• Failed codility test

    Failed codility test

    If you have reached the online aptitude reasoning tests stage with Lloyds Bank then this information could be useful for you. I have posted information on several recruitment tests as I have applied to many graduate programmes since last year. I hope you will find it useful. Lloyds will require you to take 2 online reasoning tests, namely, Numerical Reasoning and Verbal Reasoning tests.

    These are administered by SHL. The Numerical Test consists of 18 questions with 18 minute time limit. The level of difficulty varies and proper preparation using tutorials is a must! I think the best place to learn how to get a top score is from GraduateMonkey just google the name. You will need to look for SHL type tutorial they have.

    On the downside, their Ebook is available online only although their tutorial videos are helpful showing shortcuts, etc. It took me 3 days to prepare using their material and I got 80th percentile on my num. Hi Mate, thanks but you forgot to mention about the Verbal reasoning test of lloyds bank. It is 30 questions and 19 minutes as far as I remember. The verbal test is an easy one but the numerical is a bit challenging for dummies like myself.

    What is graduatemonkey, is it a new test provider by the way? Do they provide video tutorials also? Are you promoting GraduateMonkey? The answer is NO. But at least I am not asking useless and stupid questions, mate! I have added useful and practical information for test takers. I just turned down an offer from Lloyds in favour of Deloitte! How long did it take for you to hear back from them after you did the online tests? For the verbal test, practice at assessmentday.Two things: a.

    No, you're probably not a bad programmer.

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    Companies who recruit solely based on codility type questions are How do I put it? Not smart. Learning things like analysis of algorithms, data structures and other computer science fundamentals is useful, even if you might not use them directly, they will influence the way you think. It is never too late to start and given an open mindset, willingness to apply oneself and consistent practice, it won't take long to understand the basics of computer science.

    Thanks for the link, I've not seen a book that deals in algorithms that didn't assume calculus knowledge. My CS education wasn't exactly MIT or Stanford, so this should help plug the holes left by my university and shameful lack of curiosity years ago.

    Thanks again! You can lookup stuff on the web. You can also use an IDE. For the codility test you need preparation. The problems are not easy and the problem setters underestimate how long it takes to solve a problem.

    Unless you're regularly participating in coding contests etc, you will not make it. The way we program day to day, and in a timed test env are different. You should not feel bad. Sorry to hear about your experience with brainteaser coding interviews. They really are not a true test of your abilities or value as a developer. From personal experience the people who tend to do well on those questions have just practiced that discrete skill a lot and may or may not actually excel on the job, and lots of people who bomb these interviews turn out to be amazing developers.

    Take the example of the guy who wrote homebrew but didn't get hired at Google because he flunked a question about trees. That's why at Lytmus we've created a way to interview with real world coding projects. We spin up VMs with full development environments where companies can ask you to do the kinds of things you actually do on the job instead of inverting binary trees and what not.

    Would love to get your thoughts as a candidate who's frustrated with current interview processes, we have a demo available on our home page www. I also had an interview stage on codility.

    Don't feel bad. But some companies want you to solve some random hard codility puzzle in 30 minutes or else you are no good. It's a decent enough way to filter out obviously bad candidates without eating up your time which is a big deal for small teams. I've used Codility for interviewing and being interviewed before and thought it was fine. I didn't say it was a fault with codility. Some companies, like your's, use it in a sensible way.

    Codility Demo Test

    But I think there are many companies which use this tool the wrong way. Anything except the easy level takes more time for someone who doesn't practice these kind of challenges every day.

    Yeah, I'd always take the points you mentioned into account when reviewing a solution.The thing I never understand about those tests is, are they testing math or programming? Programming mostly requires skills that go far beyond the mere ability to crank out algorithms to solve abstract math problems. I think there is a niche for somebody to build a developer testing service that is more rounded out, that seeks to test for skills such as code quality, architecture, breadth of experience, etc.

    Implementing such test might be technically and logistically more challenging, but any effort that goes some way towards these would be worth it.

    Doing a Test With Codility

    There are some coding sites that detect algorithm time and space complexity. Its tough to automate measuring code architecture, like if the task if appropriately divided into functions that compute individual parts, whether its aptly named, comments where code is less clear etc.

    Thats where a good interviewer comes in. In what real life programming context would that come up? I've never seen a problem like that in 36 years. Successfully sending a transaction through a payment gateway API or moving a WordPress site to a different domain would be more realistic.

