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?

1223

What does super keyword do?

1079

What is the difference between JDK and JVM?

1279

How to sort a collection of custom Objects in Java?

1065

What are the important features of Java 8 release?

1092

What is finally and finalize in java?

1101

Why Java doesn’t support multiple inheritance?

1049

Why Java is not pure Object Oriented language?

1119

What is static import?

1180

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

1172

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

1104

What is break and continue statement?

1104

What are the important features of Java 11 release?

1123

Which class is the superclass of all classes?

1111

Java Compiler is stored in JDK, JRE or JVM?

1524

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Un-Answered Questions { Core Java }

Does java return by reference?

1022

What is comparator in java?

1009

What is java util?

1030

Give a brief description of java socket programming?

970

Is a string literal?

1109

List implementations of list interface?

1041

Can you sort a list in java?

987

What is the benefit of inner / nested classes ?

990

How does java enable high performance?

1158

If an object reference is set to null, will the garbage collector immediately free the memory held by that object?

1159

What occurs when an object is constructed?

1010

What is the current version of java?

1045

How many types of equations are there?

1022

What is the difference between private & public & friendly classes?

1078

how can i use a nonsynchronized hashtable?

2575

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