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 are the methods of object class ?

1047

What are different types of inner classes ?

1039

What is stringjoiner ?

951

Difference between final and effectively final ?

1090

Difference between abstract and concrete class ?

1164

Can we create an object if a class doesn't have any constructor ( not even the default provided by constructor ) ?

1073

Can we access instance variables within static methods ?

1082

What is the use of optional ?

1030

Difference between doublesummarystatistics, intsummarystatistics and longsummarystatistics ?

984

Difference between final and effectively final ? Why is effectively final even required ?

978

Similarity and difference between static block and static method ?

914

Difference between class#getinstance() and new operator ?

1201

What is a lambda expression ? What's its use ?

1094

Describe what happens when an object is created in java ?

998

Difference between == and .equals() ?

993

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Un-Answered Questions { Core Java }

Explain how to force the garbage collection in java.

958

What is the purpose of checked and unchecked exceptions in JAVA?

998

Can you achieve runtime polymorphism by data members?

1140

How to create a fecelet view?

981

How does a for loop work java?

1027

Why is java called the platform independent programming language?

1001

What is the point of polymorphism java?

1000

Why java strings are immutable in nature?

1052

How do I find and replace in word?

972

What is foreach loop in java?

1002

What are the object and class classes used for?

1036

Can we create constructor in abstract class ?

1043

Does substring create a new object?

991

How will you invoke any external process in java?

1105

What is the use of pattern in java?

1052

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