core Java }

What is multithreading in java?

1104

What is difference between printf and scanf?

1222

What do you understand by soft reference?

1098

What is bean? Where it can be used?

1137

Can we serialize static variables in java?

1142

How we can generate random numbers in java?

1169

Define a java class.

1527

Why does java not support operator overloading?

1183

What is a ?

1268

What is java developer skills?

1023

What are triggers in DB? Explain their types. How do they work?

1137

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

1195

What do you mean by buffering?

1085

How variables are stored in memory?

1049

Write a java program to check if a number is prime or not?

1080

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