Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

How many times garbage collector will invoke an object?s finalize() method?

4 7494

How applets will communicate with each other?

1 4299

What method is used to compare two strings ?

4 10250

How to know the host from which Applet is originated?

Wipro,

1 3579

How to prevent a field from serialization ?

2 10188

How to add panel to a Frame?

5 14872

How can a class be accessed, If no access modifiers are declared?

4 7860

How to access a method that it declared as protected?

3 6415

How to access a variable if it is declared as private?

3 7174

How to re-get an object that is collected by garbage collector?

1 4157

What we have to do, when we don't want to implement all methods of an interface?

5 8393

How to display names of all components in a Container?

Microsoft, Wipro,

2940

Name the package that most of the AWT events that supports event-delegation model are defined?

2 6505

What are Inner classes?

4 7265

Is &&= a valid Java operator?

2 13503

Post New Core Java Questions

Un-Answered Questions { Core Java }

How do you compare values in java?

1030

What is the use of protected in java?

1025

1.IN CASE OF DYNAMIC METHOD DISPATCH WHY WE USE REFERENCE VARIABLE,WE CAN USE THE DIFFERENT DEFINED OBJECT DIRECTLY TO ACCESS THE DATA MEMBER AND MEMBER FUNCTION OF THAT RESPECTIVE CLASS?WHAT IS THE MAIN FUNCTION OF "REFERENCE VARIABLE" HERE?

4953

explain copyonwritearraylist and when do we use copyonwritearraylist?

949

Can vector have duplicates in java?

951

What is var keyword ?

1190

Can we have more than one package statement in the source file?

1058

What are predicates in java 8?

1016

What is the differences between heap and stack memory in java? Explain

982

Is java 11 paid version?

985

State the difference between strings and arrays.

1246

Can a top level class be private or protected?

1056

What is variable in java?

987

What is the difference between a synchronized method and a synchronized block?

1072

Write code to implement bubble sort in java?

995

For More Un-Answered { Core Java } Questions Click Here