We Want to Create a Class That Represents a Geometric

question 24

Multiple Choice

We want to create a class that represents a geometric sequence.A geometric sequence is a sequence of numbers that begin at some value and then multiplies each value by some constant to get the next value.For example, the geometric sequence 1, 2, 4, 8, 16 starts at 1 and multiplies each term by 2 to get the next.The geometric sequence 10.8, 5.4, 2.7, 1.35 starts at 10.8 and multiplies each term by 0.5 to get the next.The basic framework of a geometric sequence class is below: public class Geometricsequence
{
private double currentvalue;
private double multiplier;
}
We want to create a geometric sequence using code like:
Geometricsequence first = new Geometricsequence (1,2) ;
// Creates 1, 2, 4, 8, 16...
Geometricsequence second = new Geometricsequence (10.8,0.5) ;
/ / Creates 10.8,5.4,2.7,1.35 ...
We want to produce elements of the geometric sequence using code code like:
System.out.println (first.next() ) ; // Prints 1 and advances
System.out.println (first.next() ) ; // Prints 2 and advances
System.out.println (first.next() ) ; // Prints 4 and advances
System.out.println (first.next() ) ; // Prints 8 and advances
System.out.println (second.next() ) ; //Prints 10.8 and advances
System.out.println (second.next() ) ; //Prints 5.4 and advances
System.out.println (second.next() ) ; //Prints 2.7 and advances
What should the body of the next method be?

• A) double result = currentValue;
• currentvalue = currentValue * multiplier;
• return result;
• B) return currentValue;
• currentValue = currentValue * multiplier;
• C) double result = currentValue;
• multiplier = currentValue * multiplier;
• return result;
• D) currentValue = currentValue * multiplier;
• return currentValue;

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Definitions:

Generic Class

A class in programming that is parameterized over types, allowing it to be used with various data types without modifying its source code.

Instantiate

The process of creating an instance of a class in object-oriented programming.

Resize

The process of changing the size of a data structure or graphical element, adjusting it to accommodate more elements or fit better in a UI.

ArrayList Class

A resizable array implementation in the Java programming language that allows for dynamic arrays of objects.