How do I approach Machine Learning interview questions?

Machine Learning questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master machine learning interviews.

What difficulty level is this interview question?

This is a easy difficulty Machine Learning question, commonly asked during Technical Screen rounds at Two Sigma.

What role is this question designed for?

This question is commonly asked for Data Scientist candidates at Two Sigma during technical interviews.

Design a house-price prediction model | Two Sigma Interview Question

Quick Overview

This question evaluates machine learning and data science competencies including regression model design, feature engineering, data-splitting and leakage prevention, selection of evaluation metrics, handling missing values, outliers and high-cardinality location features, temporal drift management, and model interpretation for house-price prediction. It is commonly asked in the Machine Learning domain to assess end-to-end practical application and conceptual understanding of validation and metric trade-offs, primarily testing practical application supported by conceptual reasoning and stakeholder communication.

Problem

You are asked to build a model to predict house sale prices for a city of your choice.

Data (assume typical real-estate fields)

You have a historical dataset of home listings/sales with (examples):

sale_id (string, unique)
city (string)
sale_date (date)
sale_price (float, target)
bedrooms (int), bathrooms (float), sqft (float), lot_sqft (float)
year_built (int)
zipcode / neighborhood (string)
lat / lon (float)
property_type (categorical)
days_on_market (int)
Optional external features (if you choose): school ratings, crime, interest rates, nearby transit, etc.

Tasks

Propose an end-to-end approach (data cleaning → feature engineering → model selection).
Define how you would split data (train/validation/test) and avoid leakage .
Choose evaluation metrics and justify them (e.g., MAE vs RMSE vs MAPE).
Explain how you would handle:
- missing values and outliers
- high-cardinality location features (zip/neighborhood)
- temporal drift (market changes)
Describe how you would interpret the model and communicate results to stakeholders.

Quick Overview

Problem

You are asked to build a model to predict house sale prices for a city of your choice.

Data (assume typical real-estate fields)

You have a historical dataset of home listings/sales with (examples):

sale_id (string, unique)

city (string)

sale_date (date)

sale_price (float, target)

bedrooms (int), bathrooms (float), sqft (float), lot_sqft (float)

year_built (int)

zipcode / neighborhood (string)

lat / lon (float)

property_type (categorical)

days_on_market (int)

Optional external features (if you choose): school ratings, crime, interest rates, nearby transit, etc.

Tasks

Propose an end-to-end approach (data cleaning → feature engineering → model selection).

Define how you would split data (train/validation/test) and avoid leakage .

Choose evaluation metrics and justify them (e.g., MAE vs RMSE vs MAPE).

Explain how you would handle:

missing values and outliers
high-cardinality location features (zip/neighborhood)
temporal drift (market changes)

Describe how you would interpret the model and communicate results to stakeholders.

Design a house-price prediction model

Quick Overview

Design a house-price prediction model

Problem

Data (assume typical real-estate fields)

Tasks

Write your answer

Design a house-price prediction model

Quick Overview

Design a house-price prediction model

Problem

Data (assume typical real-estate fields)

Tasks

Write your answer