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 use cases?

986

Can a constructor have different name than a class name in java?

1207

What is the purpose of void class?

1068

What is the difference between an interface and an abstract class?

Cyient,

1014

How to add menushortcut to menu item?

1010

Can you call one constructor from another if a class has multiple constructors?

1045

What is a singleton class? Give a practical example of its usage.

1112

Can constructor be inherited?

1047

Can a class declared as private be accessed outside it’s package?

1022

What is the relationship between clipping and repainting under awt?

1152

What is are packages?

1044

I want to re-reach and use an object once it has been garbage collected. Define how it’s possible?

1018

What is externalizable interface?

1112

What is the difference between reader/writer and inputstream/output stream?

1093

Define how can we find the actual size of an object on the heap?

1218

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Un-Answered Questions { Core Java }

Difference between overriding and overloading in java?

1079

Is zero a natural number?

1045

Which data type is class in java?

1023

Write a java program to count the number of words present in a string?

991

You're given a Boolean 2D matrix, can you find the number of islands?

1116

What is the difference between state-based unit testing and interaction-based unit testing?

944

Why can't we override private static methods?

980

What is logical variable?

991

What is meant by tab pans?

1258

Is final static java?

1022

What carriage return means?

973

What is t in parametric equations?

998

What does those terms actually mean included in the j.d.k i.6?

2128

What does java stand for?

1138

Why java applets are more useful for intranets as compared to internet?

1086

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