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Google Businesses IT

The Key To Interviewing At Google 185

Nerval's Lobster writes Wired has an excerpt from a new book of Google-centric workplace advice, written by Laszlo Bock, the search-engine giant's head of "People Operations" (re: Human Resources). In an interesting twist, Bock kicks off the excerpt by describing the brainteaser questions that Google is famous for tossing at job candidates as "useless," before suggesting that some hiring managers at the company might still use them. ("Sorry about that," he offered.) Rather than ask candidates to calculate the number of golf balls that can fit inside a 747 (or why manhole covers are round), Google now runs its candidates through a battery of work-sample tests and structured interviews, which its own research and data-crunching suggest is best at finding the most successful candidates. Google also relies on a tool (known as qDroid), which automates some of the process—the interviewer can simply input which job the candidate is interviewing for, and receive a guide with optimized interview questions. It was only a matter of time before people got sick of questions like, "Why are manhole covers round?"
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The Key To Interviewing At Google

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  • by gweihir ( 88907 ) on Wednesday April 08, 2015 @05:40PM (#49433469)

    In fact, the ones here are far often square than round, so the answer to that question really is "because otherwise they would not fit the round manhole". Second, It took them pretty long to figure out their interview-questions are bogus. I interviewed there in 2008 on the request of a friend that wanted me for his team. Total failure as I knew far too much about the things they were asking me and the ones asking were not domain experts and hence did not understand the answers. In retrospect, that is fine. I now know several people that left Google, because they did not find the company to their tastes at all anymore.

    • You're probably better off. Working for the big Silicon vendors is over rated. You can make a six figure income working for a small firm, as well, without the hype and hyperbole.

      • by gweihir ( 88907 )

        Indeed. I know that from experience now. A small company also has the decisive advantage that you can have real influence on where it is going and how you do your work and when you have some grievance you can talk directly to the one responsible. I quite like that set-up.

      • by sycodon ( 149926 )

        And for being such a "smart" company, their software can be pretty fucking stupid.

    • For the same reason that assholes are round and not square.

    • The vast majority are round and have a lip on them. This makes the manhole cover circumference larger than the actual hole and prevents the cover from falling down the hole. A square manhole cover can fall down the hole in the right orientation. In other words, round manhole covers were designed to reduce accidents.

      Sewer and drainage grates tend to be square or rectangular. Then again these holes are much shallower and usually do not have ladders.

      • In other words, round manhole covers were designed to reduce accidents.

        They are also easier to manufacture.
        Their symmetry makes them less like to warp.
        They are easier to move, since they can be rolled by one worker, rather than carried by two.

      • A Reuleaux triangle shaped manhole will also be impossible for it to fall into the hole. I think there are other reasons besides just the safety aspect of it that makes most of them round. And not all of them are round either.
    • by rioki ( 1328185 )

      But the battery of questions I got where nearly as useless to real work, even though they where actual programming questions. When I interviewed with Google I had around 7 years of work experience designing and implementing software for industrial automation with some focus on compiler constitution. Almost all questions where CS 101 questions, like "How do you implement quicksort?". Although basic knowledge of fundamental algorithms is required for the the work, actual problems are almost always of architec

      • I had a much better experience than you. The questions I was asked were almost all interesting (and the slightly boring ones the engineer apologised for and said they had to have someone ask basic questions). The thing that put me off taking the job was an observation from JWZ on the downfall of Netscape. He said that it started to go downhill when they started hiring people who applied because it was a great place to work and not because they wanted to change the world. Everyone I spoke to at Google (i
      • by gweihir ( 88907 )

        Ah, yes, another one of those. Using Quicksort is a sign of strong incompetence, unless you can tolerate quadratic run-time. Competent people use mergesort or bottom-up heapsort, depending on the concrete situation. (Come to think of it, I may have had that question too and told them so...)

      • by Cederic ( 9623 )

        Almost all questions where CS 101 questions, like "How do you implement quicksort?"

        How did they react to, "By calling the library that implements it" ?

        To be fair to Google, they're one of the few companies that might need to implement a new algorithm because existing ones aren't sufficiently optimal. But then it wouldn't be quicksort..

