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 ?

1053

What are different types of inner classes ?

1045

What is stringjoiner ?

953

Difference between final and effectively final ?

1097

Difference between abstract and concrete class ?

1167

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

1081

Can we access instance variables within static methods ?

1089

What is the use of optional ?

1033

Difference between doublesummarystatistics, intsummarystatistics and longsummarystatistics ?

984

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

985

Similarity and difference between static block and static method ?

917

Difference between class#getinstance() and new operator ?

1203

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

1100

Describe what happens when an object is created in java ?

1002

Difference between == and .equals() ?

998

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Un-Answered Questions { Core Java }

Write an algorithm program in java for the following question.. 1) S is a set of integers.X is an integer obtained by sum of two digits in S. Write logic for whether or not the X is from the S. The time of algorithm should not exceed o(n logn).

2139

What are memory tables?

1094

Can a final method be overloaded?

942

What are java annotations?

1153

How to connect to a remote database using Applet?

2538

What is the ==?

880

what are Hostile Applets?

2075

What is a wrapper method?

1093

What is methods and methodology?

1023

what is function overloading in java?

1292

What is a class in java?

1006

Is alive method in java?

971

What is a nested structure?

1031

What is a static method in java?

1045

What is jvm? Why is java called the platform independent programming language?

1017

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