Electrical Interview Questions | Glassdoor

Electrical Interview Questions

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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.

New Professional Program, Electrical Engineer at SPAWAR Systems Center was asked...

Nov 25, 2009
 Describe a situation that required to be adapative1 AnswerWas a little stumped, I just talked about a class I took that was very bipolar from one week to the next.

New Professional Program, Electrical Engineer at SPAWAR Systems Center was asked...

Nov 25, 2009
 Describe a situation where you had a problem with one of your employees that you needed to resolve.1 AnswerI just talked about being a supervisor, and how you have to keep your employees motivated and not slacking off. To not be too mean, but not too nice either. Not sure I handled it the best...

Electrical Engineering Technician at Open Systems International was asked...

Jun 13, 2012
 Be able to give background information of what you have did in the line of work that you are applying for.1 AnswerThis was easy for me with military background and years of troubleshooting exp.

Electrical Engineer at LightPath was asked...

Jan 18, 2014
 Nothing was unexpected as I said questions were very on topics1 AnswerIf you selected for interview, you will be hired. Very nice supervisor

Senior Electrical Services Specialist at Siemens was asked...

Sep 22, 2013
 What software have you used to program PLCs (programmable logic controllers)? I work with system protection and construction and modification of higher voltage equipment (480V-500kV) and this question was more based for their building automation (climate control/fire suppression) group of which my hiring manager was more familiar with. Take away, know your stuff going in. It may benefit you to research specific Siemens applications and have something to talk about.1 AnswerI have used various ladder logic programs to program or troubleshoot PLCs however my use is infrequent as these systems are used primarily in lower voltage switches and transfer schemes and maybe once or twice every two years will I have to deal with these systems in this aspect. Because of this the programs and equipment is constantly evolving and I can not recall specific software, however Allen Bradly is a more common PLC that I have had to interact with but newer cheaper equipment from Asia is not uncommon to find anymore.

Mar 25, 2014
 The technical questions were easily answered. The question about salary is always a gamble. 1 AnswerI have 10 years of experience. I left my last company making XXX and I have been expecting a promotion for over a year. I would expect to make XXX based on my skill set, experience, and related job market.

Assembler Installer Electrical Systems B at Aviation Partners Boeing was asked...

Dec 5, 2010
 current role 1 Answeri work as an assembler

Dec 5, 2010