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 instanceof keyword?

1272

What does super keyword do?

1151

What is the difference between JDK and JVM?

1345

How to sort a collection of custom Objects in Java?

1113

What are the important features of Java 8 release?

1143

What is finally and finalize in java?

1160

Why Java doesn’t support multiple inheritance?

1089

Why Java is not pure Object Oriented language?

1166

What is static import?

1235

What is Java Reflection API? Why it’s so important to have?

1245

What is Java Package and which package is imported by default?

1155

What is break and continue statement?

1173

What are the important features of Java 11 release?

1166

Which class is the superclass of all classes?

1158

Java Compiler is stored in JDK, JRE or JVM?

1570

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Un-Answered Questions { Core Java }

What is the difference between the reader/writer class hierarchy and the inputstream/outputstream class hierarchy in java programming?

1186

How can we find the actual size of an object on the heap?

1362

Why does java not support pointers?

1178

What is a boolean in java?

1109

What is cr keyboard?

1350

Convert a BST into a DLL and DLL to BST in place.

1158

What is the purpose of garbage collection in java?

1144

When is the arraystoreexception thrown?

1088

Can you inherit a constructor java?

1139

What is a flag and how does it work?

1076

Explain when noclassdeffounderror will be raised ?

1102

What is the difference between break and continue statements?

1100

Why destructor is not used in java?

1037

What is substring in java?

1308

What is the difference between char and char *?

1155

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