Book Image

CompTIA PenTest+ Study Guide

By : Mike Chapple, David Seidl
Book Image

CompTIA PenTest+ Study Guide

By: Mike Chapple, David Seidl

Overview of this book

The CompTIA PenTest+ Study Guide: Exam PT0-001 offers comprehensive preparation for the newest intermediate cybersecurity certification exam. With expert coverage of Exam PT0-001 objectives, this book is your ideal companion throughout all stages of study; whether you’re just embarking on your certification journey or finalizing preparations for the big day, this invaluable resource helps you solidify your understanding of essential skills and concepts. The book shows how to perform security assessments on desktops, mobile devices, cloud, IoT, as well as industrial and embedded systems. You'll learn how to identify security weaknesses and manage system vulnerabilities. As you progress, you'll learn methods to ensure that existing cybersecurity practices, configurations, and policies conform with current best practices. You'll assess your knowledge by simulating cyber attacks to pinpoint security weaknesses in operating systems, networks, and applications. By the end of the book, you'll have all the resources you need to prepare for the exam - identify what you already know, learn what you don’t know, and face the exam with full confidence.
Table of Contents (21 chapters)
Free Chapter
About the Authors
Assessment Test
Answers to Assessment Test
End User License Agreement

Variables, Arrays, and Substitutions

Variables are one of the core concepts in any scripting language. They allow developers to store information in memory using a descriptive name and then later reference that information in their script. Variables can store integers, decimal numbers, Boolean (true/false) values, dates and times, character strings, and virtually any other type of information that you might need.

Let’s take a look at how we might use a variable in some pseudocode. Imagine that we have a small store that normally sells cupcakes for $2 but offers a 50 percent discount on Tuesdays. We might need a script that calculates Tuesday’s price, like this one:

cupcake_price = 2
cupcake_price = cupcake_price / 2
print "The price of a cupcake is ", cupcake_price

In this script, cupcake_price is a variable. The first line of the script sets the value of that variable equal to 2.00. The next line changes the price to one-half of its current value...