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

Core Java Interview Questions

Questions Answers Views Company eMail

Can I use % with real numbers?

1089

Why is the type for real numbers called double?

1025

Explain when we should make an instance variable private.

1203

What is finalize()?

1275

When should we create our own custom exception classes?

1065

Can we pass a primitive type by reference in java? How

987

When do I need to use reflection feature in java?

1140

Why does java have two ways to create child threads? Which way is better?

1112

Why does java have different data types for integers and floating-point values?

1071

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

1203

Is finalize() similar to a destructor?

1084

Explain the difference between protected and default access.

1052

Explain how to convert any java object into byte array.

1014

What is finalize()? Is finalize() similar to a destructor?

1009

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

1044

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Un-Answered Questions { Core Java }

Difference between object instantiation and construction ?

1119

What are basic keywords?

1080

Can inner class have constructor?

1105

What is the advantage of OOP in java?

1211

Explain different forms of polymorphism?

1201

Can a class extends itself in java?

1074

How to do a true java ping from windows?

1247

What is generics in java interview questions?

1140

How do I convert a numeric ip address like 192.18.97.39 into a hostname like java.sun.com?

1070

take an array with -ve and +ve value both.find out the nearest value of 0(zero).if two values are same like(-2 and +2)then extract +2 is nearest of 0(zero).

2050

What happens when a thrown exception is not handled?

1207

Name component subclasses that support painting in java programming?

1125

Is java developer a good career?

1087

Write a program to check string is palindrome without using loop?

1098

What is a variable analysis?

1145

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