1. Fill in the blanks in each of the following statements: a) If a class contains at least one abstract method, it’s a(n) ____________class. b) Classes from which objects can be instantiated are called ____________ classes. c) ___________ involves using a superclass variable to invoke methods on superclass and sub-class objects, enabling you to “program in the general.” d) Methods that are not interface methods and that do not provide implementations must be declared using keyword ______________.
OOPs
In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.
Constructor
The easiest way to think of a constructor in object-oriented programming (OOP) languages is:
1. Fill in the blanks in each of the following statements:
a) If a class contains at least one abstract method, it’s a(n)
____________class.
b) Classes from which objects can be instantiated are called ____________
classes.
c) ___________ involves using a superclass variable to invoke methods on
superclass and sub-class objects, enabling you to “program in the general.”
d) Methods that are not interface methods and that do not provide
implementations must be declared using keyword ______________.
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