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 we declare a class as static?

1152

Can we have try without catch block?

1153

What is the use of System class?

1236

What is Enum in Java?

1447

What is Java Annotations?

1195

What are the important features of Java 9 release?

1066

When can we say that threads are not lightweight process in java?

1220

What is a blocking method in Java?

1337

What are the main differences between notify and notifyAll in Java?

1152

Can It is possible to synchronize the constructor of a Java Class?

1232

Can you start a thread twice in Java?

1178

What are the two main uses of volatile in Java?

1109

How to create a thread in java?

1199

How can you share data between two thread in Java?

1008

What is Java Shutdown Hook?

1276

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Un-Answered Questions { Core Java }

Explain why wait(), notify() and notifyall() methods are in object class rather than in the reading class?

1035

List the different types of classloaders in java.

1023

How much ram can a 64 bit processor theoretically?

970

How many types of parsers are there?

1084

What is arraylist e?

1157

What is Recursion Function?

1279

How many bits is a char?

1059

Justify your answer that you can't define a method inside another method in java, if you can then how?

1286

What are serialization and deserialization?

1323

What is byte value?

1058

What is difference between string and new string?

1085

What is skeleton and stub? What is the purpose of those?

1200

Can we overload run() method in java?

1277

Who developed java?

1069

What is string pool in java?

1077

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