Fill in the blanks A child interface can inherit from parent interface(s) and override or revise the implementation of the methods defined in the parent interface(s). (Write the answers not the letters of the answers.) a) only 1 b) multiple c) zero d) can e) cannot f) normal g) abstract

Fill in the blanks A child interface can inherit from parent interface(s) and override or revise the implementation of the methods defined in the parent interface(s). (Write the answers not the letters of the answers.) a) only 1 b) multiple c) zero d) can e) cannot f) normal g) abstract

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Define a Polygon interface that has methods area() and perimeter(). Then implement classes for Triangle, Quadrilateral, Pentagon, Hexagon, and Octagon, which implement this interface, with the obvious meanings for the area() and perimeter() methods. Also implement classes, IsoscelesTriangle, Equilateral- Triangle, Rectangle, and Square, which have the appropriate inheritance relationships. Finally, write a simple user interface, which allows users to create polygons of the various types, input their geometric dimensions, and then out- put their area and perimeter. For extra effort, allow users to input polygons by specifying their vertex coordinates and be able to test if two such polygons are similar ORIGINAL WORKS ONLY
- Three interfaces ForTwoD, Shape and ForThreeD- TwoD class implements ForTwoD and Shape interfaces- ThreeD class implements ForThreeD and Shape interfaces- Four subclasses to TwoD (Circle, Rectangle, Triangle and Trapezoid)- Three subclasses to ThreeD (Cube, Tetrahedron, Sphere)-Implement the Shape hierarchy as shown in the above diagram- Basically, each two-dimensional shape needs to compute itsarea and its perimeter.- Each three-dimensional shape needs to compute its area(also known as surface area) and its volume.- Try to surf the internet to look for some formulas, for example, tocompute the areas, the surface areas, and the volumes … I did that tooA more detailed UML diagram is shown as follow: (Note that the #’s beforethe instance variables and the methods’ names mean “protected”) - Enum class defines some enum constants (various colors, feel free tochange)- The main interface should be the Shape interface consists of only oneabstract method, the area method. You can put some…
Interface : - Question : Make the AECar class implement the Comparable Java interface. Write a driver program that sorts a list of 4 AECars according to price.
Design an interface Polynomial that defines the following operations. This is your polynomial abstract data type. Specifically this interface should have the following method signatures: A method addTerm that takes a coefficient and a power (both integer numbers) and adds the resulting term to the polynomial. (This will enable you to build a polynomial term-by-term.) It should throw an IllegalArgumentException if a negative power is passed to it. A method removeTerm that takes a power and removes any and all terms in the polynomial with that power. A method getDegree that returns the degree of this polynomial. A method getCoefficient that takes a power and returns the coefficient for the term with that power. A method evaluate that takes a double-precision decimal number and returns a double-precision result. A method add that takes another Polynomial object and returns the polynomial obtained by adding the two polynomials. Any implementation should ensure that this method does not…
a:) Define a Polygon interface that has methods area() and perimeter(). b:) Then implement classes for Triangle, Quadrilateral, Pentagon, Hexagon, and Octagon, which implement this interface, with the obvious meanings for the area() and perimeter() methods. c:) Implement classes, IsoscelesTriangle, Equilateral-Triangle, Rectangle, and Square, which have the appropriate inheritance relationships. d:) Write a simple user interface, which allows users to create polygons of the various types, input their geometric dimensions, and then output their area and perimeter. e:) For extra effort, allow users to input polygons by specifying their vertex coordinates and be able to test if two such polygons are similar. using all a to e parts develop a program
Fill in the blank question- Only answer needed without explanation Q. Dentry is interface between _______________.
LockADT – Show the interface and all abstract methods LockDataStructureClass – Show the following methods: default constructor, overloaded constructor, copy constructor, setX, setY, setZ, alter (change the lock’s combination to the numbers passed) turn (use for loops to show the dial turning), close (locks the lock), attempt (tries to unlock the lock – calls turn( ), inquire (locked or unlocked), current (returns the number the dial is pointing to), toString LockClientDemoClass – You should have a Lock object instantiated and a menu method that displays: 1: set lock combination 2: close lock 3: check status 4: attempt to open lock 5: check what the dial is currently pointing at 6: exit the program Example of turning the lock: First number (17): 0 39 38 37 … 0 39 38 …17 Second number (26): 17 18 19 ... 38 39 0 1 2 … 17 18 19 20 21 22 23 24 25 26 Third number (9): 26 25 24 23 …. 12 11 10 9 (go directly to the number) Demonstrate all behaviors (actions, methods) of the lock.
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Explore scenarios where you might need to implement a custom Comparator for a class that already implements the Comparable interface. Provide real-world examples for context.
Exercise: Exercises Write a class named Octagon that extends GeometricObject and implements the Comparable and Cloneable interfaces. Assume all eight sides of the octagon are of equal length. The area can be computed using the following formula: The Octagon class has a private double data field named side with its getter and setter methods. The class has a no-arg constructor that creates an Octagon with side 0, and a constructor to create an Octagon with a specified side. Write a test program that creates an Octagon object with side value 5 and displays its area and perimeter. Create a new object using the clone method, and compare the two objects using the compareTo method. As far as classes go, the abstract GeometricObject class contains the abstract doubles getArea() and getPerimeter(). The programming language used in this exercise is Java, and it covers the Interfaces topic. I did get how most of the program should look like, but I'm facing trouble understanding a few…
**Can Some one Help me with this :(** In C++ write your create your hierarchy(ies) in a library for easy re-use. Make a sample simulation application which allows the user to choose names for the predators and prey, give them ranges of values for speed, birth rate, hunger, and food worth -- all wolves are equally fast or hungry and all rabbits aren't equally fast and food-worthy. Randomly create creatures to fill your population. Then simulate their interaction: do each creature gets a chance to 'spawn' then predators attack (a random prey) and prey flees (when attacked) if the attack succeeds, the predator 'eats' the prey remove those who have died of starvation and/or being eaten report the counts of predators and prey left repeat until _______? Common stopping conditions are the user tells you how many 'generations' to do, everything is dead, everything from either predator or prey is dead, or the system seems to be stable (the count of both populations over the past n generations…
Please use java 8 and JavaDoc: - Create a generic interface. Create an abstract class that implements the generic interface. Show strong type checking and code reuse.