  • But of course, every single employee who was hired at Google when the standard interviewing technique was to ask pointless brain-teasers is still one of the "world's best and brightest," no doubt? Smartest, brightest, most talented workforce in America? Changing the world, one day at a time?

    Thought so.

  • by Spazmania ( 174582 ) on Wednesday April 08, 2015 @05:47PM (#49433531) Homepage

    The key to interviewing at Google is to drink the kool aide before you arrive. Download and use the core software they make available. If you're not enthusiastic enough about their tool chain to do that, mere competence won't carry you over the finish line.

    Most companies couldn't get away with that but Google is Google. At least for now.

    • I think that's every company. I've learned to always act enthusiastic about whatever company I'm interviewing at because if I don't, they will not like me.
      • by pepty ( 1976012 )
        Being genuinely curious about the business or the tools doesn't hurt either.
      • Enthusiastic, yes. So enthusiastic you invest a couple hundred hours learning their specific tech before you interview, not so much.

    • by swillden ( 191260 ) <shawn-ds@willden.org> on Thursday April 09, 2015 @09:14AM (#49438071) Journal

      The key to interviewing at Google is to drink the kool aide before you arrive. Download and use the core software they make available. If you're not enthusiastic enough about their tool chain to do that, mere competence won't carry you over the finish line.

      (I interview software engineers at Google)

      This really isn't true. I mean, certainly some level of interest and enthusiasm is important, but the interview process doesn't really focus on that. SWE questions are pretty much all technical, about algorithms, data structures and coding. Not to test your knowledge of those topics (Google isn't really concerned with what you know, but with how smart you are) but to see how well you can solve problems on your feet. There is a significant component of the interviewer's report that covers "Googliness" which probably partially covers enthusiasm, but is much more about whether your personality is a good fit for the culture -- are you a nice person, friendly, interested in technology and solving problems, etc.

      • Which brings me to my other complaint: Google looks at how people think "on their feet" to the exclusion of how they think and perform over time.

        I don't know about you, but unless the problem is crazy-simple or something I've seen a dozen times before, I simply don't think in 45-minute timescales. Give me a week and I'll have three solid solutions. Give me a month and I'll have a dozen more, at least one of which is ingenious.

        Give me your 45 minute segment of an all-day interview and as often as not I'll ha

        • There's no doubt that the process is imperfect. In fact, the bar is quite deliberately set so that there are a large number of false negatives (bad no-hire decisions), to keep the number of false positives extremely low.

          As for your particular complaint... I think that people who don't think well on their feet actually won't perform well at Google. Rather than one person plugging away for a month to come up with that ingenious solution you mention, the approach at Google is to get a half-dozen people toget

  • by Anonymous Coward on Wednesday April 08, 2015 @05:52PM (#49433561)

      Probably this was brought to the mind of many people reading the article, so I might as well post it.
    http://www.sellsbrothers.com/posts/details/12395

  • I know! (Score:5, Insightful)

    by zieroh ( 307208 ) on Wednesday April 08, 2015 @05:58PM (#49433599)

    I couldn't resist answering this:

    Why are manhole covers round?

    Because if they were square, they could be turned sideways, rotated 45 degrees, and dropped through the hole. As it turns out, this holds true for any shape with an even number of sides, until the length of each side drops below a threshold that's related to the lip of the hole.

    • I nearly learned that the hard way. As an idiot teenager I picked up a rectangular storm drain grate that was heavier than estimated. It went right into the hole and just about took me with it. It's funny I hear Google doesn't like to hire people who "just want to work for Google", but unless you really had some desire to specifically seek out Google, their interviews would seem really obnoxious. I only lasted a few interviews before it became clear I didn't want it bad enough, but I will say they didn't go

    • Only this? You failed the interview my friend. See this [wikipedia.org].
    • by Xyrus ( 755017 )

      Manholes r round cuz poop r not square.

      Hire meh nao plz kthxbye.

    • Firstly, not all manhole covers are round. I've seen triangular ones in Nashua [google.com] and Japan [greenspun.com], and there are a lot of rectangular ones [google.com] in Italy.

