What's the main difference between arraylist / hashmap and vector / hashtable?
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Can you think of some nice examples where *multiple* actors are associated with a use case ?
What are all the operators that cannot be overloaded?
Can an interface implement or extend another interface?
What is the use if instanceof keyword? And how do refer to a current instance of object?
What is inheritance in java?
Explain about message passing in object oriented programming?
If there is a conflict between base class method definition and interface default method definition, which definition is picked?
What is sealed modifiers?
what are the different ways for a method to be overloaded?
Difference: Object Oriented Analysis (OOA) and Object Oriented Design (OOD)?
Why is planning too much up front a mistake in an OOSAD project?
Which OOPS concept exposes only the necessary information to the calling functions?