I applied through college or university and the process took 5 weeks - interviewed at TWO Sigma.
Interview Details – Submitted my resume at a career fair. Got email a month later. Had a code challenge and a phone interview.
Interview Question – questions on data structure, design pattern, floats and threads. Answer Question
I applied online and the process took 1 week - interviewed at TWO Sigma in November 2013.
Interview Details – Applied online, and HR contacted me and give me the link of the online code test.
Interview Question – The code test, they give you 4 test case, which is regular format. But there is a button for additional 20 test case. They are hidden the content of test case. I always failed two of them. and didn't know why. So I cannot improve my code. View Answers (2)
I applied online and the process took 2 weeks - interviewed at TWO Sigma in July 2013.
Interview Details – You will be given a code assessment, and have to finish it in 2 hrs. But you can choose the time you want to start, and email the solution back in 2hrs. The question is not difficult. And then you will have a phone screen, and you will be asked some question about the projects on the resume, and some technical questions. I was asked several questions about OS. The final round will be onsite interview, but I didn't perform well in the phone screen, so I don't have that chance.
Interview Question – How to compare two doubles in C++? Answer Question
I applied through a recruiter and the process took 2 months - interviewed at TWO Sigma.
Interview Details – Got a mail from the recruiter who then set up a phone interview. It wasn't technical, just what I like and what I don't like. Why I'd like to work at TS?
Then there was this technical interview over phone. Where you had to solve couple of programming problems. If you have good experience with Data Structure and Algorithms, you should pass that round easily.
Then there was onsite round. It consisted of 5 interview. It was a bit different from other tech companies in the sense that each interview was 1hr30mins. In other tech companies, it's usually 45 mins per interview. They asked lots of technical and behavioral questions. You are given a laptop for coding and white board for discussion your ideas. The interview questions are similar to other giant tech companies, however they ask more mathematical questions.
Interview Question – I am not supposed to share interview questions. Answer Question
Very Difficult Interview
I applied online and the process took 2 weeks - interviewed at TWO Sigma.
Interview Details – The interview is very technical; studying the CLR algorithms book in advance is the best route to take before submitting your resume. There is typically a screening interview by HR just to find out if the candidate is a good fit attitude-wise, followed by a code test and then potentially two days of in-person interviews. HR will send a candidate home early in the day if the interviewers don't think the candidate is a good fit for the position.
Interview Question – I don't remember a specific question, and even if I did; I don't necessarily think that posting it online is positive thing to do for the candidates or the company. As I mentioned above, studying the CLR book is the best route to success. Answer Question
I applied through a recruiter and the process took 4+ weeks - interviewed at TWO Sigma.
Interview Details – Had a code test followed by a ph interview and a full day of tech interview. Code test questions same as mentioned before - sorting strings and numbers in place, data center sync problem. phone interview was ok, just a chat about the past project and simple questions. Onsite questions were tricky and covered data structures, algos, string matching, tries etc.
Interview Question – sorting strings and numbers in place, data center sync problem Answer Question
Very Difficult Interview
I applied through a staffing agency and the process took 2 months - interviewed at TWO Sigma.
Interview Details – I initially applied through a headhunter. The process began with an HR interview, which mostly asked about my background and why I was interested in applying. The HR interview was followed by a timed coding test that, if I recall correctly, had a 2 hour time limit. The test can be taken in Java, C++, and another language that I'm not remembering; it wasn't particularly difficult, and I didn't need the two full hours to complete the two problems.
The next step was a full day of technical interviews. I met with seven or eight people from different teams over the course of the day, and all of the interviews were technical. I mostly solved problems by writing on paper, but later in the day I wrote code on a computer as well. The day ended with a meeting with HR, who outlined the offer process.
Next was a series of phone calls with different team members in order to help me make a choice between the two teams I was being considered for. Once I chose a team, the formal offer was extended.
Interview Question – An interviewer asked me to intuitively walk through basic market concepts, ending with an intuitive definition of "beta," despite me having no finance background. Answer Question
Reason for Declining – While Two Sigma was my favorite out of the offers I received, locational constraints prevented me from accepting the offer.
I applied through a recruiter and the process took 1+ week - interviewed at TWO Sigma in January 2013.
Interview Details – Get interview by a recruiter, first phone interview wish HR. Then a coding test for two question in 2 hours, follower by a tech engineering interview. No coding on that interview, just small question like what the difference of process and thread.
Interview Question – No coding on phone screen, just small question. Answer Question
Very Difficult Interview
I applied through a recruiter and the process took 2+ months - interviewed at TWO Sigma in December 2012.
Interview Details – 15-minute phone interview with HR, then 1-hour phone tech interview. Phone interview was not difficult. Questions covered basic data structures, multithreading issues, memory hierarchy, etc. Easy C++ questions and one trivia stumper. It's been seven years since I took a class covering any of these things, and it was still no problem whatsoever.
Hence, I did not study as much as I should have for the on-site, which was rather the opposite; expect math problems, algorithm questions, coding, compiling, etc. on a computer, design-patterns, & advanced C++ questions. I was underprepared, and did not get an offer.
It looks like a fantastic environment; I would not have hesitated in accepting an offer.
Interview Question – Design-pattern implementation Answer Question
I applied through a staffing agency and the process took 3 weeks - interviewed at TWO Sigma in April 2012.
Interview Details – Overall, the experience was good. They gave me a gift bag when I arrived at the hotel. The interview process was long. I was interviewed for four hours in the morning, and then went to to lunch with two of their employees. In the afternoon, I met another two people and then it was finally over after talking to HR. But the confusing part is some interviewers are not professional, which made me really want to leave as soon as possible since I have got an offer from another place.
Some of the interview problems are as follows:
1. how to compress a prefix tree?
2. roman to int and int to roman
Interview Question – how to compress a prefix tree? View Answers (2)
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