      Secondly, the reason manhole covers are round generally is that during the industrial age the four major machining operations were casting, cutting, turning, and drilling, and since the covers had to be reasonably accurate while being mass produced they were made by turning (ie - on a lathe).

      Thirdly, this is a variation of a "Fermi problem", after Enrico Fermi who famous

    • Actually the answer they are looking for is "hmm, I don't know. Let's google it".

    • OK, that's pretty interesting, I mean the thing about even numbers of sides. Any idea where I can see the proof? My searching didn't yield anything.

      • by vux984 ( 928602 )

        Basic geometry dictates that any regular polygon can be inscribed in a circle.

        The radius of the circle will be the distance from the center of the polygon to any point. And the diameter double that.

        Its pretty self evident (and easily proven) that a regular polygon with an even number of sides will have pairs of parallel sizes opposite each other.

        Its pretty self evident (and easily proven) that these pairs of opposite sites form parallel chords.

        Bisect the polygon through the centers of a pair of chords.

        The l

  • by xevioso ( 598654 )

    The thing is, some of these questions don't seem all that hard.

    How many golf balls fit in a school bus? Well, I could give a ball park figure by estimating:
    The volume of the bus/the size of a golf ball.
    So even if my numbers aren't right, I'm sure the general application is what they'd be going for in an interview, so...
    school bus: 20ft x 7ft x 9ft x12 for cubic inches= 15120 cubic inches.
    If a golf ball is 1.5 inches in diameter (have no idea if this is true) then 10080 golf balls fit in a school bus.

    Now, i

    • You need to add a few more 12's to your formula since we're calculating cubic space. So it's (20*12)*(7*12)*(9*12)=2177280 cubic inches.

    • They'll probably reject you just for using Imperial measures. And rightly so...
    • If a golf ball is 1.5 inches in diameter (have no idea if this is true) then 10080 golf balls fit in a school bus.

      Golf balls can be stored more optimally than assuming a cubical space for each one (for example 1.5" ^ 2). For example, if you place four golf balls as a square, and you place a fifth one on the top in the center, it can sink a bit between the four lower balls.

  • by bobbied ( 2522392 ) on Wednesday April 08, 2015 @06:50PM (#49433965)

    Is not to play.. .

    When they start to reduce the process of interviewing down to a standardized series of questions and tests, they remove the human from the process too. Who wants to work for a company that isn't about HUMAN interaction first, that isn't willing to treat their employees less like interchangeable cogs and more like unique individuals.

    This is the end of innovation and uniqueness for Google, or at least a sign that it's falling out of favor. This is the MBA mindset of trying to remove the variables in the process, standardize on some ill fitting solution in an attempt to be efficient. This means that they won't get innovation because failure is becoming something to avoid, taking risks leads to mistakes that cost money and time. When this becomes the prevailing attitude at a company, that company then becomes risk adverse and innovation slows down.

    The problem here is Google is nothing but a search engine and software development house if it doesn't continue to innovate. It will die like Yahoo, AOL and all the others if it doesn't stop this.

    • When they start to reduce the process of interviewing down to a standardized series of questions and tests, they remove the human from the process too.

      When Google was still human sized, they could trust and rely on HR people they knew personally. Now that Google grew exponentially it's much harder to trust the many HR consultants that may hire some unfit candidates. So maybe in that case, tests and quizzes are the best option?

    • Actually, I suspect there's some good in there somewhere. I have no idea, I've never interviewed there, and never worked there, but being slashdot, that won't stop me voicing an opinion ;-)

      Whenever I've done any interviewing, I've always struggled to 'measure' the candidates in any verifiable way. I guess I just work on the feeling I get about them. However, if I had a nice intranet tool that could give me a few relevant questions to ask them, then maybe I could actually get a (technical) measure of their w

    • When this becomes the prevailing attitude at a company, that company then becomes risk adverse and innovation slows down.

      Maybe that's a good thing for Google. They have ongoing projects to defeat human mortality, create sapient AI, and strap cameras to everybody's heads. They could probably stand to tone it down a little.

    • by swillden ( 191260 ) <shawn-ds@willden.org> on Thursday April 09, 2015 @09:41AM (#49438349) Journal

      When they start to reduce the process of interviewing down to a standardized series of questions and tests, they remove the human from the process too.

