Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

write a program that list all permutations of ABCDEF in which A appears before B?

Nissan,

2446

why an outer class cannot be declared as private?

1 4242

What is abstraction with strong example program? (not a general program)

3 6384

Why Java is called as purely platform independent..? Explain briefly..dont Give regular answers Explain with your own example..?

Nokia,

8 32632

Can any one say how will sort map objects in java?

TCS,

2 5090

How can u create the Object of class Without using "New" opertor?

IBM, TCS,

3 8372

How can two threads be made to communicate with each other?

HCL,

3 8795

Static Variable can referred in non-static method?

3 5368

when we create singleton design then we create private constructtor..so how JVM take private constructor to make object..but it's private..

Ness Technologies,

1 5620

Why transient variables wont participate in serialization?

2 6176

what is ststic with example

Wipro,

2017

what is purpose of collections.unmodified() method..?

Accenture,

1 11352

what is purpose of writting public static void main(Strind arg[]) in java..?

ITC Infotech,

4 7350

What is the code inside the public void actionPerformed(ActionEvent ae) override method in Applet [ Condition:- you have one TextField and One Button , you have to enter any color name inside the TextField, when you click on Button Your background will change according to your input color name]

IBM,

2 10815

how to identify duplicate values in arraylist

TCS,

2 5408

Post New Core Java Questions

Un-Answered Questions { Core Java }

What is the difference between JDBC 1.0 and JDBC 2.0?

3138

What is data type modifier?

894

What is the difference between a break statement and a continue statement?

998

Differece between class and generic class?

991

Explain wait() method of object class ?

1155

What is instance example?

927

Explain about object oriented programming and its features?

982

What are the benefits of operations?

912

What about main thread in java?

1079

Name few java 8 annotations ?

985

What are the 8 primitive data types in java?

985

What is the exact difference in between Unicast and Multicast object? Where will it be used?

1017

What is Major and importance difference between for and foreach loop ?

1098

What is a boolean in java?

1018

What is static import in java?

957

For More Un-Answered { Core Java } Questions Click Here