Multiple-Choice Question (MCQ)
Question with several options, choose the best one(s).
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Free knowledge base
CompTIA Tech+ (FC0-U71) — key terms, tricks & tips
Everything from the course in one searchable place: 332 entries. Use it to review before a practice test or look up a word you forgot.
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Performance-Based Question (PBQ)
Interactive questions simulating real-world IT tasks.
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Scaled Score
Raw score adjusted for question difficulty.
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Exam Domain
Major subject area covered by the certification exam.
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Exam Objectives
Official list of topics and skills tested on the exam.
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Time Management
Strategically allocating time to answer all questions.
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Understanding the Tech+ FC0-U71 Exam Format
75 questions, 60 minutes, 650 to pass. Think '7-5-6-0-6-5-0' – like a phone number for success!
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Understanding the Tech+ FC0-U71 Exam Format
The CompTIA Tech+ FC0-U71 exam has a maximum of 75 questions and a 60-minute time limit. The passing score is 650 on a scale of 100-900. Remember these exact numbers.
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Understanding the Tech+ FC0-U71 Exam Format
Spending too much time on a single difficult question, especially a PBQ, early in the exam.
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Understanding the Tech+ FC0-U71 Exam Format
Not attempting all questions because there is no penalty for incorrect guesses.
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Understanding the Tech+ FC0-U71 Exam Format
Failing to read question instructions carefully, especially for multiple-choice questions that require selecting more than one answer.
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Active Learning
Engaging with material through summarizing, teaching, or problem-solving.
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Practice Exam
A simulated test to familiarize with format and identify weak areas.
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Test Anxiety
Psychological distress experienced before or during an examination.
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Performance-Based Questions
Exam questions requiring hands-on tasks or simulations.
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Cramming
Intensive, last-minute study, often ineffective for long-term retention.
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Study Strategies and Exam Day Tips
To remember exam day success, think 'PACE': P-repared, A-rrive early, C-alm, E-liminate options.
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Study Strategies and Exam Day Tips
The CompTIA Tech+ FC0-U71 exam is scored on a scale of 100-900, with a passing score of 675. Knowing this range helps set realistic expectations.
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Study Strategies and Exam Day Tips
Only passively reading study materials without active recall or practice.
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Study Strategies and Exam Day Tips
Ignoring practice exams or not analyzing incorrect answers thoroughly.
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Study Strategies and Exam Day Tips
Cramming the night before the exam instead of getting adequate rest.
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Decimal
Base 10 number system using digits 0-9.
IT Concepts and Terminology
Binary
Base 2 number system using digits 0 and 1, fundamental for computers.
IT Concepts and Terminology
Hexadecimal
Base 16 number system using 0-9 and A-F, used as binary shorthand.
IT Concepts and Terminology
Bit
A single binary digit (0 or 1), the smallest unit of data.
IT Concepts and Terminology
Nibble
A group of four binary bits, equivalent to one hexadecimal digit.
IT Concepts and Terminology
Byte
A group of eight binary bits, commonly used to represent a character.
IT Concepts and Terminology
Base
The number of unique digits or symbols in a number system.
IT Concepts and Terminology
Number Systems: Binary, Hex, and Decimal
Binary is 'B' for 'Bits' (0s and 1s). Decimal is 'D' for 'Daily' (what we use). Hex is 'H' for 'Huge' (16 symbols, good for big numbers).
IT Concepts and Terminology
Number Systems: Binary, Hex, and Decimal
The exam expects you to perform basic conversions between binary, decimal, and hexadecimal. Pay close attention to how each system is represented (e.g., '0x' for hex) and their common IT uses like MAC addresses (hex) and IP addresses (decimal for IPv4, hex for IPv6).
IT Concepts and Terminology
Number Systems: Binary, Hex, and Decimal
Confusing the values of hexadecimal letters (A=10, F=15).
IT Concepts and Terminology
Number Systems: Binary, Hex, and Decimal
Incorrectly grouping binary digits when converting to/from hexadecimal (always group in fours from the right).
IT Concepts and Terminology
Number Systems: Binary, Hex, and Decimal
Forgetting that the rightmost digit in any number system represents the base to the power of zero (e.g., 2^0, 10^0, 16^0).
IT Concepts and Terminology
Kilobyte (KB)
Approximately 1000 bytes, used for small file sizes.
IT Concepts and Terminology
Megabyte (MB)
Approximately 1000 kilobytes, common for photos or documents.
IT Concepts and Terminology
Gigabyte (GB)
Approximately 1000 megabytes, common for RAM or hard drives.
IT Concepts and Terminology
Terabyte (TB)
Approximately 1000 gigabytes, used for large storage capacities.
