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Engineering Trainee Interview Questions

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Quantitative Researcher Summer Intern at Jane Street was asked...

Apr 17, 2011
 2) A. 10 ropes, each one has one red end and one blue end. Each time, take out a red and a blue end, make them together. Repeat 10 times. The expectation of the number of loops. B. 10 ropes, no color. All the other remains the same.7 Answers1/10 + 1/9 +...+ 1 ? B is similar..1/19+1/17+etc in BE[n] = 1/n + (n-1)/n*E[n-1] = 1/n + E[n-1] For the case of n=10, you would sum up all of the numbers from 1 to 10: 1/10+1/9+ 1/8 + 1/7 ... + 1/2Show More Responsesadd an extra 1 to the previous answerFor part A), the answer is 1+1/2+1/3+...+1/10. For part B), the answer is 1+1/3+1/5+...+1/19. Explanations: For part A), ctofmtcristo has the right approach but with a typo in the equation for E[n]. To obtain the expected number of loops, we note that the first red has a 1/n chance of connecting with its opposite blue end (and forming a loop) and a (n-1)/n chance of connecting with a different rope's blue end (and not yet forming a loop), so E[n] = 1/n*(1+E[n-1]) + (n-1)/n*E[n-1] = 1/n + E[n-1], with base case E[1]=1. Then, by induction, we get E[n] = 1+1/2+1/3+...+1/n. Part B) is similar. We note that the first end now has 2n-1 possible ends to connect to, of which 1 of them is its opposite end and 2n-2 of them belong to a different rope. Then, E[n] = 1/(2n-1)*(1+E[n-1]) + (2n-2)/(2n-1)*E[n-1] = 1/(2n-1) + E[n-1], with base case E(1)=1. By induction, E[n] = 1+1/3+1/5+...+1/(2n-1).Ed's anwser is not right. Just check for the case of 3 pairs. So total cases is 3!=6. 1 case with 3 loops, 2 cases with all wrongly attached, and 3 cases with 1 loop. so expected value is (3/6)*(1) + (1/6)*(3) = 6/6 = 1... and Eds anwser gives 1+1/2 +1/3 = 11/6, which is wrong clearly.Timi, you are missing the fact that if they are "all wrongly attached" then they form a loop. Similarly, the case you are thinking of "with 1 loop" actually has 2 loops. The correct answer is still 11/6.

Mac Specialist at Sealed Air Corporation was asked...

May 17, 2010
 Do you see yourself as a Mac or a PC and why?1 AnswerI see myself as a mac because I am alive and enjoy life.

Senior Consultant at Sogeti was asked...

Dec 11, 2012
 I did not have any difficult questions - but I have since done a lot of interviewing for Sogeti, and I do ask some difficult questions. Here's one: What analysis and modeling techniques and methodologies have you found to be the most effective, and why? 1 AnswerI want to know if my candidates are actually trying to follow the guidelines for a Business Analyst or are just out there flying by the seat of their pants.

Coordinator Position at Fuse Television was asked...

Jul 14, 2012
 Not many difficult. I would say some things were unexpected for me. Such as asking about my college experience (been out of college for some time).1 Answerwas pretty honest. talked about some teachers I liked and college courses.

Field Engineer Trainee at Schlumberger was asked...

Jul 5, 2014
 can you live together with men/woman while working?1 Answerthey are professionals yes i can

Cashier/Front Desk at Tan Etc was asked...

Oct 10, 2012
 There is NOT one difficult question that you get from them, only one i got stuck on was "If you could improve on anything what would it be?"1 Answeri can't think of anything at the moment but there is always room for improvment

Project Engineer Trainee at Cupertino Electric was asked...

Mar 10, 2011
 How would you wire this conference room1 AnswerBring a full "boat" of 3 phase power in, use 2 phases for plugs, one for lights. Use MC cable to jump to plugs...

Feb 7, 2015
 Basic operation on Boost Converter1 AnswerSketched and explained on and off modes and CCM DCM etc..

Engineering Management Trainee at Nestlé Purina was asked...

Dec 14, 2013
 Why should I hire you?1 AnswerI messed this up. Definitely the worst part of my interviews. I should have had an answer for this, but I had never been asked it before. Only 1 of the managers asked me this.

Software Engineer - Trainee at Tata Consultancy Services (North America) was asked...

May 14, 2011
 What are the steps in the Software Development Lifecycle (SDLC) and what are the differences between the Waterfall and Agile development processes?1 AnswerSteps: Requirements, Specifications, Design, Implementation, Testing, Deployment, Maintenance. Waterfall development is a highly structured process that requires completion of the previous step before advancing to the next one. Based on the idea that bugs found later in the process will be more costly. Agile development breaks down each problem into small incremental short term tasks. Emphasis is put on face to face daily meetings
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