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

Core Java Interview Questions

Questions Answers Views Company eMail

Explain different types of wrapper classes in java?

1038

Explain where variables are created in memory?

1026

Explain about varargs in java?

1144

When do we use hashset over treeset?

1074

What happens if we don’t define serial version uid?

1041

What is the main purpose of serialization in java?

1053

In which order the iterator iterates over collection?

1003

Can we use switch statement with strings?

1060

Explain about automatic type conversion in java?

1057

Explain listiterator and methods in listiterator?

1030

Explain importance of inheritance in java?

1040

In java how do we copy objects?

1065

Explain what is encapsulation?

1102

Explain list interface?

972

Define interface in java?

1096

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Un-Answered Questions { Core Java }

What is java and its types?

1113

How do I get the | symbol on my keyboard?

1099

What is the Concept of Encapsulation in OOPS

1009

What is main difference between variable and constant?

1053

What is difference between iterator access and index access?

1078

What is meant by class and object in java?

1056

Explain the importance of finalize() method.

981

What is boolean keyword in java?

1144

Can we have multiple public classes in a java source file?

1208

Is 0 a prime number?

1005

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

1141

What is an class?

1050

What is an example of character?

1149

Is minecraft java edition free?

1137

Can you give names of Container classes?

2321

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