Electrical Hardware Engineer Interview Questions | Glassdoor

Electrical Hardware Engineer Interview Questions

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Electrical hardware engineer interview questions shared by candidates

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Apr 10, 2014

Electrical Engineer (Hardware Test Lab) at SpaceX was asked...

Feb 15, 2012
 Asked to identify various electrical components, tools, data sheets, etc.1 AnswerEasy/fun aspect of the interview.

Electrical Engineer (Hardware Test Lab) at SpaceX was asked...

Feb 15, 2012
 Written skills test1 AnswerMay be asked to take this prior to arrival, although I was had not been.

Electrical Engineer (Hardware Test Lab) at SpaceX was asked...

Feb 15, 2012
 Derive the differential equations of motion for a given mechanical system and calculate the transfer function.1 AnswerThis was a simple second order system with damping. Brush up on the basics.

Electrical Hardware Engineer, Camera Systems at Google was asked...

Apr 10, 2014
 How do you prevent quantization errors from stacking up when reducing a number's precision by a divide or bit-shift operation?1 AnswerI did not know the answer outright because I haven't done much with DSP's or recursive filtering. But I was able to arrive at the answer pretty quickly. The basic idea is that you might split a 32bit word into 2x 16bit fields to do a sort of quasi-floating point math using purely unsigned integer data types. The high 16 bits represent the integer part of the number, and the low 16 bits represents the fractional part. When you're done doing your math on this quasi-FP number and you need to convert it back into a normal integer, you can just divide by 2^16, or bit shift right by 16 bits, but that introduces a quantization error by throwing away the fractional part. If the output bit-shifted number is used in a recursive filter, then how do you prevent your filter from accumulating the effect of always rounding down? I suggested that you should design the filter to alternate rounding down and rounding up on every other sample, so at least the intrinsic system bias is removed. This turned out to be correct, but it took 5-10 minutes to get there, and I got the feeling that the interviewer would have preferred that I just knew the answer. It ended up being a problem solving kind of question for something I think I was just supposed to know. Again, if DSP algorithms were important to this job, then why didn't it say so in the job description? But I could be wrong on this - it's just a feeling I got.

Electrical Hardware Engineer at Apple was asked...

Jun 25, 2010
 What would be the most efficient way to detect overflow/underflow in FIFOs?Be the first to answer this question

Electrical Engineer (Hardware Test Lab) at SpaceX was asked...

Feb 15, 2012
 Programming concepts: space/time complexity, threading, heap/stack concepts.Be the first to answer this question

Electrical Hardware Engineer at Garmin was asked...

Jul 12, 2010
 Tell me about yourselfBe the first to answer this question

Electrical Engineer (Hardware Test Lab) at SpaceX was asked...

Feb 15, 2012
 Circuit analysis, Op-Amp questions Be the first to answer this question

Electrical/Hardware Engineer at Brisk Engineering was asked...

May 12, 2013
 what was your long-term career planBe the first to answer this question
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