    On the one hand, I agree with you. I've never had to solve a program like this and I doubt I ever will. On the other hand, I do understand the theory behind asking it in an interview. Imagine that you're interviewing a prospective player for a football team. As a test, you ask the player to climb a single flight of stairs in a minute.

    Now, this is obviously a stupid test. There are no stairs on a football field. David Beckham never won a game by being the first guy to the top of a flight of stairs. No play will ever involve the player climbing stairs.

    failed codility test

    Yet, despite all that, I wouldn't hire someone who, after sixty seconds, was only sitting half-way up the stairs, panting for breath. Now, whether the primes problem is similarly a trivial task that any competent program can effortlessly solve is a matter for debate. Actually I was able to solve it later in under 30 minutes.

    But the pressure at the time of interview was kind of preventing me from thinking clearly. I solved 3 fairly hard questions within an hour, taking only 20 minutes to solve one question on average.Codility Limited is based in London, UK. Once solution is submitted Codility performs range of testing on the source code and try to evaluate which canidate solved the problem in best way.

    Normally you can write the soultion for interview test under 20 lines of code but if your algorithum is not robust then it will fail the Codility test. During validating the source code, Coditiy internal application will test your program with both valid and invalid data. On top of that it also measures how long your algorithum is taking to process large amount of input. Normally during test you can see the requirement for Bio O notion on the screen such as O 1O N etc.

    The good thing about codility is that candiate can use the language they are comfortable with. Now you must be wondering why i am writing about this company. Well during one of my job interview i was asked to do online test on Codility website, I thought that it will be multiple choice question and it will be very easy to pass the test. Once i reached home, i opened Codility website and decided to try few of their sample questions.

    For one of their sample question i was not able to understand the question so i skipped to the next one. Well next question i understood but i did not realized that i will be tested on speed of my algorithum. So i started writing code for sample test in Java, it was so difficult to write code on their browser because it breaks all the indentation and curly brackets; are placed on the wrong places.

    Well after finishing the solution i submitted to see my result. Guess what? The test result failed me on timing. On that night i could not sleep, i felt like i am hopeless and not able to write simple line of code. Next day i asked one of top student of my class to try sample test and he failed in timing test as well. I was really scared that i will not get face to face interview with this company.

    But anyway i decided to try the actual test whose link was emailed to me. Before starting my test i opened my java IDE and clicked link to begin my test. My first question was to reverse a String, i was so happy after looking at that question and finished it quickly.

    But since i was scared,i started testing my code with different data.

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    And i was supposed to handle String of lengthcharacters. It took me rougly 10 minute to plan how i am going to solve the problem and i came with following algorithum.

    failed codility test

    I prefer to be tested by humans rather than machines because i can explain to humans what i am thinking and how i am going to solve the problem. Every one says that they are punctual on their resume but on the very first day of their job they are late. Yes i managed to pass the interview and i am working as Ruby developer at the moment.

    How was your codility test? It will return true.Two days ago I was called by an employer offering me a job as a Developer. After having a quick phone interview, she told me that they need to test my programming skill that I can do it at home. To my surprise, this site offers exactly what the companies who in search for programmer and need to ensure their basic programming skills.

    We can look at how the test work by doing the sample test accessible from the homepage.

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    The interface are nice, we can even choose our langauge of choice with the same given problem. The Help screen is intuitive. The IDE is enough to write a solution. And we can verify our work againts the default test case that in used in the instruction and our own test cases.

    However, in the real test, our result report will not be shown. So, these are some tips I want to share when working on codility as a testee:. I found my own drawback that I must improve such as:. Companies had very different styles in testing the recruits.

    Some form of tests I have had includes each in different occasions :. After checking with the included original email, I was surprised to know that the said infringed materials are the questions from the screenshot of the workspace of the demo page was image 1 and from the result page was image 2I never thought about that before. This would be a new lesson for me.

    For the reader who wish to take a glance about the workspace and the result page, I recommend you to try it in their demo pages. Good luck for the interview. I did my codility test last month and got the job.

    What questions were u asked. I have to do one again, and will do better this time.

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    But it seems to me a very artificial, unrealistic test of your ability as a software engineer. Real life problems are more likely in my experience to be about how to achieve a secure database connection in legacy code, or just to tie down accurate specs from a Product Owner.

    I will do mine tomorrow, If you have done your, Chris, can you please share your question with me? I really appreciated it. Hi, I have to give my codility test in the comming week, so can you tell me what type of question were their for you.

    How much does it take to get our results. But not otherwise. I agree with AB. Not to mention some of the questions are stuff from High school math and rather redundant. Amazon, Expedia, Zillow and even a few startups had better simple 30 minute questions than Codility that tested knowledge on actual fundamentals I need throughout my career.

