Start here

Three steps, about 15 minutes. Then one question a day.

1. Take the 5-question check

Give yourself 60 seconds per question. Say the answer out loud, no notes, then open it and compare.

1. When must you treat a PCB trace as a transmission line? SI-01
2. How does a buck converter work? Draw the inductor current. PW-01
3. An inverting amplifier has a gain of −10. What is its bandwidth? AN-02
4. How do you size I²C pull-up resistors? EM-02
5. How do you decide how many decoupling capacitors a processor needs? PI-01

2. Pick your track

• Missed SI-01 or EM-02: start with the SI & high-speed or Embedded track.
• Missed PW-01 or PI-01: start with the Power track.
• Missed AN-02: start with the General board track — analog comes first there.
• Got all five: the Senior system track. Your interviews will lean on design questions.

3. Watch one answer worked all the way through

The I²C pull-up question, the way it should sound in an interview: the idea first, then the two limits, then a choice and why. Read the worked answer, then try your own numbers in the calculator.

When you want the rest

Twelve questions are free here. The book has all 141, with what to say first, the numbers to quote and the follow-ups. About the book