Electrical Concepts to Review

What is the difference between a capacitor and an inductor and how are they commonly used?
How do basic analog components like diodes and capacitors work?
Can you describe a voltage divider and how it works?
What measurement devices can you use to diagnose and measure analog circuits?

What is the difference between analog vs. digital signals?
What is the nyquist theorem and how do you define a sufficient sampling rate

What are the three common communication protocols? How do they (I2C, SPI, UART) work?
What are the different methods of data transmission and unique advantages/disadvanages?