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    Just took a test with them for a gig. The only negative would be the questions are easier to understand if you have a good math background.

    After I finally figured out what they were looking for the coding was simple. I plan to run through all of their example questions in the future since they really make you think with a different part of your brain.Firstly we will prove the statement 1.

    In all the following discussion, we assume the slices have two or more element. Hi, I wrote a C version of answer according to your python version, however, I only got score of 90 one test failedwhile yours got I cannot see any difference between my C code and your python code. It is because of the accuracy of float number. And you will get Some accuracy is lost in these conversions. You also will get everything right.

    Hope it would be helpful! And your comment is great motivation for me to continue this blog! Thanks for the insight! I would never reached the conclusion that the array most have 2-orsized slices with MA.

    Your proof nailed it, great thinking! Yes, the solution does nothing with the prefix sums. And I have no idea, how it could be applied here. I am also bothered by this issue. If someday you find the prefix sums solution, please do tell me!

    I guess the implication from the Codility question is to use a prefix sum to do fast average calculation. Great work Sheng! Well, your method to calculate the average is brilliant.

    But what to do after that? How could your reduce our trying count for these slices? Exactly this method is nice.

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    I also assume codility wants something with prefix sums but I stuck that I need inner loops for j index! But it conflicts with the condition that, the MA is known as the global minimal average for all slices. Can you try clarify a bit? Hello, thanks for visiting my blog!

    But in my bad example, [1, 2, 3, 4, 5] does not hold the global minimal average. A better example would be [1, 2, 1, 2, 1. The slice [1, 2, 1. But for [1, 2, 1, 2, 1. In other words, it is possible to have different averages for different sub-slices of one slice. For [1, 2, 1, 2, 1. So for [1, 2, 1], every sub-slices is with same average.

    So even for slice [1, 2, 1, 2], all of its sub-slices hold the same average. Just stumbled on this blog looking for a solution.I got codility test today. Thanks for sharing your experience!!! Its helping me alot.

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    Stupid me. Thank you for your description of your experience with the Codility evaluation. I had figured that pulling my own IDE was the way to go. I am worried about corner cases getting in the way of reasonable score and of course recruiters fixating only on that single number. Yeah, f-ck 'em if they can't see past your Codility scores.

    It's a sign from on high that you didn't need to work for the f-ckers anyway. Yeah, just took a Codility test just now.

    failed codility test

    I tried some of the Codility exercises first to warm up. Then took the test. I got a 10 on the second task but an overall score of The recruiter said that if you get between 40 and 60 the team there reviews the code.

    I do have to wonder how much laughing and carrying on must happen at those reviews. Like guys in a fraternity laughing about their time as pledges as they discuss how the current crop of aspirants did during some pledge activity.

    It'd seriously freaking help if we knew what they were testing for I suspect Codility is an evil, vicious practical joke being played on the programming world by testers who are trying to get back at us for making their lives miserable. I recently took a codelity test. I gave up because each of the tests were based on someone that knows the theory from a CS standpoint. I was never a CS graduate. Needless to say. I am tired of the trolling.

    I am going to learn the algorithms just so I can tell them after I take the test and ace it, to fuck off.

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    I will make the test in a day or 2 and while looking around for info found your site. My input is that the usual time a recruiter spends with a CV is less than 1 minute, the probability that a recruiter will look into your test behind the results and check the code is not null Which for example favors devs who don't know of anything better than a bubble sort vs those who know that the bubble sort is not a good solution for a big problem but can't implement any other sort under pressure.

    Well, it happened.

    failed codility test

    When applying for a job, I got sent to a Codility test. And even though I guess I already had some good practice with them, I managed to do badly in stupid ways — ways that 2 years ago I had already thought about and even taken notes on. Just, in the heat of the moment I forgot about those rules of thumb.

    And in fact I think these hints should be given by Codility themselves — because if not you are practically ambushed, even more so if you didn't take the time to thoroughly explore how they work.

    So here are my hints-to-self. The summary is: don't think of this as a coding interview; this is rather about getting something working, ASAP. If at all possible, use a scripting language. My day-to-day programming language for the last few years has been C more concretely, C99 in embedded environments.

    And yet, I consistently get better scores in Codility's tests when using Python, in which I would say I am just a beginner. For example, consider the quantity of mental cycles that in C go into test-wise useless things, like all the type system and its implications: use an int or an unsigned int here?


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