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Core Java Interview Questions
Questions Answers Views Company eMail

Does 'true' and 'false' are keywords?

5 9024

As a developer what steps do you take to improve the performance?

4 7935

Can Applet have constructors?

Infosys,

5 27755

Can an exception be rethrown?

Wipro,

4 14208

Can try statements be nested?

Wipro,

3 9200

Can we access a database using applets?

Hewitt,

2 7733

Can you extend more than one interface?

9 23570

Can you have a constructor in abstract class?

HCL,

18 53986

Can you have an inner class inside a method and what variables can you access?

2 8577

Can you run the product development on all operating systems ?

1 6527

what are Checked & Unchecked exceptions ?

2 8039

What will happens if you opened Internet Explorer 4 times?

2 5957

What is the default modifier in Interface?

5 14616

Define Compiling?

3 6901

Difference between canvas class & graphics class?

1 9443


Post New Core Java Questions

Un-Answered Questions { Core Java }

How do you test a method for an exception using junit?

1210


When do you get classcastexception?

1031


What is assembly used for?

1021


What is the properties class?

1092


Draw a UML class diagram for the code fragment given below: public class StringApplet extends Applet { private Label sampleString; private Button showTheString; private ButtonHandler bHandler; private FlowLayout layout; public StringApplet() { sampleString = new Label(" "); showTheString = new Button (" Show the String"); bHandler = new ButtonHandler(); layout = new FlowLayout(); showTheString.addActionListener(bHandler); setLayout(layout); add(sampleString); add(showTheString); } class ButtonHandler implements ActionListener { public void actionPerformed(ActionEvent e) { samplestring.setText("Good Morning"); } } } Note: The methods need not be indicated on the diagram.

2054


What do you understand by the term polymorphism?

1081


Why is singleton class used?

1036


What are passing parameters?

1089


What is difference between an object and a class?

1126


Can a final method be overloaded?

944


Can a class be private?

962


Is it possible to instantiate the abstract class?

956


What is byte [] in java?

1016


Why collection doesn’t extend cloneable and serializable interfaces?

1104


whar are the draw backs of programming lang step by step in Clang and next in C++ and next and in Java nad in .Net

2105