why map is not part of collection interface in Java
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How to create deadlock in your code.
class A{ p s v test(){sout("A");} } class B extends A{ p s v test(){sout("B");} } class C{ main(){ A a2 = new B(); } } what is the o/p? what this example refers to? what happens when you try to override a static method from parent class?
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What's the four principles of OOP?
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