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 is the difference between equals() and?

1216

What is a ternary operator in java? What is an interface?

1013

Can a constructor call the constructor of parent class?

1054

What are serialization and deserialization?

1283

Explain the difference between the public, private, final, protected, and default modifiers?

1056

How would you convert bytes to string?

1005

Difference between Preemptive scheduling vs. Time slicing?

1038

Why we cannot override static method?

1076

What if the main() method is declared as private? What happens when the static modifier is removed from the signature of the main() method?

1205

What are the differences between include directive and include action?

1212

Is simpledateformat safe to use in the multithreaded program?

1013

What are the differences between getting and load method?

1213

What is the difference between throw and throws in java?

1121

What is the difference between path and classpath variables?

1072

State the significance of public, private, protected class?

1128

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Un-Answered Questions { Core Java }

What is the difference between final, finally and finalize()?

1174

What is the importance of static variable?

1135

What is prime number in java?

1015

What is java oops?

1103

What is unsigned char?

1084

Is oracle charging for java?

1055

what is object slice?

2098

How does thread synchronization occurs inside a monitor?

1138

What is difference between hashset and hashmap?

1138

Is java free for businesses?

1089

Difference between == and .equals() ?

1018

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

1184

Which is better ascii or unicode?

1009

Write a program to print count of empty strings in java 8?

1016

I want to re-reach and use an object once it has been garbage collected. How it's possible?

1038

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