No technical questions. All about previous work experience and some details on what have been done. Interviewer dug very deeply on related works for about one hour. Not a hard one but no further progress with no reason.
I applied online. The process took 1+ week. I interviewed at Lingjun Investment (Shanghai, Shanghai) in Sept 2025
Interview
The first round was an HR interview, where they learned about my educational background and career development plan; the second round was an interview with the team leader, which mainly focused on my past internship experiences and the details of what I accomplished; the third round was a technical interview, which was divided into two parts: IT and math.
Interview questions [1]
Question 1
What is topological sorting? Given a connection order constraint (for example, b must appear before c, and e and f must appear before a), output a feasible sequence of events; Then, identify all possible sequences
I applied through an employee referral. The process took 1 week. I interviewed at Lingjun Investment (Beijing, Beijing) in June 2024
Interview
2 rounds of written exams+1 round of interview
The first round of written test is Quant's unified written test questions
The second round of written test is a project, and factors are calculated based on the given data
Interview questions [1]
Question 1
1. A series of problems in linear regression, such as doubling the number of x values, how will the overall R2 change for the t-value of beta1 after regression?
2. Why are the factors in the interview mathematics and resume, as well as in the project, constructed in this way