IT Concepts and Terminology
Mbps
Megabits per second, a common unit for measuring data transfer speed.
IT Concepts and Terminology
Units of Measure: Storage and Speed
Big Bytes for Big Storage, little bits for little speed (or 'b' for bits, 'B' for Bytes).
IT Concepts and Terminology
Units of Measure: Storage and Speed
The exam often tests the distinction between bits (b) for speed and bytes (B) for storage. Memorize the hierarchy of units (Kilo, Mega, Giga, Tera) and their approximate values.
IT Concepts and Terminology
Units of Measure: Storage and Speed
Confusing bits (b) with bytes (B) when discussing speed vs. storage.
IT Concepts and Terminology
Units of Measure: Storage and Speed
Underestimating the difference in scale between units (e.g., thinking MB and GB are similar).
IT Concepts and Terminology
Units of Measure: Storage and Speed
Forgetting that network speeds are almost always in bits per second (bps).
IT Concepts and Terminology
Troubleshooting
A systematic process of diagnosing and resolving problems in a system.
IT Concepts and Terminology
Methodology
A set of procedures or principles used to solve a problem or achieve an objective.
IT Concepts and Terminology
Theory of Probable Cause
An educated guess about the root cause of an issue, based on gathered information.
IT Concepts and Terminology
Verification
Confirming that a problem has been fully resolved and no new issues exist.
IT Concepts and Terminology
Documentation
Recording problem details, troubleshooting steps, and solutions for future reference.
IT Concepts and Terminology
Root Cause
The fundamental reason a problem occurred, not just the symptom.
IT Concepts and Terminology
Troubleshooting Methodology Step by Step
I.T.I.V.D. – I Think I'll Verify Documentation. (Identify, Test, Implement, Verify, Document)
IT Concepts and Terminology
Troubleshooting Methodology Step by Step
The CompTIA Tech+ exam expects you to know the exact 5 steps of the troubleshooting methodology in order. Pay close attention to the order: Identify, Establish/Test Theory, Implement, Verify, Document.
IT Concepts and Terminology
Troubleshooting Methodology Step by Step
Jumping to conclusions without gathering enough information.
IT Concepts and Terminology
Troubleshooting Methodology Step by Step
Not verifying the solution fully, leading to recurring issues.
IT Concepts and Terminology
Troubleshooting Methodology Step by Step
Failing to document steps, making future troubleshooting harder.
IT Concepts and Terminology
Data
Raw, unorganized facts, figures, or symbols without inherent meaning.
IT Concepts and Terminology
Information
Processed, organized, and structured data that provides meaning and context.
IT Concepts and Terminology
Processing
The act of transforming raw data into meaningful information.
IT Concepts and Terminology
Accuracy
A characteristic of information meaning it is free from errors and reliable.
IT Concepts and Terminology
Relevance
A characteristic of information meaning it is directly applicable to the task.
IT Concepts and Terminology
Timeliness
A characteristic of information meaning it is available when needed.
IT Concepts and Terminology
Completeness
A characteristic of information meaning it contains all necessary details.
IT Concepts and Terminology
Cost-effectiveness
A characteristic meaning the value of information outweighs its acquisition cost.
IT Concepts and Terminology
Computing Basics: Data, Info, and Value
To remember the characteristics of valuable information, think 'ART CC': Accurate, Relevant, Timely, Complete, Cost-effective.
IT Concepts and Terminology
Computing Basics: Data, Info, and Value
The exam often tests your ability to distinguish between data and information. Look for keywords like 'raw facts' for data and 'processed,' 'meaningful,' or 'context' for information. Memorize the characteristics of valuable information.
IT Concepts and Terminology
Computing Basics: Data, Info, and Value
Confusing raw data with information that has already been processed and given context.
IT Concepts and Terminology
Computing Basics: Data, Info, and Value
Underestimating the importance of processing steps in converting data into useful information.
IT Concepts and Terminology
Computing Basics: Data, Info, and Value
Forgetting that information's value depends on its quality characteristics like accuracy and timeliness.
IT Concepts and Terminology
Motherboard
Main circuit board connecting all computer components.
Infrastructure
CPU
Central Processing Unit; the 'brain' executing instructions.
Infrastructure
RAM
Random Access Memory; volatile short-term data storage.
Infrastructure
PCIe
PCI Express; high-speed expansion slot for components.
Infrastructure
Chipset
Integrated circuits managing data flow on the motherboard.
Infrastructure
SATA
Serial ATA; interface for connecting storage devices.
Infrastructure
M.2
Small form factor slot for NVMe SSDs and other devices.
Infrastructure
BIOS/UEFI
Firmware that initializes hardware during boot-up.
