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,

1202

How is the marker interface used in Java?

BirlaSoft,

1100

Java is Pass by Value or Pass by Reference?

BirlaSoft,

1045

When is the garbage collection used in Java?

BirlaSoft,

1202

what is meant by Garbage collection?

Cap Gemini,

1094

what is meant by HQL?

Cap Gemini,

1071

How many types of literals are there in JAVA?

Cap Gemini,

1046

Where is the singleton class used?

Cap Gemini,

1031

why Java does not support multiple inheritances?

Aspire,

1160

give an example for encapsulation?

Aspire,

1047

Explain the pointers in Java?

Aspire,

1052

what is meant by Byte code concept in Java?

Aspire,

1070

what is meant by abstract class?

Aspire,

1126

what is meant by encapsulation?

Aspire,

1083

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

Aspire,

1033

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Un-Answered Questions { Core Java }

Name some classes present in java.util.regex package.

1031

What is an image buffer?

995

What is math floor in java?

949

In case of inheritance what is the execution order of constructor and destructor?

1134

Where is singleton pattern used?

993

Can a final method be overloaded?

944

What is appletviewer?

1037

What is the transient keyword?

2177

Can list contain null in java?

1085

What is a platform?

1076

What are the ways to instantiate the class class?

1104

How do you do math powers in java?

1060

Why java is said to be pass-by-value ?

1043

What is command line argument

1195

How do I get 64 bit java?

1113

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