Field and vehicle protocols: interview prep

Interview questions

Key points for each answer are in the app's question bank.

1. Describe a classic CAN frame.Basic
2. How does CAN arbitration work?Basic
3. What is bit stuffing in CAN, and why is it needed?Intermediate
4. Explain CAN error states: error active, error passive and bus-off.Intermediate
5. What does CAN FD change compared with classic CAN?Intermediate
6. How does a LIN network schedule communication?Intermediate
7. Name key UDS services and what they do.Intermediate
8. How does ISO-TP send a message longer than 8 bytes?Intermediate
9. What is a DBC file?Basic
10. Describe a Modbus RTU frame.Basic
11. Compare RS-232 and RS-485.Basic
12. What are automotive Ethernet and SOME/IP used for?Intermediate
13. Why does a CAN bus need 120 Ω terminations at both ends?Basic
14. Write code to extract a signal from a CAN frame given start bit, length and byte order.Intermediate

Hands-on challenges

Design rounds

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