Free Udemy Course: Embedded Linux Interview Prep: 600+ Most Asked Questions

This course is meticulously designed to help engineers and professionals prepare for technical interviews and assessments in the field of Embedded Linux Development. Through over 600+ carefully curated questions, the course provides deep insights, real-world context, and conceptual clarity across all core domains required for mastering embedded systems powered by Linux.Whether you're targeting roles involving kernel development, device driver integration, real-time systems, or build automation, this course provides the breadth and depth needed to build and validate your expertise.Who Should Take This Course?Embedded Linux developers preparing for technical interviewsFirmware engineers transitioning to Linux-based systemsFinal-year engineering students interested in system-level softwareProfessionals working on BSPs, device drivers, or build pipelinesAnyone pursuing Yocto, Buildroot, or U-Boot project rolesWhat You’ll Learn (Syllabus)1. Embedded Linux System Architecture• Linux kernel architecture: monolithic vs microkernel• Role of bootloader, kernel, root filesystem• User space vs kernel space concepts• Device Tree structure and overlays• Understanding U-Boot and GRUB2. Linux Kernel and Device Drivers• Kernel configuration and compilation• Kernel modules vs built-in drivers• Writing and loading kernel modules using insmod, rmmod, modprobe• Character vs block drivers• Platform drivers and device tree integration• Interrupt handling: ISRs, bottom half, tasklets, work queues• GPIO, I2C, SPI, UART driver interfaces3. Bootloader (U-Boot Focus)• Bootloader stages: SPL, U-Boot proper• U-Boot environment variables• Porting U-Boot to custom hardware• Booting via MMC, NAND, TFTP, NFS• Scripted booting with bootcmd and bootargs4. Root Filesystem and Build Systems• Filesystem types: ext4, squashfs, jffs2, ubifs• Creating minimal root filesystems with BusyBox• Build systems overview: Yocto, Buildroot, OpenEmbedded• Init systems: systemd, SysVinit5. Toolchain and Cross-Compilation• Cross-compiling vs native compiling• Toolchain components: GCC, binutils, glibc, GDB• Using toolchains from Yocto or Buildroot• Common linking and runtime error fixes• Architecture-specific optimizations for ARM, MIPS, RISC-V6. Debugging and Performance• GDB remote debugging using gdbserver• Logging with printk and analyzing kernel logs using dmesg• Performance profiling using ftrace, perf, systemtap• Valgrind and kmemcheck for memory issues• Boot log analysis and serial console-based debugging7. Networking and Protocols in Embedded Linux• TCP/IP stack internals and Ethernet basics• Lightweight IoT protocols: MQTT, CoAP• NFS and TFTP setup for development• Network tools: ifconfig, ip, netstat, ping, traceroute, tcpdump• Writing simple socket programs8. Security and Hardening• Secure boot with U-Boot and TPM integration• Filesystem-level security: permissions, SELinux, AppArmor• Kernel hardening: seccomp, ASLR, stack protection• Secure firmware updates using RAUC and Mender9. Real-Time Linux• PREEMPT-RT patch vs standard kernel behavior• Real-time scheduling policies: FIFO, RR, Deadline• Latency and jitter measurement tools• Writing real-time applications using pthreads and timerfd10. Interfacing and Peripherals• Controlling GPIO, I2C, SPI via /sys and /dev interfaces• Writing user-space drivers with mmap• Interfacing ADCs, DACs, and sensors• Using the USB gadget framework• Serial communication and RS-485 handling11. Embedded Linux Application Development• Multithreading with POSIX threads• IPC mechanisms: pipe, FIFO, shared memory, message queues• Signals and proper signal handling• Daemon creation and init script basics• File I/O and memory-mapped file operations12. Version Control and CI/CD for Embedded Projects• Git workflows: rebase, bisect, submodules• CI tools overview: Jenkins, GitHub Actions, GitLab CI• Automated builds using Yocto and Buildroot• Embedded-focused testing: Robot Framework, Linux Test Project (LTP)This course provides an unmatched collection of interview-centric practice material, ensuring that you're well-prepared for embedded software developer roles across industries such as automotive, industrial automation, IoT, medical devices, and defense systems.