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Core Java Interview Questions
Questions Answers Views Company eMail

Why null interfaces are used in Java?

2 6372

What is a Wrapper class?

14 36809

Write a program for recursive Traverse?

1 4282

Write a program to create a binary Tree ?

2 7478

what are Hostile Applets?

1216

what is a transient variable?

5 8161

what is the JNDI?

3 4679

What JNDI(Java Naming and Directory Interface) provides?

4 4600

Explain, why the constructor is required in implemented class?

4 5724

is java support call by reference and call by value, if supports please explain?

5 18613

what is the difference between the "protected and default" modifiers?

8 19459

where u use Abstraction and Interface in real time

Sonata,

3 6063

Difference between JDK, JRE, JVM

Deloitte, HCL, Mind Tree, Oracle, Reliance, TCS, ThinkBox,

16 86513

what do you meant by Platform-Independent?

Persistent,

6 10094

Why Java is not purely object oriented?

Elitecore, Persistent, Reliance, Wipro,

50 54136


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Un-Answered Questions { Core Java }

What is style and indentation?

200


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

207


What is the original name of java?

172


What is the purpose of final keyword and when to use it?

195


What are the two categories of data types in the java programming language?

164






Is null == null in java?

197


What is the difference in between cpp and java? Can u explain in detail?

236


What is java string pool?

187


How to read and write image from a file ?

217


How we create object in copy constructor?

254


What is the purpose of garbage collection in java?

207


Can we create more than one object singleton class?

167


Explain the Propertie sof class?

231


What is the preferred size of a component in java programming?

205


What is supplier in java?

177