10 interview questions and answers on CAN-XL Protocol

Here’s a list of questions and answers about the CAN-XL Protocol. This guide can help you prepare for job interviews for CAN-XL Protocol skill requirements.

List of 10 CAN-XL Protocol Questions and Answers

Question 1: What is CAN XL?

Answer 1: It’s the latest version of the Controller Area Network protocol with higher data rates (up to 20 Mbps) and extended payloads.

Question 2: Mention difference between CAN FD and CAN XL.

Answer 2: CAN FD supports 64 bytes max at 5 Mbps; CAN XL supports 2048 bytes at 20 Mbps, improving efficiency.

Question 3: Why is CAN XL important?

Answer 3: It bridges the gap between CAN based and Ethernet based in-vehicle networks, enabling faster and richer data exchange.

Question 4: What layer does CAN XL enhance?

Answer 4: Primarily the Data Link and Physical layers to accommodate higher throughput and reliability.

Question 5: Mention advantages of CAN XL protocol.

Answer 5: High bandwidth, backward compatibility with CAN/CAN FD and lower latency for future ADAS/IVI needs.

Question 6: What physical medium does CAN XL use?

Answer 6: Twisted pair cables similar to legacy CAN, easing transition for OEMs.

Question 7: Is CAN XL compatible with Ethernet?

Answer 7: CAN XL supports Ethernet type frame formats, promoting easier data conversion and hybrid architectures.

Question 8: Where is CAN XL used?

Answer 8: Future automotive networks, especially for zonal architectures and high data rate ECUs.

Question 9: Who develops CAN XL?

Answer 9: The protocol is being developed and standardized by CAN in Automation (CiA).

Question 10: How does it help ADAS?

Answer 10: Supports higher data demands of camera, radar and sensor fusion systems.