Tiger Analytics Senior Data Scientist Interview Questions and Answers

Q1. Questions were asked related to ML modelling process
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Q2. Basic python coding
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Q1. What is Transformers and how they work
Ans. 
Transformers are models used in natural language processing tasks, known for their ability to handle long-range dependencies.
• Transformers use self-attention mechanism to weigh the importance of different words in a sentence.

• They consist of encoder and decoder layers, with each layer containing multi-head attention and feed-forward neural network.

• Examples of transformer models include BERT, GPT-3, and TransformerXL.
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Q2. How to train a model with imbalance data
Ans. 
Use techniques like oversampling, undersampling, SMOTE, or ensemble methods to train a model with imbalanced data.
• Use oversampling to increase the number of minority class samples.

• Use undersampling to decrease the number of majority class samples.

• Use Synthetic Minority Over-sampling Technique (SMOTE) to generate synthetic samples for the minority class.

• Utilize ensemble methods like Random Forest or Gradient Boosting to
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3 coding questions of data structures

Q1. Previous work experience and skills
Ans. 
I have 5 years of experience in data analysis, machine learning, and statistical modeling. Proficient in Python, R, SQL, and Tableau.
• 5 years of experience in data analysis, machine learning, and statistical modeling

• Proficient in Python, R, SQL, and Tableau

• Developed predictive models for customer churn prediction using machine learning algorithms

• Performed data cleaning, preprocessing, and visualization for large dataset...read more
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Q2. Guesstimate about number of flights in India
Ans. 
There are approximately 2.5 million flights in India annually.
• India is one of the fastest growing aviation markets in the world.

• Major airports like Delhi, Mumbai, Bangalore, and Chennai handle a large number of flights daily.

• Airlines like IndiGo, SpiceJet, and Air India operate numerous domestic and international flights.

• The number of flights has been increasing steadily over the years due to growing demand for air tra
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Q1. Questions around the previous work
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Q2. Questions around how re-rank work, and image segmentation,
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Q3. Questions with podman and docker
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