Infrastructure
Computer Components and Motherboard Basics
To remember the main components: 'My CPU Runs Perfectly So My Awesome Board is Cool'. Motherboard, CPU, RAM, PCIe, SATA, M.2, ATX (power), BIOS/UEFI, Chipset.
Infrastructure
Computer Components and Motherboard Basics
The CompTIA Tech+ exam frequently tests your ability to identify the function of major motherboard components and common expansion slots. Pay close attention to the differences between RAM (volatile) and storage (non-volatile) and the purpose of the CPU. Keywords like 'main circuit board', 'executes instructions', 'temporary data storage', and 'expansion cards' are critical.
Infrastructure
Computer Components and Motherboard Basics
Confusing RAM (temporary memory) with a hard drive/SSD (permanent storage). RAM is for active tasks, storage is for saving files.
Infrastructure
Computer Components and Motherboard Basics
Attempting to install a CPU or RAM module that is incompatible with the motherboard's socket or slot type (e.g., DDR3 RAM in a DDR4 slot).
Infrastructure
Computer Components and Motherboard Basics
Forgetting to install a CPU cooler. CPUs generate significant heat and will quickly overheat and shut down without proper cooling.
Infrastructure
Peripheral
External hardware device connected to a computer.
Infrastructure
Port
Physical interface on a computer for connecting devices.
Infrastructure
Connector
End of a cable that plugs into a port.
Infrastructure
USB
Universal Serial Bus; common interface for many peripherals.
Infrastructure
HDMI
High-Definition Multimedia Interface; for video and audio output.
Infrastructure
DisplayPort
Digital display interface for video and audio.
Infrastructure
Ethernet
Networking standard for wired local area networks.
Infrastructure
RJ-45
Connector type used for Ethernet cables.
Infrastructure
Peripherals, Ports, and Connectors
PPC: Peripherals Plug into Ports with Connectors. Remember the 'P's to keep them straight!
Infrastructure
Peripherals, Ports, and Connectors
The exam often asks you to identify port types by their appearance or function. Memorize the distinct shapes of USB-A, USB-C, HDMI, DisplayPort, and Ethernet (RJ-45) ports and their primary uses. Pay attention to USB versions (2.0, 3.0/3.2 Gen 1, USB-C) and their speed differences.
Infrastructure
Peripherals, Ports, and Connectors
Forcing a connector into an incompatible port, which can damage pins or the port itself.
Infrastructure
Peripherals, Ports, and Connectors
Assuming all USB ports are the same speed; older ports will be slower than newer ones.
Infrastructure
Peripherals, Ports, and Connectors
Not checking both ends of a cable when troubleshooting connectivity issues.
Infrastructure
HDD
Hard Disk Drive; magnetic storage with spinning platters.
Infrastructure
SSD
Solid State Drive; flash memory-based storage, no moving parts.
Infrastructure
NVMe
Non-Volatile Memory Express; high-speed protocol for SSDs over PCIe.
Infrastructure
Internal Storage Devices and Interfaces
H-S-N: 'How Slow Now?' helps remember the speed progression: HDD (Slow), SATA SSD (Faster), NVMe SSD (Now Fastest!).
Infrastructure
Internal Storage Devices and Interfaces
Memorize the key differences: HDDs are slow/cheap/high-capacity, SSDs are fast/durable/medium-cost, NVMe SSDs are fastest/expensive/M.2 or PCIe. Know that SATA is for HDDs and many SSDs, while NVMe uses PCIe for maximum speed.
Infrastructure
Internal Storage Devices and Interfaces
Confusing M.2 as a protocol rather than a form factor; M.2 can be SATA or NVMe.
Infrastructure
Internal Storage Devices and Interfaces
Assuming all SSDs are NVMe; many SSDs still use the SATA interface.
Infrastructure
Internal Storage Devices and Interfaces
Underestimating the performance difference between an HDD and even a basic SATA SSD.
Infrastructure
Wi-Fi
Wireless technology for connecting devices to a network using radio waves.
Infrastructure
IP Address
Unique numerical label identifying a device on a network.
Infrastructure
DNS
Translates human-readable domain names into numerical IP addresses.
Infrastructure
Router
Device that forwards data packets between computer networks.
Infrastructure
SSID
The name of a Wi-Fi network, visible to users.
Infrastructure
DHCP
Automatically assigns IP addresses to devices on a network.
Infrastructure
WPA2/WPA3
Security protocols that encrypt data on Wi-Fi networks.
Infrastructure
Networking Basics: Wi-Fi, IP, DNS, and Routers
To remember the core network services: 'DIRT' - DNS, IP, Router, Wi-Fi Technology.
