Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
11th Edition
ISBN: 9780134670942
Author: Y. Daniel Liang
Publisher: PEARSON
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Chapter 13.8, Problem 13.8.2CP

Explanation of Solution

Abstract class:

An abstract class is a class which may or may not include abstract methods and cannot be instantiated but rather can be sub classed.

Legal abstract class:

The conditions for a class to be considered as legal abstract class are mentioned below:

  • If a class includes abstract methods, then the class must be declared as abstract.
  • The abstract method that is declared within the abstract class must be declared without braces and followed by a semicolon.

Interface:

Interface is a reference type in Java, which contains a collection of abstract methods.

An interface needs to the follow certain conditions such as:

  • One cannot instantiate an interface.
  • Interfaces do not contain any constructors.
  • All methods present in the interface are abstracts.
  • An interface does not contain any instance field.
  • An interface cannot be extended by a class.

Similarities between abstract classes and interfaces:

Some of the similarities between abstract classes and interfaces are mentioned below:

  • One cannot create objects for both abstract classes and interfaces.
  • All the abstract methods must be overridden by the sub class in both interfaces and interfaces.
  • One can create reference variables for both abstract classes and interfaces...

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Objective: The objective of this assignment is to gain practice with pen testing a live web application running on a remote server. The live web application is a known vulnerable web application called DVWA (Damn Vulnerable Web Application) with security settings set to low. The web app is running on an AWS EC2 (Elastic Compute Cloud) instance running Ubuntu 22. Note: The point of this assignment is to step it up a notch, we learnt about different web application vulnerabilities and applied that knowledge, now we are going to pen test and enumerable the vulnerabilities of a web app + the underlying infrastructure it is running on. Before you begin please find out what your IP address is and place it in this sheet so that I can track who is doing what: IP Addresses.docx . Tasks: 1- Start by connecting to the target, I did not install a TLS certificate on purpose that is why you are going to connect via http and not via https: http://3.99.221.134/dvwa/login.php 2- Broken Authentication:…
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Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)

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