The interface concept is Java's way of implementing __________ inheritance.
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Q51: Typically, an abstract class is a class
Q52: Usually, an abstract class contains at least
Q53: We can instantiate an object from an
Q54: If a class has an abstract method,
Q55: Abstract methods can be called.
Q56: Inheritance helps organize related classes into _.
Q57: An abstract class is declared to be
Q59: Because the private instance variables of a
Q60: Suppose you write a program in which
Q61: You have written a SavingsAccount class based
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