research and development scientist Interview Questions

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Samsung Electronics
Senior Research Scientist was asked...October 22, 2016

What's your strengths for this position

5 Answers

For this famous company it will lead to hundred percent

Gk question

India

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Amazon

Throw a fair die 100 times, what is the probability that you will get more than 75 tails?

5 Answers

Umm...A die has six faces, so what's "heads"?

You add up the binomial distribution for k = 76 to 100, i.e. (100 k) * p ^k * (1-p) ^ 100-k for p=1/2, where (100 k) is "100 choose k", the binomial coefficient. The idea is to figure out how many paths lead to each of the 101 final outcomes of the "tree" (which is defined by the "100 choose k" coefficients") and multiply each one by it's probability. Pascal's triangle makes things easy to think about. Less

Approximate a Binomial distribution by a normal distribution.

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TotalEnergies

When can you start to work?

4 Answers

Immediately

Now

After 2 months

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Amazon

How to build a dictionary in such a way that it'd be efficient to search for all valid words which are permutations of a given string?

4 Answers

For each word in a dictionary as a value, build a key which is composed of lexicographically ordered characters. For example, value = apple key = aelpp. value = ocotopus key = cooopstu Then build an index from the keys, and you'll have all of the words that can be generated from re-ordering the elements. The result is efficient at run-time because it's constant run time. The construction of the index is also efficient because it only needs to run linearly, once. Less

Perhaps use a function of the sum of the string's char codes (and its length?) as a key in a first hashtable. This key should link to a second hashtable that would directly index each particular permutation of the word. Less

Hash table

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Toyota North America

In the Phone interview, they went through my resumes. In the on-site interview, I was asked to give a 15 min proposal presentation based on the topic they applied.

3 Answers

After the onsite interview did Toyota contact you regarding their decision?

A week later, I got an rejection email...

A week later, I got an rejection email...

Amazon

A little rude to statisticians.

3 Answers

What is the point of writing this review, when you do not tell what questions you were asked? What do you expect a reader to take away (learn and use) from your review? Less

What is the point of writing this review, when you do not tell what questions you were asked? What do you expect a reader to take away (learn and use) from your review? Less

What is the point of writing this review, when you do not tell what questions you were asked? What do you expect a reader to take away (learn and use) from your review? Less

Aperture Science

Do you like cake?

2 Answers

yes.

Yes, but i know for a fact that the cake is a lie

Defence Research & Development Organisation

Why do you want to work for DRDO

2 Answers

blah blah ......

because it provide me a pathway for long distance

Amazon

What was the time you had to follow the group decision you disagreed with? What is the most innovative research worked on? What was the impact?

2 Answers

The onsite interview was very very long. 5 interviews which took an hour each.

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IMC Group

Come work for us please

2 Answers

yes

From this way of hiring people the company doesn't sound professional at all, if all that it takes is knowing the director and having dinner with him. Less

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