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Core Java Interview Questions
Questions Answers Views Company eMail

What is inner class?what is the use of inner class?where we create the object for inner class? and inner class can extend any class or inner class can implement any interface?

Wipro,

1 1354

Q) I have a ArrayList object, in that object i have added 5 integer values, 5 float values, 5 string values. Now question is how can delete particular type of data ( i.e all int values or all float values or string values) in that list object at a time?

Aricent,

3 6259

I have a Arraylist object, it has duplecate values also. Now question is i want delete duplecate data in that objet with out using Set?

Aricent,

8 10681

What are the similarities between an array and an ArrayList?

3 7570

Hai friends I am MCA 2006 passout. Spend time in 1 yr for teacing and 5 months in small s/w firm. worked in 4 or 5 months in few places. Presently I am writing bank exams. I want to get back to IT sector. Are there any possibilities. any growth prospects?. I am having some knowledge in core and advanced java. I am so desperate. Any suggestions thanks in advance. u can write to my mail mahidestiny@gmail.com

4 2836

how many ways we can serialize the java object?

Satyam,

2 9821

how many ways to create Thread and which one is good? runnable interface ot Thread class?

Satyam,

3 8828

what is difference between set and list in collection?

Satyam,

3 9746

What do u mean by method and also contructer in java ?

3 3316

what is main purpose of interface?

Accenture, HCL, NIIT,

2 12072

what is main purpose of abstract class?

7 9470

what is difference between abstract factory and factory design patterns?

1466

what is template design pattern?

1565

write a class to input 2 points by the user & check the line maked by the points is horizontal,vertical or rectangle?

1 1668

What are the ways of polymorphism other than Overridding & Overloading

1 4619


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Un-Answered Questions { Core Java }

What are three types of loops in java?

159


What is the base class of all exception classes?

146


What is the simpletimezone class in java programming?

138


How do you remove duplicates from an array in java?

99


What is the purpose of skeleton and stub?

160






Can a serialized object be transferred via network?

142


What does super keyword do?

193


Is age discrete or continuous?

105


What is fail first in java?

104


What is an immutable class?

146


What is the use of a conditional inclusion statement in Java ?

158


Why scanner is used in java?

109


What do you mean by light weight and heavy weight components?

162


What is primitive array?

127


Can a constructor be protected?

113