Questions d'entretiens - Technical manager

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Google
On a demandé à un Technical Account Manager...10 janvier 2011

* Given an array of numbers. Create another array that contains * the product of all the members in the array except the current * element. For example, if you have an array of 3 elements such as: * * A[0] = 2 * A[1] = 4 * A[2] = 6 * * Then the resulting array will be * B[0] = 24 * B[1] = 12 * B[2] = 8 *

10 réponses

public class GoogleInterviewQuestion { public int[] computeProds(int[] intArray) { int product = 1; int[] prods = new int[intArray.length]; for (int i = 0; i < intArray.length; i++) { product *= intArray[i]; } for (int i = 0; i < intArray.length; i++) { prods[i] = product / intArray[i]; } return prods; } public static void main (int argc, String argv[]) { GoogleInterviewQuestion giq = new GoogleInterviewQuestion(); int array[] = {2, 4, 6, 8, 10}; int prods[] = giq.computeProds(array); } Moins

More than division by 0, it will fail if any element of original array is 0. All elements of resultant array will be 0? While one element dosent need to be 0. Moins

Or even better: def ComputeProds(arr): return [reduce(lambda x,y: x*y, set(arr).difference([c])) for c in arr] Moins

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Amazon

Given a string like "I'm being interviewed by Amazon" implement a method that reverses the given string so that it looks like "Amazon by interviewed being I'm".

10 réponses

we can first reverse the whole string, and then reverse the individual words O(n) complexity Moins

3-line solution in PowerShell: $str = "I'm being interviewed by Amazon".Split() $([array]::Reverse($str) ) [string]$str Moins

" ".join("I'm being interviewed by Amazon ".split()[::-1])

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Google

you have one giant cube made of 1000 small cubes(arranged them in 10x10x10) if you put the giant cube into the bucket that filled with water, then how many of small cubes are actually get wet?

8 réponses

488. 1000 - (8*8*8) = 488

correct answer is 488 : 2*[10*10 + 8*10 + 8*8] = 488 This accounts for including of cubes with sides viible on 2 or three flat surfaces and eliminates the repeats.. Moins

Top and bottom faces: 10 * 10 * 2 = 200 The blocks along vertical edges = 4 * (10 - 2) = 32; -2 as the top of the line and the bottom of the line are already counted amongst the top and bottom faces. 4 inner faces = 4 * 8 * 8 = 256; 8 as these aren't yet counted amongst the top and bottom faces or the vertical edges. Total = 200 + 32 + 256 = 488. Moins

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Amazon

What is the hardest thing in moving a team to Agile?

5 réponses

It's the people. Getting them to understand the Agile concept, then utilize it. Some developers never get "Fluid Requirements". They want final requirements and that's it. Moins

1. Communication. Frequent communication from the developers to ensure problems are raised and solved 2. Team needs to learn how to ship products with low-pri bugs Moins

- New team (everyone is still forming, norming, storming) so hard to estimate and collaborate - Distributed team members (works best if teams are collocated) - Strong, individual performers. Agile is about team work. - Not having a product owner - etc. Moins

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Google

Estimate the number of spark plugs in the state of California.

5 réponses

In fact the number is much larger than that. The average number of sparks per vehicle (in CA) is probably closer to 5.5. Four-cylinder vehicles are the norm in Europe, but in the US is common to see a higher percentage of V6 and V8 engines. For every gas (not diesel, as noted previously) vehicle in CA, working or not, you could estimate ~5.5 sparks. In addition, you have to account for all stored (i.e. not necessarily installed in vehicles) sparks. So if there are, say, 20k car shops in CA and each of them holds 100 sparks in stock, that's another 2M sparks. How about motorbikes? Probably 2.5 sparks on average? Any spark factories in CA? Finished product would count too. How many unsold/retired vehicles? I'd say the final number is well north of 100M. Moins

Cars, lawn mowers, edgers, and many other engines. Only going by cars is a huge underestimate. Moins

This is a fermi question. assuming there is one sparkplug per vehicle, and the number of sparkplugs used in other machinary pales in comparision to the number of vehicles in california, then you just need to get the ball park figure for the number of vehicles.. here's my shot at it.. CA population is roughly 40 million. I would estimate roughly 1 car per family.. so lets say about 15-20 million cars in CA (taking into account children). so ball park figure of 20 million. lets add 10 million more for commercial vehicles, motorcycles,trailers etc.. . I would estimate a total of 30 million spark plugs in the state of California. Moins

