Answer:
Answered below
Explanation:
//Program is written in Python programming //language.
number_of_trees = int(input ("Enter number of trees purchased: "))
height_of_trees = float(input("Enter height of trees: "))
delivery_status = input("Do you want trees delivered? enter yes or no ")
price_of_two_meters = 20
total_price = number_of_trees * price_of_two_meters
//Invoice
print (number_of_trees)
print(height_of_trees)
print (total_price)
print (delivery_status)
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Answer:
(c) the dynamic type of reference will determine which of the methods to call.
Explanation:
Polymorphism in Object Oriented Programming typically means the same method name can cause different actions depending on which object it is invoked on. Polymorphism allows for dynamic binding in that method invocation is not bound to the method definition until the program executes.
So in the case of Animal superclass and Mammal subclass, both having a method called eat() with identical signatures and return types, depending on which reference, the correct method eat() will be called dynamically upon execution.
For example, if we have the following;
================================
<em>Mammal mammal = new Animal();</em>
<em>mammal.eat()</em>
================================
The eat() method that will be called is the one in the Mammal subclass.
However, if we have;
================================
<em>Animal animal = new Animal();</em>
<em>animal.eat()</em>
================================
The eat() method of the Animal superclass will be called.
There is no "best" programming language. Each programming language has it's one purpose. HTML is used for the skeleton of the web page. CSS is used to style the HTML. Javascript and javascript libraries like jQuery are used to make a web page more interactive. PHP is used to make a web page dynamic. MYSQL used to manage databases. Not all languages are for strictly for web page development. Ruby is an example. But Ruby on Rails is for web development. Some languages are used for making programs. Such as C, C++, C#. There are all sorts of programming languages. Some more popular than others. I have learned multiple programming languages and I have my favorites. If you go to learn multiple languages, I am pretty sure you're gonna have a favorite.
It basically comes down to what programming language you want to learn.
