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,

1028

what is the significance of listiterator in java?

IBS,

1039

Can you instantiate the math class in Java?

IBS,

1029

what are the methods in object?

IBS,

1100

What is encapsulation in java?

IBS, NIIT,

1057

what is singleton class in java?

Cap Gemini,

1000

what is thread in Java ?

1108

Can You Have Virtual Functions In Java?

1092

What do you know about the garbage collector in java?

TCS,

1048

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

Tech Mahindra,

1143

What is the advantage of OOP in java?

1089

What is a copy constructor in java?

Amazon,

1062

what is function overloading in java?

Tavant Technologies, TCS, Virtusa,

1230

what is recursion in java

Cap Gemini,

1089

what is abstract class in Java?

Hexaware, Syntel,

1076

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Un-Answered Questions { Core Java }

What are keywords give examples?

1004

What is keyword auto for?

1116

What is variable in java?

924

Explain the init method?

928

Explain about main thread in java?

1043

How do you override a method in java?

961

Why is the type for real numbers called double?

917

What are internal and external variables?

916

What is the importance of hashcode() and equals() methods?

1012

What does it mean to be immutable?

928

What is an object’s lock and which object’s have locks?

902

What is the base class in java from which all classes are derived?

931

What is gui programming?

967

What is the synonym of string?

1044

Why char array is favored over string for the storage of passwords?

1013

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