This video includes interview questions based Microprocessor and Microcontroller:

You can learn all the basics from following playlists :

1. AVR Microcontroller : https://www.youtube.com/playlist?list=PLgwJf8NK-2e55CdbY_WnY6pejPHoojCkJ

2. Microprocessor 8085 : https://www.youtube.com/playlist?list=PLgwJf8NK-2e5vHwmowy_kGtjq9Ih0FzwN

3. Microprocessor 8086 : https://www.youtube.com/playlist?list=PLgwJf8NK-2e4oAeDid0hwuiol_RJdscrp