Category: OS
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Master Mutex in Multithreading | Beginner-Friendly Guide (2026)
Learn what a mutex is in multithreading with beginner-friendly examples, real-world analogies, and code. Understand mutex lock, unlock, race conditions, and the difference between mutex and semaphore. It’s 2 a.m., and you’re staring at your screen. Your program runs fine most of the time, but every now and then, something strange happens—data goes missing, values…
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QNX Explained: 5 Essential Ways It’s Superior to Other RTOS
If you’re diving into embedded systems, you’ve probably heard of QNX. But what is QNX, and how does it stand apart from other real-time operating systems (RTOSs) like FreeRTOS or VxWorks? In this post, we’ll explain what QNX is, explore its unique microkernel architecture, and compare its features with other popular RTOSs to help you…
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Character-Device Drivers QNX | QNX Tutorials 2026
Character-Device Drivers QNX : When you type something on your keyboard, the character-device driver is the first part of the system that reads and understands your input. The specific driver used depends on your hardware. To find out which one applies to your setup, check the documentation for devc-* drivers in the Utilities Reference. Note:…
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Master SPI Interview Questions (Beginner-Friendly 2026)
SPI Interview Questions : In this article, we will explore key interview questions and answers related to the SPI (Serial Peripheral Interface) protocol. SPI is a synchronous serial communication protocol widely used in embedded systems for data exchange between microcontrollers and peripheral devices such as sensors, memory modules, and displays. Understanding SPI and being able…
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Master Networking and Protocols in QNX (Beginner-Friendly guide 2026)
Networking and Protocols in QNX : Networking is an essential part of any modern embedded operating system. QNX, being a real-time operating system (RTOS), supports full TCP/IP networking capabilities, allowing devices to communicate reliably across networks. This article will help you understand: In QNX, Networking and Protocols refer to the mechanisms that enable communication between…
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Master Beginner-Friendly Guide to Memory Management in QNX (2026)
Memory management in QNX is a crucial part of any operating system. It refers to the way an OS handles computer memory (RAM), ensuring every program gets the memory it needs, without interfering with others. Whether you’re building apps or embedded systems, understanding memory management helps you write efficient and safe code. What is Memory…
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Master Inter-Process Communication 2026
What is IPC (Inter-Process Communication)? IPC (Inter-Process Communication) refers to mechanisms that allow multiple processes to communicate and synchronize with each other. Since processes in most operating systems run in isolated memory spaces, they require specific techniques to exchange data and coordinate actions. IPC methods include: QNX Message-Passing Mechanism QNX uses a synchronous message-passing IPC…
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Master Understanding of GPIO: Beginner-Friendly Tutorial (2026)
Introduction to GPIO GPIO : In the world of electronics and embedded systems, GPIO is a term you will encounter very often.GPIO stands for General Purpose Input/Output. It refers to programmable pins on a microcontroller, microprocessor, or SoC (System on Chip) that can be controlled through software to perform simple tasks like reading a sensor…
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Master Positional Parameters in Shell Scripting : Mastering $1, $2, $#, $@ (2026)
What Are Positional Parameters in Shell Scripting? Positional Parameters : Bash or shell scripting, positional parameters allow you to access arguments passed to a script or function. They are incredibly useful when you want to handle user inputs dynamically. Why Learn Positional Parameters? Key Positional Parameters Explained Parameter Meaning $1, $2, … First, second, etc.,…
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Master Loop in Shell Script : for, while, and until (Beginner’s Guide 2026)
Loop in Shell Script : Repeating tasks is a common need in programming, and Bash scripting makes it super simple with loops. Whether you’re a total beginner or just brushing up, this guide will walk you through for, while, and until loops in Bash in a clear and practical way. Loop in Shell Script :…