DUNNHUMBY IT SERVICES INDIA Data Scientist Interview Questions and Answers

Few mcq on stats and ml, followed by 3 python function codes

Machine learning, python, sql, stats

Q1. Build a MMX Model for the dataset given and share the insights
Ans. 
Build a MMX Model for a given dataset and share insights
• Preprocess the data by handling missing values and encoding categorical variables

• Split the data into training and testing sets

• Build the MMX model using appropriate algorithms like decision trees or random forests

• Evaluate the model using metrics like accuracy, precision, recall, and F1 score

• Interpret the model results to gain insights and make data-driven decisions
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Q2. How to evaluate Time series analysis
Ans. 
Time series analysis can be evaluated by examining the accuracy of forecasts, the model's ability to capture trends and patterns, and the overall performance metrics.
• Evaluate forecast accuracy using metrics like Mean Absolute Error (MAE) or Root Mean Squared Error (RMSE)

• Assess the model's ability to capture trends and patterns by visualizing the data and comparing it to the model's predictions

• Analyze the overall perfor...read more
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Q1. Explain the projects worked on previous companies and questions related to it
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Q2. Questions bases on time series algorithms
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Q1. Hyper parameter tuning
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Q1. Why join epsilon?
Ans. 
Epsilon offers cutting-edge technology, diverse projects, and a collaborative work environment.
• Epsilon provides opportunities to work with advanced technology and tools in data science.

• The company offers a wide range of projects across various industries, allowing for diverse and challenging work.

• Epsilon fosters a collaborative work environment, encouraging teamwork and knowledge sharing among data scientists.

• The compa...read more
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Q1. Projects and technical background
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They gave me case study in interview based on that I had provide the solution.

Q1. They asked question regarding SQL, statistics and some project related questions
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Q1. Questions were on my resume
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Q2. And also questions more on SQL and python
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Q3. Asked have you worked on any dash boards
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Q1. Tell me about yourself
Ans. 
I am a highly motivated and experienced professional with a strong background in the field.
• I have a Bachelor's degree in Business Administration

• I have over 5 years of experience in sales and marketing

• I am skilled in developing and implementing effective strategies

• I have a proven track record of exceeding sales targets

• I am a team player and have excellent communication skills
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Q2. Last movie you have watched
Ans. 
The last movie I watched was 'Inception'.
• The movie is directed by Christopher Nolan.

• It is a science fiction action film.

• The plot revolves around a thief who steals corporate secrets through dream-sharing technology.

• The film stars Leonardo DiCaprio, Joseph Gordon-Levitt, and Ellen Page.

• It received critical acclaim for its unique concept and visual effects.
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Q1. Talk about yourself
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Q2. What is your professional experience
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Simple SQL questions