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,

2015

why an outer class cannot be declared as private?

1 3620

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

3 4899

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

Nokia,

8 30409

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

TCS,

2 4317

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

IBM, TCS,

3 7289

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

HCL,

3 7567

Static Variable can referred in non-static method?

3 4249

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 4563

Why transient variables wont participate in serialization?

2 5133

what is ststic with example

Wipro,

1599

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

Accenture,

1 10770

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

ITC Infotech,

4 6165

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 9902

how to identify duplicate values in arraylist

TCS,

2 4423

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Un-Answered Questions { Core Java }

What does this mean java?

561

make a method which any number and any type of argument and print sum of that arguments.....

1386

Does list maintain insertion order java?

541

Who found java?

553

What is hashmap in java?

573

How to find the index of the largest number in an arraylist java?

522

What is navigable map in java?

527

What is int argc char * argv?

569

What is static data type in java?

546

What is method in research paper?

577

what is thread? What are the high-level thread states? : Java thread

794

Explain the transient field modifier?

569

What is the difference between abstraction and encapsulation?

565

How do you take thread dump in java?

562

What are the main differences between the java platform and other platforms?

533

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