Process Development Interview Questions | Glassdoor

# Process Development Interview Questions

142

Process development interview questions shared by candidates

## Top Interview Questions

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### Process Development Engineer at Cree was asked...

Oct 30, 2011
 Can Si be used to make LEDs ?3 AnswersSi can be used as a substrate in LEDs, but it cannot be used in the p-n junction because the bandgap energy is too small to produce visible light.Technically: Yes. But it has an indirect bandgap, so you really wouldn't want to.The energy bandgap of Si at room temperature is 1.12eV. Since the relationship between photon energy and wavelength is E(eV)=1.24/wavelength(micrometers), one can calculate that Si could emit a ligth in infrared optical spectrum: wavelength=1.24/1.12eV=1.11 micrometers. BUT, Si is indirect semiconductor! And therefore does not emit significant amounts of light due to the requirement of momentum conservation in optical transitions.

### Process Development Engineer at Cree was asked...

Mar 7, 2013
 Estimate the number of flat tyres in the US in a year?3 AnswersGive a ball park figure based on your reasoning. Should be simplePer Wiki, 220 million. One would need to know how many cars are driven in US or that a flat tire occurs every 7 seconds. Did you know "Current US Population is 314.69 million".345632. How can you say that? Go count yourself

### Process Development Engineer at Cree was asked...

Feb 29, 2012
 If a glass of water is half full and you put ice in it, when ice melts, the water level will increase of decrease or remain constant? Give scientific reason.2 AnswersIt will remain constantThe ice will float with a fraction of the ice cube sticking above the surface which is determined by the ratio of the density of water to the density of ice. Since these densities do not change as the ice melts, the fraction of ice above the water surface will never change. Since the fraction of ice above the water's surface never changes, the volume decrease of ice below the water surface during melting is always exactly replaced with an equivalent volume of melt. Therefore the water level in the glass will not change throughout the melting process.

### Process Development Engineer at Cree was asked...

Mar 18, 2011
 How many barbers to cut men's hair in a city of 2 million people?2 Answers~3000 barbers. Work your way to the answer.I got the same answer, based on eight hour work days with 2 weeks of vacation each year. Based on the interviews I have read, if CREE hired the barbers, they would only need 1500, since they would be working 80-hour weeks.

### Process Development Engineer at Applied Medical was asked...

Feb 5, 2013
 The panel interview make it very difficult to concentrate. Several ppl attacked the candidates at once. They ask a lot of technical question on how you overcome difficult projects that you encountered. They dont offer water, breaks or comfortable conference room2 AnswersIsn't that the purpose of an interview? To see how you overcome difficult projects? Water? Breaks? Comfortable room? How long did this interview last? Did they hold it in the janitors closet too?Your viewpoint sound reasonable at first but that really depends how you look at it. Remember the interview is a TWO-WAY process. If that is how your future employer treats you, would you want to work for them? Your comment is inappropriate / offensive when you said about holding the interview in a janitor closet but I did not flag you. R U the manager working at Applied Medical? With that slanderous comment, you deserve what you got. Not to mention Applied Medical pay dirt cheap, very high turnover rate & you are expected to work remotely (evenings & weekends).

### Downstream Process Development Associate at KBI BioPharma was asked...

May 3, 2014
 Name different ways proteins can be separated, besides what your experience shows.1 AnswerI detailed physical properties of proteins and listed purification methods based on the properties. They were very interested in my working knowledge of a specific separation method which I won't detail. My recommendation is to know the job you're applying for and what questions to expect. This was a question I was prepared to answer in detail.

Jul 21, 2010
 Do you favor working as a member of a team or on your own?1 AnswerTeaming is very important to the company.

### Chemical Process, Manufacturing, Development Engineer at BST Systems was asked...

May 11, 2014
 What would be the time mix that I would prefer , Computer / Document , vs out in the plant .1 AnswerBasically , whatever would be required to achieve the objective. I am most oriented to on the floor work .

### Process Development Engineer at Cree was asked...

Jun 18, 2012
 What is an LED?1 Answera pn junction

### Process Development Engineer at Cree was asked...

Jun 18, 2012
 If I have two sons whose ages when added together is 20 and when subtracted is 1, what are their ages?1 Answer10.5 and 9.5
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