Citi · Data
Citi Data Scientist Interview Questions & Preparation
Quick answer
A Citi Data Scientist interview combines Citi's 4-stage process — application & tests, video interview, assessment centre / superday, offer — with the technical and behavioural bar for a Data Scientist. Expect Citi to assess common purpose and responsible finance, alongside core data scientist skills like statistics & probability and sql. Prepare data scientist answers framed around what Citi specifically looks for.
How Citi interviews Data Scientists
Citi is a global bank hiring across banking, markets, technology and operations. Its graduate and analyst processes are structured and competitive, combining technical assessment with behavioural and values fit.
For a Data Scientist specifically, Citi pairs its standard assessment with a technical bar focused on statistics & probability, sql, python. Data science interviews test whether you can turn ambiguous business problems into measurable analyses. Strong candidates pair technical depth (stats, ML, SQL) with clear communication and product judgement.
The Citi interview process
| Stage | What to expect |
|---|---|
| Application & tests | CV screen plus online aptitude and situational assessments. |
| Video interview | Recorded competency and motivation questions. |
| Assessment centre / superday | Interviews plus a case or group exercise. |
| Offer | Decision and offer. |
What Citi assesses
Data Scientist questions at Citi
Expect a blend of Citi's signature questions and core data scientist questions:
- 1Why Citi, and why this division?
- 2Walk me through a valuation or financial concept.
- 3Tell me about a recent business or market story you followed.
- 4Explain p-values to a non-technical stakeholder.
- 5Write a SQL query to find the second-highest salary per department.
- 6How would you design an A/B test for a new feature?
- 7When would you use precision vs recall?
- 8Tell me about a time your analysis changed a business decision.
- 9How do you handle missing data?
Example STAR answer
Example answer to: “Tell me about a time your analysis changed a business decision.”
Skills assessed
How to prepare for a Citi Data Scientist interview
- Tailor prep to the specific division.
- Bring commercial awareness.
- Define the metric and success criteria before reaching for a model.
- Practise SQL window functions and probability puzzles.
- Explain technical concepts in plain language — it's tested directly.
- Tie every analysis to a business decision.
Data Scientist salary
UK data scientists typically earn £45k–£85k, with senior and specialised roles exceeding £100k.
Frequently asked questions
What does the Citi Data Scientist interview process involve?
Citi's process runs through application & tests, video interview, assessment centre / superday, offer. For a Data Scientist, the technical rounds focus on statistics & probability, sql, python, and behavioural rounds assess common purpose and responsible finance.
What is the Citi interview process?
Online assessments, a video interview and an assessment centre or superday with interviews and a case or group exercise, varying by division.
Is SQL tested in data science interviews?
Yes — SQL is almost always tested, including joins, aggregations and window functions.
How much machine learning do I need?
Enough to choose appropriate models, explain trade-offs and evaluate them properly. Depth scales with the role's seniority and specialism.
Preparing for a Citi Data Scientist interview?
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