chayyakk's

 Section A – Self Introduction (1–5) 1. Tell me about yourself. 2. Walk me through your career journey. 3. Why are you looking for a job change? 4. Why do you want to join our Org? 5. What makes you suitable for this role? Section B – Technical Leadership (6–15) 6. Tell me about the most technically challenging project you've worked on. 7. What was your role as a Technical Lead? 8. How do you divide work among team members? 9. How do you mentor junior engineers? 10. How do you conduct code reviews? 11. How do you ensure coding quality? 12. Tell me about a major production issue you resolved. 13. Describe a difficult technical decision you made. 14. How do you balance technical debt and feature delivery? 15. How do you estimate firmware development effort? Section C – Product Ownership (16–25) 16. What are your responsibilities as a Product Owner? 17. How do you prioritize the product backlog? 18. How do you manage changing cust...

  Section A – Firmware Architecture (1–10) 1. Design the firmware architecture for an Automotive ECU. Include: Bootloader Application RTOS Drivers Middleware Diagnostics Application Layer 2. How would you layer an embedded software architecture? Explain: HAL MCAL Drivers Middleware Application 3. How would you organize a large embedded firmware project with more than 500 source files? 4. How would you design a reusable firmware architecture supporting multiple hardware variants? 5. Explain your preferred software layering approach. 6. How would you minimize dependencies between modules? 7. How would you design a firmware architecture for easy unit testing? 8. How would you implement dependency injection in embedded systems? 9. How would you support multiple product variants using the same codebase? 10. How would you manage configuration across multiple ECU variants? Section B – BSP Architecture (11–20) 11. Design a Lin...

  Section A – Bootloader Debugging (1–10) 1. The ECU powers ON, but nothing appears on the UART console. How would you debug it step by step? 2. The Bootloader starts correctly but never jumps to the application. Possible reasons? 3. After the Bootloader jumps, the application immediately enters a HardFault. Explain your debugging approach. 4. The Bootloader verifies the image CRC successfully, but signature verification fails. Possible causes? 5. Programming completes successfully, but after reset the ECU always enters Bootloader mode. Why? 6. The Bootloader hangs during Flash Erase. Possible causes? 7. Firmware update works on one hardware revision but fails on another. How would you isolate the issue? 8. During OTA, power is lost while programming Flash. Design the recovery mechanism. 9. After firmware update, CAN communication no longer works. Possible reasons? 10. The Bootloader consumes twice the expected boot time. How would you optimiz...

  Section A – Bootloader Fundamentals (1–10) 1. What is a Bootloader? Why is it required? 2. What are the responsibilities of a Bootloader? 3. Explain the complete boot sequence from Power-On Reset until the application starts. 4. Difference between: Primary Bootloader (PBL) Secondary Bootloader (SBL) Application Bootloader 5. Explain the memory map of a typical automotive ECU containing: Bootloader Application Calibration NVM Backup area 6. Why is a Bootloader typically write-protected? 7. What happens immediately after reset? 8. How does a Bootloader determine whether to remain in programming mode or jump to the application? 9. What validations are performed before transferring control to the application? 10. Describe the complete Bootloader state machine. Section B – Application Jump (11–18) 11. How does a Bootloader jump to an application on ARM Cortex-M? 12. Why must the Main Stack Pointer (MSP) be reinitialized before t...

  Section A – ARM Cortex-M Architecture (1–8) 1. What is ARM Cortex-M? Where is it typically used? 2. Differentiate between: Cortex-M0 Cortex-M3 Cortex-M4 Cortex-M7 Cortex-M33 3. Explain the ARM Cortex-M architecture. Discuss: Harvard Architecture Pipeline Thumb/Thumb-2 instruction set Register organization 4. What are the advantages of Cortex-M over traditional microcontrollers? 5. Explain the ARM programmer's model. Describe the purpose of: R0–R12 SP (MSP/PSP) LR PC xPSR 6. What is the difference between MSP and PSP? 7. What happens immediately after a hardware reset? 8. Describe the complete boot sequence of a Cortex-M MCU from reset to main() . Section B – Startup Code & Linker (9–14) 9. What is the startup file ( startup.s or startup.c )? What does it do? 10. Explain the Vector Table. Why is it placed at address 0x00000000 (or remapped)? 11. What is the Reset Handler? 12. What is a Linker Script? W...