Infrastructure
Networking Basics: Wi-Fi, IP, DNS, and Routers
For the CompTIA Tech+ exam, memorize the primary function of each component: Wi-Fi for wireless access, IP for device identification, DNS for name resolution, and Routers for network interconnection. Be able to differentiate between IPv4 and IPv6 and understand the role of DHCP in IP assignment.
Infrastructure
Networking Basics: Wi-Fi, IP, DNS, and Routers
Confusing a modem with a router: A modem connects to the ISP; a router creates and manages the local network.
Infrastructure
Networking Basics: Wi-Fi, IP, DNS, and Routers
Assuming 'no internet' means the Wi-Fi is down: Wi-Fi can be working, but the internet connection (or DNS) might be broken.
Infrastructure
Networking Basics: Wi-Fi, IP, DNS, and Routers
Ignoring the difference between 2.4 GHz and 5 GHz Wi-Fi bands for troubleshooting: Each has distinct characteristics affecting performance.
Infrastructure
Cloud Computing
On-demand delivery of IT resources over the internet.
Infrastructure
Virtualization
Creating a virtual version of a resource, like a server or OS.
Infrastructure
Hypervisor
Software that creates and runs virtual machines (VMs).
Infrastructure
SaaS
Software as a Service; ready-to-use applications over the internet.
Infrastructure
IaaS
Infrastructure as a Service; virtualized computing resources.
Infrastructure
PaaS
Platform as a Service; platform for developing and running apps.
Infrastructure
Public Cloud
Cloud services offered over the public internet by a third party.
Infrastructure
Hybrid Cloud
Combines public and private cloud environments.
Infrastructure
Cloud, Virtualization, and Mobile Devices
To remember cloud service models: 'I P S' - Infrastructure, Platform, Software. Think of it as a spectrum of how much 'stuff' the cloud provider handles for you.
Infrastructure
Cloud, Virtualization, and Mobile Devices
The exam often asks you to differentiate between IaaS, PaaS, and SaaS. Remember the level of management you retain: IaaS (you manage OS up), PaaS (you manage app/data), SaaS (you just use the app). Also, know the benefits of virtualization like resource optimization and cost savings.
Infrastructure
Cloud, Virtualization, and Mobile Devices
Confusing IaaS, PaaS, and SaaS by misidentifying who manages what components.
Infrastructure
Cloud, Virtualization, and Mobile Devices
Underestimating the importance of virtualization as the underlying technology for cloud computing.
Infrastructure
Cloud, Virtualization, and Mobile Devices
Forgetting the key characteristics of cloud computing (e.g., rapid elasticity, measured service).
Infrastructure
Operating System (OS)
Software managing hardware/software resources and providing services.
Applications and Software
Kernel
Core component of an OS, directly interacts with hardware.
Applications and Software
Process Management
OS function allocating resources to running programs.
Applications and Software
Memory Management
OS function handling how programs use RAM.
Applications and Software
Device Driver
Software enabling OS to communicate with hardware.
Applications and Software
Graphical User Interface (GUI)
Visual way for users to interact with an OS.
Applications and Software
Multitasking
Ability of an OS to run multiple programs concurrently.
Applications and Software
Operating Systems and Their Roles
Remember 'P.M.F.D.' for the core OS functions: Process, Memory, File, Device management.
Applications and Software
Operating Systems and Their Roles
The CompTIA Tech+ exam expects you to know the fundamental roles of an OS and differentiate between common desktop (Windows, macOS, Linux) and mobile (Android, iOS) operating systems. Pay attention to terms like 'kernel' and 'resource management'.
Applications and Software
Operating Systems and Their Roles
Confusing an application (like a web browser) with the operating system itself.
Applications and Software
Operating Systems and Their Roles
Underestimating the kernel's critical role, thinking it's just another part of the OS.
Applications and Software
Operating Systems and Their Roles
Not understanding that different devices (desktops, phones, servers) often use different types of OS tailored to their needs.
Applications and Software
File System
Method OS uses to organize and manage files on storage.
Applications and Software
NTFS
Primary file system for Windows, supports large files and security.
Applications and Software
FAT32
Older file system, highly compatible, but limited file/partition size.
Applications and Software
exFAT
Modern FAT version for flash drives, large files, good compatibility.
Applications and Software
APFS
Apple File System, optimized for macOS SSDs, with snapshots.
Applications and Software
Ext4
Default file system for many Linux distributions, robust and reliable.
Applications and Software
File Permissions
Controls who can read, write, or execute files/folders.
Applications and Software
Journaling
Feature that helps file systems recover from system crashes.
Applications and Software
File Systems and File Management
To remember common file systems: 'Nasty Fat Elephants Always Have Extra Fun' (NTFS, FAT32, exFAT, APFS, HFS+, Ext4, XFS).
