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 abstraction in java?

Akamai Technologies,

1146

what is the significance of listiterator in java?

IBS,

1126

Can you instantiate the math class in Java?

IBS,

1145

what are the methods in object?

IBS,

1209

What is encapsulation in java?

IBS, NIIT,

1175

what is singleton class in java?

Cap Gemini,

1116

what is thread in Java ?

1212

Can You Have Virtual Functions In Java?

1209

What do you know about the garbage collector in java?

TCS,

1140

What types of index data structures can you have in java?

Tech Mahindra,

1323

What is the advantage of OOP in java?

1210

What is a copy constructor in java?

Amazon,

1205

what is function overloading in java?

Tavant Technologies, TCS, Virtusa,

1367

what is recursion in java

Cap Gemini,

1254

what is abstract class in Java?

Hexaware, Syntel,

1174

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Un-Answered Questions { Core Java }

What is the difference between replace and replace all?

1079

Can a function return a function?

1101

What is the use of volatile in java?

1117

What is a class variable?

1099

What is use of map in java?

1062

What is a generic data type?

1125

What are the advantages of inner classes?

1069

What is the difference between length and length() method in java?

1173

What are the types of inner classes (non-static nested class) used in java?

1113

How does thread synchronization occurs inside a monitor?

1188

What is a null check?

1074

What is a jagged array in java?

1185

Are global variables initialized to zero?

1004

What happens if a try-catch-finally statement does not have a catch clause to handle an exception that is thrown within the body of the try statement?

1177

What is the use of http-tunneling in rmi?

1105

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