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,

1081

what is the significance of listiterator in java?

IBS,

1078

Can you instantiate the math class in Java?

IBS,

1088

what are the methods in object?

IBS,

1146

What is encapsulation in java?

IBS, NIIT,

1109

what is singleton class in java?

Cap Gemini,

1047

what is thread in Java ?

1157

Can You Have Virtual Functions In Java?

1144

What do you know about the garbage collector in java?

TCS,

1085

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

Tech Mahindra,

1228

What is the advantage of OOP in java?

1146

What is a copy constructor in java?

Amazon,

1118

what is function overloading in java?

Tavant Technologies, TCS, Virtusa,

1294

what is recursion in java

Cap Gemini,

1169

what is abstract class in Java?

Hexaware, Syntel,

1115

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Un-Answered Questions { Core Java }

What are the types of collections in java?

1053

Explain the concept of proper inheritance?

1066

How do you check if a number is a perfect square?

992

Do extraneous variables affect validity?

909

Are the imports checked for validity at compile time? Will the code containing an import such as java.lang.abcd compile?

1103

What languages are pass by reference?

1047

How many types of assembly languages are there?

967

Is an integer an object?

960

What is parsing a string?

1167

Can you instantiate the math class in Java?

1088

What is difference between equals and hashcode method?

1126

What are the two parts of a conditional statement?

961

What is procedure writing?

965

what is a working thread? : Java thread

1030

How much is a java license?

923

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