      (I do interviews at Google)

      Google doesn't use standardized questions or tests. The app mentioned just provides some decent questions. At least for software engineer interviews, though, the interviewer would be foolish to use a question read from an app on the spot. The Google SWE interview questions are complex technical problems, designed to give the interviewer a chance to watch the candidate solve problems on the spot, and write code. To do that effectively, the interviewer has to know the question well, and to have explored most of the potential answer space, and to have some idea about how different kinds of candidates will respond to it.

      Googlers call the process of exploring the answer space "calibrating" the question, and it's a pretty important and serious process. Generally it starts with grabbing a few other Google SWEs and doing mock interviews to see how they handle the question, and ultimately interviewers like to use the same set of questions with many candidates because seeing how several candidates handle it really nails the calibration down. I have a couple of questions that I have so well-calibrated that I can make 90% of a hire/no-hire decision in the first five minutes. Basically, good candidates blow through the first stages in a couple of minutes, while poor candidates struggle for a half hour. I don't make the hire/no-hire decision in the first five minutes, though, because there are exceptions. Some people just take a while to settle down / warm up, which is cool.

      I suppose you could use an uncalibrated question from an app during an interview and then calibrate it after the fact. I've done that (without the app), asking a question that I haven't already calibrated, then after the interview getting some of my teammates to solve the same problem. It's not nearly as good as going into the interview with well-calibrated questions, though, because you don't understand the solution space well enough to effectively direct the candidate.

      Actually, I just looked up qDroid and it's specifically for non-technical interviews. I had it run up some questions for a sample position, and they actually look pretty good. All open-ended, exploratory stuff, with lots of suggested followups.

      This is the MBA mindset of trying to remove the variables in the process

      FWIW, I'm sure Google employs some MBAs, but I've never met any of them. Google is an engineer-driven company, top to bottom. All eng managers are required to be competent engineers themselves, and for most engineers their entire management chain, up to and including the CEO, is all technical. There are negatives to this SWE-heavy structure, but it's far better than any other company I've worked for (and I've been around the block).

  • "Why are manhole covers round?"

    So that they can maim and kill people as they roll downhill.

  • So, basically, this is the equivalent of SEO for interviewing at Google. Or, in other words, a whole litany of "This would have worked yesterday, but now, DO NOT DO THIS!"

  • by Anonymous Coward

    -the doubleclick of the 2000s
    -shitty UIs created by incompetent neckbeards
    -never ending beta
    -NSAs bitch

  • by Anonymous Coward

    A number of people from my team had accepted recruitment attempts by Google, with my knowledge and support because I couldn't pay them as much and they'd outgrown our technical challenges, and I have roughly a dozen personal acquaintances working there. All confirm that the interview and application review process is so long that by the time Google even discusses salary details or makes an offer, the candidate has usually taken a job elsewhere. So people looking for work who can't wait 3 months or longer wh

    • "This means that new candidates who already have kids, mortgages, medical insurance needs, or even pet food to pay for are unavailable to complete the interview."

      Or it could mean that they tend to hire a lot more people who already have jobs when they apply at Google? If you can't see that your assumption that everyone who applies will be unemployed and unable to secure temporary employment is absurd, then there may be a completely different reason why you didn't get rapidly hired by Google.

  • I recently saw the movie The Internship (http://www.imdb.com/title/tt2234155/ for any who are in the dark about a 2-year old flick that is good for a giggle or two). I actually made the mental note not to ever interview at Google, even in an alternate universe where I was younger and actually wanted to live in the US, etc. I was actually thinking: WTF where Google thinking to let themselves be portrayed like that? Then I recognized a few (or quite a few) traits in common with previous workplaces that I work

  • Yes it's true that round manhole covers can't fall down but there are plenty of ways to make sure that manhole covers with other shapes don't fall down : supports, ties, hinges, proper handling procedures, etc...
    I believe the primary answer is much simpler : because manholes are round, and manholes are round because it is good shape for a human to fit into, it resists pressure well and it is easy to make.

    Additionally, not all manhole covers are round. For example, there are square manhole covers, and they u

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