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 domain object

1 4595

what are the analysis of an object

2 4263

why we need this (1.object,2.class,3.data hiding,4.encapsulation,5.abstraction,6. polymorphism,7.inheritance)

2 4818

What is the difference between Static and final?

1 5754

What is immutable class? how to make a Class explicitly "Immutable"?Wap to make a class explicitly immutable.

3 7427

How many types of JVM's (OR) Name of the JVM's which are used in Tomcat & Weblogic servers ?

TCS,

1 13163

how can i use a nonsynchronized hashtable?

CoreObjects,

2541

why we use merge option in hybernate pls give a ex snippet

CoreObjects,

1946

What are the Abstract Classes provided by Java?

Oracle,

5 10127

Why are inner classes required?

Oracle,

3 8226

what is the context

2 4259

Class A extends Class B but Class A also inherit Super Class Object so it is multiple inheritence give reason in support of your answer

3 5604

relation between list and linked list

Infosys,

1 4371

use of wrapper classes?

IBM,

3 6612

what r callable statement and give their proper use

2 5755

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Un-Answered Questions { Core Java }

How do you call a reference in java?

932

Explain what is Marker interface?

1049

Can we force the garbage collection to run?

909

What is a java list?

1058

What is anti pattern in java?

918

Difference between a class and an object?

984

What is the reflection?

955

What is the basic concept of java?

981

What is the difference between double and float variables in java?

1098

What is difference between Heap and Stack Memory?

1000

What is a literal coding?

982

What do you mean by jjs in java8?

956

Difference between == and .equals() ?

957

What is the mapping mechanism used by java to identify IDL language?

973

Why are constructors used?

973

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