Design Engineer Interview Questions

17,635 design engineer interview questions shared by candidates

Most difficult was how would you write a script to calculate the latency of a PCIE bus given a data base of several transactions, and their completions. An easier one that was asked that was unexpected, given I am more HW is: Write a function to detect a one-hot encoded state variable. I sort of bombed it at the interview, but looked into the solution in detail after the interview.
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Senior Design Engineer

Interviewed at Xilinx

4.2
Feb 19, 2014

Most difficult was how would you write a script to calculate the latency of a PCIE bus given a data base of several transactions, and their completions. An easier one that was asked that was unexpected, given I am more HW is: Write a function to detect a one-hot encoded state variable. I sort of bombed it at the interview, but looked into the solution in detail after the interview.

1) Given an NMOS, 5V on Drain, 4V on Gate, what is voltage on source? 2) What happens when using a NMOS to pull up and/or a PMOS to pull down? 3) Given a rotating disk that's 1/4 black and 3/4 white, assume you have two sensors 90 degrees apart. How can you determine the direction the disk is rotating (clockwise vs counterclockwise) with some cmos circuit?
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Mixed Signal IC Design Engineer

Interviewed at Analog Bits

4.2
Jul 17, 2013

1) Given an NMOS, 5V on Drain, 4V on Gate, what is voltage on source? 2) What happens when using a NMOS to pull up and/or a PMOS to pull down? 3) Given a rotating disk that's 1/4 black and 3/4 white, assume you have two sensors 90 degrees apart. How can you determine the direction the disk is rotating (clockwise vs counterclockwise) with some cmos circuit?

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