Applications and Software
File Systems and File Management
Memorize the key characteristics and limitations of FAT32, exFAT, and NTFS, especially their maximum file and partition sizes, and OS compatibility. The exam often presents scenarios where you need to choose the best file system for a given task.
Applications and Software
File Systems and File Management
Forgetting to back up critical data before performing file system operations or formatting drives.
Applications and Software
File Systems and File Management
Ignoring file permissions, leading to security vulnerabilities or access issues for users.
Applications and Software
File Systems and File Management
Using an incompatible file system for a storage device, resulting in data transfer failures or device not being recognized.
Applications and Software
Native Application
Software built for a specific OS/device.
Applications and Software
Web Application
Software accessed via a web browser.
Applications and Software
Perpetual License
One-time payment for indefinite software use.
Applications and Software
Subscription License
Recurring payments for software access.
Applications and Software
Open-Source Software
Software with freely available source code.
Applications and Software
Web Browser
Application for accessing and viewing websites.
Applications and Software
Browser Plugin
Module extending web browser functionality.
Applications and Software
Application Types and Delivery Methods
NATIVE apps are 'NAiled' to one OS. WEB apps 'Wander' across browsers. HYBRID apps 'HYbridize' both.
Applications and Software
Application Types and Delivery Methods
The exam often tests your ability to distinguish between SaaS, PaaS, and IaaS. Remember that SaaS is the most 'managed' by the vendor (you just use the app), while IaaS gives you the most control (you manage the OS and apps).
Applications and Software
Application Types and Delivery Methods
Confusing freeware with open-source software; freeware is free but not necessarily open source.
Applications and Software
Application Types and Delivery Methods
Underestimating the security risks associated with unmanaged browser plugins.
Applications and Software
Application Types and Delivery Methods
Not understanding that SaaS is a delivery model, not an application type itself (though most SaaS solutions are web apps).
Applications and Software
Open Source
Software with freely available source code for modification and distribution.
Applications and Software
Package Manager
Tool that automates software installation, updates, and dependency resolution.
Applications and Software
Cache
Temporary storage of web data to speed up future page loads.
Applications and Software
Cookies
Small data files websites store on your computer for tracking or preferences.
Applications and Software
Proxy Settings
Browser configuration to route traffic through an intermediary server.
Applications and Software
Software Installation, Licensing, and Browser Settings
L-I-C-E-N-S-E: **L**icense types, **I**nstallation methods, **C**onfigure browsers, **E**nsure updates, **N**ever pirate, **S**ecure sources, **E**liminate old software.
Applications and Software
Software Installation, Licensing, and Browser Settings
The CompTIA Tech+ exam often asks about the differences between perpetual and subscription licenses, and the benefits of open-source software. Be ready to identify common installation file types like .exe and .msi, and the purpose of browser settings like clearing cache/cookies.
Applications and Software
Software Installation, Licensing, and Browser Settings
Downloading software from unofficial or untrusted websites, risking malware.
Applications and Software
Software Installation, Licensing, and Browser Settings
Ignoring software updates, leaving systems vulnerable to security threats.
Applications and Software
Software Installation, Licensing, and Browser Settings
Simply deleting application folders instead of using proper uninstall methods, leaving residual files.
Applications and Software
Compiled Language
Source code translated fully to machine code before execution.
Software Development Concepts
Interpreted Language
Source code translated line-by-line at runtime.
Software Development Concepts
High-Level Language
Human-readable, abstracts hardware, used for applications.
Software Development Concepts
Scripting Language
Interpreted language for automation and system tasks.
Software Development Concepts
Markup Language
Defines structure and presentation, not program logic.
Software Development Concepts
Compiler
Software that translates source code into machine code.
Software Development Concepts
Interpreter
Software that executes source code line by line.
Software Development Concepts
Source Code
Human-readable instructions written by a programmer.
Software Development Concepts
Programming Language Categories and Uses
C-I-S-M: Compiled (fast), Interpreted (flexible), Scripting (automation), Markup (structure).
Software Development Concepts
Programming Language Categories and Uses
The CompTIA Tech+ exam expects you to distinguish between compiled and interpreted languages, and to identify common uses for scripting languages (e.g., automation, system administration) and markup languages (e.g., structuring web content with HTML). Focus on the 'why' each category is used.
Software Development Concepts
Programming Language Categories and Uses
Confusing the role of a compiler with an interpreter; remember one translates everything at once, the other line-by-line.
Software Development Concepts
Programming Language Categories and Uses
Thinking markup languages can perform complex calculations or logic like programming languages.
