One of my coworkers and I often joke about how we'd never pass our current hiring test, and yet we're among the highest paid and most productive people at the company. I've expressed this to the hiring manager and he still thinks it's a good approach. They have literally said they want more people like me... so they brought me into the hiring process, but I disagreed with them on almost every candidate, so they brought me back out of the hiring process. Some people don't know what they want out of interviewing a candidate, they just go with the status quo interview and assume they're going to feel good or bad about someone based on their results.
If you onboarded in a time before this, or you aren’t practicing for an interview, it is very likely you wouldn’t just pass the interview, like you wouldn’t likely pass a physics college exam right now even though you did when you were in school.
Nevertheless, I gave the interviewer a detailed, step-by-step, golden answer she was looking for, and she's obliviously impressed. After a few minutes, however, youthful stupidity^W^Wmy integrity got the better of me and I told her that I'd seen the problem before. So I got a 2nd trick problem, one that I didn't know nor studied for, and naturally didn't arrive at the golden solution.
I didn't get called back.
If you were to ask me to solve a problem that's on my study list today, believe me that I've got the selling part down pat now.
And everyone is doing this now, it just isn’t a certain few bad recruiting agencies and applicants. Heck, even the good applicants (the ones that you want to hire anyways) have to do it to get through the loop.
They had the project all setup and ready to go. All I had to do was fill in some of the more complicated bits (hooking up to the database using LINQ to SQL, and implement some queries to search by name/album and two or three other fields).
Then display them in a certain order.
I was given an hour to do it. Apparently, after I was hired, I was told I was the only one they interviewed that could do it. Ironic part was I'd never used LINQ to SQL before and had studied it the night prior. (It was on the job posting)
The test was a JSFiddle pre-filled out with Angular boilerplate. It had comments in places where things needed to be added and filled out. Just to be clear, there was no gotchas or tricks involved. It was very simple: "get JSON from this public HTTP endpoint, display it on the page in a table and then add a filter field. If there's time, add some CSS to make it look pretty."
Candidates were encouraged to use docs and Google if they couldn't remember off the top of their head how to do those. More than one candidate copy/pasted from Stack Overflow during the interview and while I wasn't impressed, I didn't count it against them.
Several candidates completely failed at it and I suspect it was a combination of nerves and lack of experience (one candidate it became clear that he had never used Angular before and he never got past the "get JSON from an HTTP endpoint"). During the test, I was more than willing to talk through the code with them and help them figure out the best way to do it. The one candidate who passed it was hired and they were very successful at the company.
The commenter did say it was mentioned in the job listing.
If the listing just said "LINQ-to-SQL knowledge a plus" but then gave you a test that actually required foreknowledge of it, then that's kinda shitty.
I've used this in the past. But, I don't ask for actual code. I'm using it to see the candidates thought process.
More important than any psuedo-code is how well they communicate what they are thinking (whether that be trough writing on the wall or conversation). Can they break the problem down into workable pieces? Do they ask questions about the requirements? Do they try a simple solution and iterate on it? They they get hung up on small details and miss the bigger picture?
Another neat one I was shown was, as a whiteboard test, was to write down all the letters, A-Z, then come up with the name of a command for each letter. It's a double-sided test -- it shows your ability to respond quickly, how you respond, and the ability to back up your responses.
Of course, joking questions like "vi or emacs?" can be good as well to see a candidate's character as to how they respond to technical inside jokes like that.
It's testing more than just rote memorization. You also have to explain any commands you write down, what they do.
That might be OK for someone with, say, <2 years experience out of college. But for anyone mid-career or higher, it comes off as silly and condescending, and as not exactly a good use of their precious, irreplaceable time. And more to the point, conveys the exact opposite of the message you should be sending: that you know they're smart and intellectually self-sufficient, already. And that it's up to you to win them over, and convince them that you're worthy and interesting, and that they should jump over, and join your mission.
More important than any psuedo-code is how well they communicate what they are thinking
It's not a test of technical skills. And you'd be amazed at the number of resumes that signal somebody can have a quality discussion about technical problems, but the candidate can't communicate for shit.
You know, it just might be... the interviewer who's not so hot at communicating.
Or is "communicating" okay enough, but following a template that's broken to begin with - and pretty much designed to make candidates feel alienated - or at best, highly unenthused at the prospect of playing along with.
Obviously that is an example of a low-stress interview. When the candidate was stuck I gave hints, and the whiteboard portion was only intended to last 10-minutes. It was also only 5% of the feedback I gave. The majority was comments on candidate's knowledge and experience.
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That's definitely how I'd like my whiteboard interviews to go. I've experienced the back-to-back grinding interviews of softball problems to write in syntactically correct code. Getting dinged for errors and even getting a close but wrong answer is a pain in the butt. When you write a program and realize it's wrong at the end, the question, "What do you think the right answer is?" is frustrating. I can't say, well, I wish I had 30 minutes to start over. If you tell me the answer, we can talk about why I was wrong.
Those interviewers have been engineers peeled off of their daily projects though, so I can't say I fault them individually.
If you had that attitude during one of my interviews I'd show you the door.
I can't begin to count the number of impressive resumes that lead to unqualified candidates.