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Amazon

what was most innovative technical work you have done

5 réponses

We have developed Virtual Music Instruments for A.R Rahman. These are musical bands worn to hand and these generate midi tones and sent over Air (two variants Bluetooth, UWB). A third variant is again demonstrated by A.R.Rahman in many concerts, with technology based on camera. All of these variants are used by A.R Rahman in various concerts. Moins

We have developed Virtual Music Instruments for A.R Rahman. These are musical bands worn to hand and these generate midi tones and sent over Air (two variants Bluetooth, UWB). A third variant is again demonstrated by A.R.Rahman in many concerts, with technology based on camera. All of these variants are used by A.R Rahman in various concerts. Moins

We have developed Virtual Music Instruments for A.R Rahman. These are musical bands worn to hand and these generate midi tones and sent over Air (two variants Bluetooth, UWB). A third variant is again demonstrated by A.R.Rahman in many concerts, with technology based on camera. All of these variants are used by A.R Rahman in various concerts. Moins

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Parexel

Quiz: 4 persons need to cross a bridge where only 2 can cross at a time, having 1 torch. A can cross in 1 min, B in 2 min, C in 5 min and D in 10 min. What combination will make them go fastest across the bridge.

4 réponses

A and b, c and d

A and b, c and d

A and D, B and C

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Big Fish Games

How would you explain story points to a team who's new to Agile/Scrum?

4 réponses

Time vs effort.. teams get hung up on time based estimates. And not about the amount of effort it's going to take to accomplish a task/user story. Moins

It’s about demonstrating it to them and comparing the efficacy compare to other frameworks via dissecting a story vertically to the smallest size possible. Moins

I said I would talk to them about t-shirt sizing and try several ways to help them understand that story estimation has little to nothing to do with time, rather effort. I also explained that this was a challenging topic for a new team. Moins

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Twitch

Q: Describe a situation where you disagreed with a superior about a project direction? How did you handle it?

4 réponses

A: I picked an example and described how I would meet with the person directly to find out reasons for the opposition, discuss compromises and ultimately come to some type of resolution. I hate this type of question. I get it. They want to see how you work/think during certain situations. But seriously, this is inane. Moins

No coding questions. System design only at a very high-level.

Actually, in our school in China, the IB DP Coordinator usually is the one assigned as the overall head in any school activity/program celebrating traditional Filipino or Chinese culture. There are times that problems/challenges arise during its preparation. Although the general instructions for the preparation were given, the general outcome does not coincide as planned because other homeroom classes had their own way of doing it not completely following, her general instructions. I had experienced that and the DP Coordinator called for my attention and she had a talk with me in her office. She even reprimanded being her immediate subordinate and a faculty member of the IB DP group in our school. During the time that she was talking and explaining, I kept silent and listened to her. Then after her, I completely and carefully explained my side and interpretation of her general instructions. The result was having an understanding of each other's side that showed respect to one another. Because we both do believe that we are both professionals when it comes to performing our tasks and responsibilities as teachers. How I responded to the situation to our misunderstandings of listening to my superior and airing or expressing my own interpretation showed that whatever challenges that may occur during the process of performing our responsibilities can be handled in a professional manner. I practice the attitude of listening and respecting other's views but at the same time presenting my own interprestion thru a clear and careful explanation of everything. Moins

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Amazon

What is the difference between a risk and an issue?

4 réponses

An issue is an actual problem which is (negatively) impacting your project. A risk is an unknown or potential future event -- can have negative OR POSITIVE impact (yes!) and may or may not occur. Moins

The key difference is an “issue” already has occurred and a “risk” is a potential issue that may or may not happen and can impact the project positively or negatively. We plan in advance and work out mitigation plans for high-impact risks. For all issues at hand, we need to act immediately to resolve them. Moins

This is classic project management professional terminology, which I knew. But since I'm not a PMP I didn't know the precise definitions so I didn't try to bluff it. In the real world the two things are so different that you can't really point out what the differences are. I was left doing a goldfish impression - mouth opening & closing. Moins

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