Software Development Concepts
Programming Language Categories and Uses
Assuming scripting languages are always 'simpler' or less powerful than high-level programming languages; they are often high-level themselves, just used for specific purposes.
Software Development Concepts
Variable
A named storage location for a value in a program.
Software Development Concepts
Data Type
Specifies the kind of value a variable can hold (e.g., number, text).
Software Development Concepts
Integer
A data type for storing whole numbers (e.g., 1, 100).
Software Development Concepts
Float
A data type for storing numbers with decimal points (e.g., 3.14).
Software Development Concepts
String
A data type for storing sequences of characters, or text.
Software Development Concepts
Boolean
A data type for storing a truth value: either true or false.
Software Development Concepts
Array
A collection of multiple values, typically of the same data type.
Software Development Concepts
Index
The numerical position of an element within an array, usually starting from zero.
Software Development Concepts
Variables, Data Types, and Arrays
VAD: Variables Are Data (holders). Remember VAD to recall the core concepts of this lesson.
Software Development Concepts
Variables, Data Types, and Arrays
The exam often asks you to identify the appropriate data type for a given piece of information. Keywords like 'whole number', 'decimal', 'text', or 'true/false' are strong indicators. Remember that an array stores multiple values.
Software Development Concepts
Variables, Data Types, and Arrays
Confusing a variable (single value) with an array (collection of values).
Software Development Concepts
Variables, Data Types, and Arrays
Using the wrong data type for a variable, leading to errors or inefficient memory use.
Software Development Concepts
Variables, Data Types, and Arrays
Forgetting that array indexes typically start from zero, not one.
Software Development Concepts
Pseudocode
Informal, high-level description of an algorithm for human understanding.
Software Development Concepts
Flowchart
Diagrammatic representation of an algorithm or process using standard symbols.
Software Development Concepts
Algorithm
A set of well-defined, step-by-step instructions to solve a problem.
Software Development Concepts
Process (Flowchart)
An action or operation represented by a rectangle in a flowchart.
Software Development Concepts
Decision (Flowchart)
A point where a choice is made, represented by a diamond.
Software Development Concepts
Input/Output (Flowchart)
Data entering or leaving the system, represented by a parallelogram.
Software Development Concepts
Start/End (Flowchart)
The beginning or termination of a process, represented by an oval.
Software Development Concepts
Pseudocode and Flowcharts
PFD: Pseudocode For Details, Flowcharts For Diagrams! Helps you remember their primary strengths.
Software Development Concepts
Pseudocode and Flowcharts
The exam often tests your ability to interpret simple pseudocode or flowcharts. Look for keywords like 'IF/THEN/ELSE', 'FOR/WHILE', 'START/END', and recognize standard flowchart symbols and their meanings.
Software Development Concepts
Pseudocode and Flowcharts
Confusing pseudocode with actual programming language syntax.
Software Development Concepts
Pseudocode and Flowcharts
Misinterpreting standard flowchart symbols or their flow direction.
Software Development Concepts
Pseudocode and Flowcharts
Trying to write code directly without planning, leading to more errors and rework.
Software Development Concepts
Branching
Executing different code paths based on conditions.
Software Development Concepts
Loop
Repeats a block of code until a condition is met.
Software Development Concepts
Function
A named, reusable block of code for a specific task.
Software Development Concepts
Object
Combines data and methods; an instance of a class.
Software Development Concepts
Class
A blueprint for creating objects, defining their structure.
Software Development Concepts
Method
A function associated with an object or class.
Software Development Concepts
Attribute
A piece of data or property associated with an object.
Software Development Concepts
Branching, Loops, Functions, and Objects
BLOF: Branching, Loops, Objects, Functions. Remember 'BLOF' as the 'Building Blocks of Logic and Organization in Programming'.
Software Development Concepts
Branching, Loops, Functions, and Objects
The exam often presents pseudocode snippets and asks you to identify the programming construct being used. Look for keywords like 'IF', 'ELSE', 'FOR', 'WHILE', 'FUNCTION', 'CALL', and 'CLASS' or 'OBJECT' to quickly categorize the code's purpose.
Software Development Concepts
Branching, Loops, Functions, and Objects
Confusing 'for' loops (fixed iterations) with 'while' loops (condition-based iterations).
Software Development Concepts
Branching, Loops, Functions, and Objects
Forgetting to define a function before trying to call it, leading to 'undefined' errors.
Software Development Concepts
Branching, Loops, Functions, and Objects
Not understanding that an object is an *instance* of a class, not the class itself.
Software Development Concepts
Relational Database
Database organizing data into structured tables with predefined relationships, typically using SQL.
Data and Database Fundamentals
Non-Relational Database
Database storing data in flexible, non-tabular formats, also known as NoSQL databases.
