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

Core Java Interview Questions

Questions Answers Views Company eMail

Give few examples of final classes defined in Java API?

BirlaSoft,

1283

How is the marker interface used in Java?

BirlaSoft,

1142

Java is Pass by Value or Pass by Reference?

BirlaSoft,

1094

When is the garbage collection used in Java?

BirlaSoft,

1262

what is meant by Garbage collection?

Cap Gemini,

1150

what is meant by HQL?

Cap Gemini,

1121

How many types of literals are there in JAVA?

Cap Gemini,

1103

Where is the singleton class used?

Cap Gemini,

1082

why Java does not support multiple inheritances?

Aspire,

1206

give an example for encapsulation?

Aspire,

1093

Explain the pointers in Java?

Aspire,

1108

what is meant by Byte code concept in Java?

Aspire,

1132

what is meant by abstract class?

Aspire,

1183

what is meant by encapsulation?

Aspire,

1130

what is the difference between Object Based Language and Object Oriented Language?

Aspire,

1087

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Un-Answered Questions { Core Java }

Can we sort arraylist in java?

1044

How do weakhashmap works?

1203

What is the core java?

1005

Can you tell me range of byte?

1056

how to know the total memory occupied by the objects in the ArrayList(Array list may contain duplicate objects)

2392

FOR EXAMPLE WE R HAVING TWO LIST ELEMENTS ..BOTH LISTS CONTAINS ID,NAME,PLACE ..I NEED TO COMPARE BOTH IDS IN TWO LISTS,IF ID'S R SAME MEANS WE HAVE ADD THE DETAILS(LIKE NAME,PLACE) TO MAP...HOW IS POSSIBLE ?CAN ANY ONE SUGGEST?

3557

What is a consumer in java?

1072

What is memory leak and how does java handle it?

1030

What is javac used for?

986

Why inputstreamreader is used in java?

1057

How many bits is a boolean?

1133

Are static members inherited to sub classes?

1187

What is size_t?

1035

What is square root in java?

1178

What is the use of arraylist in java?

1158

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