Knowledge Domains

69 in-depth topic articles across 12 domains, organized from foundational to advanced.

Each article covers concepts, interview questions, practice quizzes, and real-world scenarios.

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Core skills tested in every embedded interview

C/C++ Programming & Low-Level Foundations

12 topics

Core C/C++ programming skills and low-level concepts essential for embedded development

Foundation skills — always tested in interviews

Build Systems

6 topics

Compilation pipeline, toolchains, linker scripts, memory layout, and binary inspection

Core toolchain knowledge — frequently tested across embedded roles

MCU & System Architecture

5 topics

CPU fundamentals, MCU cores, boot process, interrupts, and driver design

Core embedded skills — essential for all roles

Peripherals

10 topics

Essential peripheral interfaces and communication protocols

Core peripheral knowledge — frequently tested

Intermediate

Deeper topics for mid-level and senior roles

Hardware & Power Design

3 topics

Hardware fundamentals, signal integrity, and low-power design for firmware engineers

Hardware understanding and power optimization

RTOS & Real-Time

4 topics

Real-time programming concepts, task scheduling, and RTOS fundamentals

Critical for senior roles

State Machines

4 topics

FSM fundamentals, implementation patterns, event-driven design, and hierarchical state machines

Core firmware design skill — every protocol parser is an FSM

Networking & Protocols

5 topics

TCP/IP, sockets, MQTT, HTTP/REST, and TLS for embedded connectivity

High priority for IoT and connected device roles

Wireless Technologies

7 topics

BLE, WiFi, LoRa, cellular IoT, UWB, and mesh networking for embedded systems

Essential for IoT, wearable, and connected device roles

Advanced

Specialized knowledge for senior and lead positions

Embedded Linux Essentials

6 topics

Linux kernel basics, build systems, and user-space programming

For Linux-based embedded systems

Debugging, Testing & Tools

3 topics

Debugging techniques, testing strategies, power profiling, and development tools

Practical skills — essential for all embedded roles

Safety, Security & Reliability

4 topics

Safety standards, security fundamentals, OTA updates, and reliability engineering

Critical for safety-critical and secure systems