Data and Database Fundamentals
SQL
Structured Query Language, used for managing and querying relational databases.
Data and Database Fundamentals
NoSQL
Not only SQL; a category of databases providing flexible schemas and horizontal scalability.
Data and Database Fundamentals
Structured Data
Data with a defined format, schema, and organization, typically in tables.
Data and Database Fundamentals
Unstructured Data
Data without a predefined format or organization, like text documents or multimedia.
Data and Database Fundamentals
Schema
The logical design or blueprint that defines the structure of a database.
Data and Database Fundamentals
ACID Properties
Atomicity, Consistency, Isolation, Durability; ensure reliable transaction processing in relational databases.
Data and Database Fundamentals
Relational vs. Non-Relational Databases
Think of 'SQL' as 'Structured Queries for Logic' (relational) and 'NoSQL' as 'No Strict Organization, Lots of Scale' (non-relational).
Data and Database Fundamentals
Relational vs. Non-Relational Databases
The exam often tests your ability to choose the correct database type for a given scenario. Look for keywords like 'structured data,' 'transactions,' and 'consistency' for relational, and 'unstructured data,' 'scalability,' and 'flexibility' for non-relational (NoSQL).
Data and Database Fundamentals
Relational vs. Non-Relational Databases
Assuming all databases use SQL for querying.
Data and Database Fundamentals
Relational vs. Non-Relational Databases
Trying to force unstructured data into a rigid relational schema.
Data and Database Fundamentals
Relational vs. Non-Relational Databases
Choosing a non-relational database when strong transactional consistency is paramount.
Data and Database Fundamentals
Table
A structured collection of data organized into rows and columns.
Data and Database Fundamentals
Record (Row)
A single, complete entry or instance of data within a table.
Data and Database Fundamentals
Field (Column)
A specific attribute or piece of information for each record.
Data and Database Fundamentals
Primary Key
A field that uniquely identifies each record in a table.
Data and Database Fundamentals
Foreign Key
A field that links to the primary key of another table.
Data and Database Fundamentals
Tables, Records, Fields, and Keys
Imagine a 'TABLE' is like a school yearbook. Each 'RECORD' is a student's photo and info. Each 'FIELD' is a detail like 'Name' or 'Grade'. The 'PRIMARY KEY' is the student's unique ID number. If you link to another yearbook's 'PRIMARY KEY', that's a 'FOREIGN KEY'.
Data and Database Fundamentals
Tables, Records, Fields, and Keys
For the CompTIA Tech+ exam, memorize that a primary key must be unique and cannot contain null values. Understand that foreign keys establish relationships between tables by referencing primary keys.
Data and Database Fundamentals
Tables, Records, Fields, and Keys
Confusing a record (row) with a field (column).
Data and Database Fundamentals
Tables, Records, Fields, and Keys
Assuming a primary key can have duplicate values or be left blank.
Data and Database Fundamentals
Tables, Records, Fields, and Keys
Not understanding that foreign keys link to primary keys in other tables.
Data and Database Fundamentals
DDL
Data Definition Language; defines database structure.
Data and Database Fundamentals
DML
Data Manipulation Language; manages data within tables.
Data and Database Fundamentals
DCL
Data Control Language; manages database permissions.
Data and Database Fundamentals
SELECT
DML command to retrieve data from a database.
Data and Database Fundamentals
INSERT
DML command to add new rows to a table.
Data and Database Fundamentals
UPDATE
DML command to modify existing data in a table.
Data and Database Fundamentals
CREATE
DDL command to build new database objects.
Data and Database Fundamentals
SQL Basics: Queries and Statements
Think of SQL as a 'CADS' system for your data: CREATE/ALTER/DROP (DDL) for structure, SELECT/INSERT/UPDATE/DELETE (DML) for data, and GRANT/REVOKE (DCL) for security.
Data and Database Fundamentals
SQL Basics: Queries and Statements
The CompTIA Tech+ exam often tests your ability to identify the purpose of common SQL commands. Focus on associating CREATE, ALTER, DROP with DDL; SELECT, INSERT, UPDATE, DELETE with DML; and GRANT, REVOKE with DCL.
Data and Database Fundamentals
SQL Basics: Queries and Statements
Confusing DDL and DML commands: Remember DDL is for structure (tables, columns), DML is for data (rows, values).
Data and Database Fundamentals
SQL Basics: Queries and Statements
Forgetting the WHERE clause in UPDATE/DELETE: Without it, you might accidentally modify or delete ALL records in a table.
Data and Database Fundamentals
SQL Basics: Queries and Statements
Misunderstanding GRANT/REVOKE: These control access, not the data itself.
