Ciena Embedded Software Engineer 2B - Linux Kernel interview questions

I appeared for F2F in Ciena Gurgaon Office. 3 Technical rounds, each round ~1.30 Hour . Questions related to projects written in resume, OS, Kernel,Device drivers,I2C,MDIO,SPI, CPU etc. 1 Round with Senior Manager ~30 Mins. Past project related discussion. After 2 weeks, I had another technical round with Canada team. Skype round with Canada team ~ 1.30 Hour.