Ho presentato la mia candidatura online. La procedura ha richiesto una settimana. Ho sostenuto un colloquio presso Two Sigma (New York, NY) nel mese di ott 2023
Colloquio
Just finished the OA. there were 3 questions, last one un-scored. The first question was about linear interpolators, the second about data analysis which involves fitting linear regressions. The third was an extension of the second and essentially asked you to approximate a large number of linear regressions.
Domande di colloquio [1]
Domanda 1
Q: given an array of 2d points and an x-input query, return the corresponding y using linear interpolations.
Discuss in an hour on how to predict house price starting with a initial dataset. Back and forth as the discussion go deeper. Discussed model choices, variable selection, and model validation, etc.
Domande di colloquio [1]
Domanda 1
predict house price starting with a initial dataset
Ho presentato la mia candidatura online. Ho sostenuto un colloquio presso Two Sigma
Colloquio
OA: Three coding questions (Linear Interpolator, Linear regression of daily temperature by town, Efficient fitting of linear regression)
3 Technical Interviews (1 hour each): 1. Data Analysis; 2. Coding and Algorithms; 3. Domain knowledge for Phd or Core Statistics
Final round with 2-3 hiring managers and a senior manager from matched teams: combination of open-ended technical problems and behavioral questions
Purely behavioral round with HR team and a recruiter
Domande di colloquio [1]
Domanda 1
First round technical interview: begin with some questions about stats/probability knowledge, and the core is an open-ended case study
Ho presentato la mia candidatura online. Ho sostenuto un colloquio presso Two Sigma
Colloquio
Three Technical:
Data analysis
- Approach to open-ended problem
o Paper, pen
- Ask interviewer if stuck
- Systematic manner:
o Creative ideas
o Technical proficiencies
o What sort of datasets
o What sort of features
o Technical / methodology
o Start with linear model first
- No code
Algorithms
- Hackerrank
o Short, simple and clean code
Core statistics / domain expertise
- Bachelor / Masters – core statistics
o Linear regression
o R^2
o T-stat
o How they are used
o Statistics foundation
- No code
Two more rounds of intern / hiring managers:
- Mainly technical, some behavioral
o Similar to data analysis
o More targeted towards their team
o Come prepared with questions
If well, 30 min technical interview:
- Logistical interview
30 min of senior meeting with Two Sigma:
- Cultural fit
o Behavioral mainly
o Maybe 1 technical
Team match in the spring for more accurate project matching
Tested on foundational knowledge