And with that attitude on your side -- "if this isn't going well, then by definition, it's the candidate's fault" --- let's just say we're clearly not match.
I can't begin to count the number of impressive resumes that lead to unqualified candidates.
Ditto for job ads leading to unimpressive companies with obtuse interview processes.
Interviews are naturally awkward.
As currently conceived. So maybe it's time to start thinking about them differently.
Also, I think you’re somewhat confusing whiteboarding and being interviewed by an egomaniac. If someone is a total jerk, I imagine any interviewing methodology will suck.
> - Okay then, show us a personal project or some work you've done in your free time. (What, so I'm expected to live eat and breathe code 24/7 to get hired?!)
I have software I can show off to potential employers but I didn't write it for them. I'll admit that I got really lucky to both enjoy coding and to have the privilege to so, but I didn't have to give up my life in order to get it done. I play video games many more hours per week than I code outside of work.
If I had to choose between otherwise equally qualified mechanics, I would tend to prefer the one with a hobby car at home.
Dealer service departments always fail this test. They will never tell you that it is not necessary to do a repair. Some will even say "I don't feel comfortable letting you drive it off the lot like this." Then you take it to another mechanic that says, "Yeah, this might affect your fuel economy by a tiny amount. I wouldn't worry about it in a car this old, unless you plan on moving to California."
It isn't merit based, but it's hard to argue that it favors one candidate over another! And maybe it's mimicking the effectiveness of your current system!
How about sticking with standard phone-screen/on-site process, but emphasizing writing real code, on a computer, solving realistic software engineering problems? I've interviewed at several companies (including one of the "big four") that took this approach and found it was the best overall balance IMO. You get evaluated in a more realistic setting than a whiteboarding interview, but takes the same amount of time an also doesn't depend on "side-projects" or "take-home" assignments.
Some general examples from my own experience:
- Here's a poorly-written / buggy program: Find the bugs and do some refactoring
- Here's a loose spec for a small program: Spend an hour designing & coding it up (on your own, no one looking over your shoulder the whole time), and then walk through it with the interviewer AFTERWARD and explain your design / answer their questions about it.
Gauging someone's vast, claimed experience in some language or technology can be tricky, but if they can't explain what a rebase is, or how maven dependency management works, or how SSL works in general terms, it tells me a lot about what kind of technologist they are.
Side benefit #1 is you get a sense of what they think is important
Side benefit #2 is you find out if they can accurately gauge how well they know what they think they know
Side-benefit #3 is you might learn something new!
That said, never forget that ultimately your filtering criteria leak, and candidates will begin coming in with knowledge JUST about that, because you care.
Furthermore, you’re currently optimizing for trivia obtained in CS education that skilled programmers from other STEM fields and non-traditional backgrounds will lack. Besides people directly working on SSL, very few people need to know about symmetric encryption schemes at any practical level, and at best remember it at the same level I just stated it at, as a factoid. So you’re going to mostly find people who’d know that factoid and who’d remember that factoid; put another way, canned-answer spouters.
https://wiki.mozilla.org/Security/Server_Side_TLS#Modern_com...
If you used git, you probably even did a rebase. Or at least tried to. Or at least saw it as an option.
These aren't obscure university topics.
I'm sure each language/technology has a small list of universals that experienced practitioners should be quite comfortable with. Of course there are exceptions, it's not perfect, but my point is that these things are a good proxy for estimating overall competence level.
And just to be constructive: you have a nugget of a good idea, that a technologist should have fairly detailed knowledge in some domain of interest. Finding what those areas are and getting them to speak about it beyond a superficial level of detail might be a good hiring criteria.
I'm an electrical engineer, and I've never been asked to design something from scratch in an interview. I have been shown existing design drawings or products and asked questions about them, which leads to various discussions. What we do in interviews is talk, both about what the company works on and about what I've worked on.
In any given specialty, I think good developers will pick up the stuff around that specialty. Java devs will learn about Maven and git and maybe some JVM customizations to tweak memory usage. Rails devs will learn about which gems are widely-used to solve specific problems, and git, and maybe some devops/deployment stuff with SSH keys and Capistrano.
The particulars matter less than that there's some amount of holistic knowledge of their specialty. Of course one can argue the specifics (what if they've used svn but never touched git, etc)... but if there are no specifics -- if the candidate only knows their specific language of choice but nothing outside of it -- I would argue that they're probably not that great.
The best way is probably a mix of some of those. Yet, I have no idea what mix :)
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As a hirer, you really can't win. There's not one hiring process nor guiding principle that doesn't seem to bring out the pitchforks of those who were frustrated, disrespected, or rejected by said process:
- Show us your open source work. (You're excluding all but a lucky few who have the privilege of writing open source code!)
- Okay then, show us a personal project or some work you've done in your free time. (What, so I'm expected to live eat and breathe code 24/7 to get hired?!)
- Well, how about a short contract/work sample? (How am I supposed to find the time to do that? I have a day job and a life!)
- Shall we try whiteboarding/coding tests then? (This is so insulting! Solving CS puzzles isn't what the job is about!)
One cannot, sadly, rely on the résumé. I have interviewed multiple self-deemed "experts" in such-and-such language, only to find that they could not even write a basic for-loop on the whiteboard.