Data and Database Fundamentals
Data Backup
Copying data to restore it after loss.
Data and Database Fundamentals
Full Backup
Copies all selected data.
Data and Database Fundamentals
Incremental Backup
Copies data changed since the last backup (full or incremental).
Data and Database Fundamentals
Differential Backup
Copies data changed since the last full backup.
Data and Database Fundamentals
3-2-1 Backup Rule
Keep 3 copies, on 2 media, with 1 offsite.
Data and Database Fundamentals
Data-Driven Decision
Decisions based on facts, metrics, and data.
Data and Database Fundamentals
Quantitative Data
Numerical data that can be measured or counted.
Data and Database Fundamentals
Qualitative Data
Descriptive, non-numerical data providing context.
Data and Database Fundamentals
Data Backup and Data-Driven Decisions
To remember the 3-2-1 rule: 'Three copies, two types of media, one offsite. Think of a safety deposit box for your data!'
Data and Database Fundamentals
Data Backup and Data-Driven Decisions
The CompTIA Tech+ exam frequently asks about the differences between backup types (full, incremental, differential) and the components of the 3-2-1 backup rule. Memorize these definitions and their implications for recovery time and storage.
Data and Database Fundamentals
Data Backup and Data-Driven Decisions
Forgetting to test backups regularly; a backup that isn't restorable is useless.
Data and Database Fundamentals
Data Backup and Data-Driven Decisions
Not having an offsite copy; local disasters can destroy all local backups.
Data and Database Fundamentals
Data Backup and Data-Driven Decisions
Confusing incremental and differential backups, especially regarding restoration complexity.
Data and Database Fundamentals
CIA Triad
Confidentiality, Integrity, Availability – core security principles.
Security
Confidentiality
Preventing unauthorized disclosure of information.
Security
Integrity
Maintaining accuracy and consistency of data.
Security
Availability
Ensuring authorized users can access resources when needed.
Security
Access Control
Selective restriction of access to resources.
Security
Least Privilege
Granting only minimum necessary permissions.
Security
RBAC
Role-Based Access Control; permissions based on user roles.
Security
DAC
Discretionary Access Control; resource owner grants access.
Security
CIA Triad and Access Control Concepts
Remember the CIA Triad with 'Can I Access?' – Confidentiality, Integrity, Availability.
Security
CIA Triad and Access Control Concepts
The exam often tests your ability to apply CIA Triad principles to scenarios. Look for keywords like 'unauthorized viewing' (confidentiality), 'data tampering' (integrity), or 'system downtime' (availability). Be prepared to distinguish between different access control types and identify when least privilege is being applied or violated.
Security
CIA Triad and Access Control Concepts
Confusing integrity with confidentiality (integrity is about data accuracy, confidentiality is about secrecy).
Security
CIA Triad and Access Control Concepts
Granting excessive permissions to users or applications, violating the principle of least privilege.
Security
CIA Triad and Access Control Concepts
Neglecting one aspect of the CIA Triad in favor of another, leading to security gaps.
Security
Password Policy
Rules defining password requirements like length, complexity, and expiration.
Security
Authentication Factor
A category of information or item used to verify a user's identity.
Security
Multi-Factor Authentication (MFA)
Requires two or more distinct authentication factors for identity verification.
Security
Something You Know
An authentication factor like a password or PIN.
Security
Something You Have
An authentication factor like a smart card, token, or mobile phone.
Security
Something You Are
An authentication factor based on biometrics (e.g., fingerprint, face).
Security
Single Sign-On (SSO)
Allows one login to access multiple independent software systems.
Security
Biometrics
Authentication using unique biological characteristics like fingerprints or facial scans.
Security
Passwords, MFA, and Authentication Methods
K-H-A: Know, Have, Are. Remember the three types of authentication factors by thinking 'I KNOW what I HAVE, and I AM myself!'
Security
Passwords, MFA, and Authentication Methods
The exam expects you to differentiate between authentication factors (know, have, are) and understand how MFA combines them. Be ready to identify examples of each factor and how they contribute to a layered security approach.
Security
Passwords, MFA, and Authentication Methods
Confusing SSO with MFA: SSO is about convenience across systems, MFA is about stronger identity verification for a single access.
Security
Passwords, MFA, and Authentication Methods
Believing biometrics alone are infallible: Biometrics can be spoofed or fail, so they are often best used as part of MFA.
Security
Passwords, MFA, and Authentication Methods
Underestimating the importance of password managers: Many users still rely on weak or reused passwords, making them vulnerable.
Security
Malware
Malicious software designed to damage or gain unauthorized access.
Security
Virus
Malware that attaches to programs and spreads when executed.
Security
Worm
Self-replicating malware that spreads across networks.
Security