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?

991

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

1215

What is the purpose of void class?

1077

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

Cyient,

1020

How to add menushortcut to menu item?

1019

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

1054

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

1116

Can constructor be inherited?

1054

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

1028

What is the relationship between clipping and repainting under awt?

1163

What is are packages?

1049

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

1029

What is externalizable interface?

1116

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

1097

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

1227

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Un-Answered Questions { Core Java }

How to sort elements in a parallel array in java?

911

Can a serialized object be transferred via network?

973

What is the difference between this() and super() in java?

1062

What is n in java?

966

What is output buffer?

1065

How many techniques can be employed to create a string object?

1126

How to invoke external process in java.

1094

Are generics important java?

1003

Can an interface have a constructor?

991

How to sort numbers in java without array?

1003

What is multithreading in java?

1064

What does 3 dots mean in java?

1002

Define locale.

1047

What differences exist between iterator and listiterator?

1057

Name some OOPS Concepts in Java?

1090

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