Answer / Raja Singh

The main topics in Core Java include Object-Oriented Programming (OOPS), Java Syntax, Data Types, Variables and Operators, Control Structures, Arrays, Exception Handling, File Handling, Interfaces, Inheritance, Polymorphism, Abstract Classes, and Collections.

Can you write a java class that could be used both as an applet as well as an application?

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What is the difference between yield() and sleep()?

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Is null in java?

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Can main() method in java can return any data?

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What is anagram of a string?

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Can you pass by reference in java?

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is it mandatory to deaclare all variables public static fianl in interfaces?if i declare like in the below program, public interface A { public static final int I=0; int j=0; } in interface A,what is the difference between I,j?

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Is java developer a good career?

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Explain thread life cycle in java?

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Define Compiling?

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How can we make copy of a java object?

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What is package private scope in java?

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