Paynearby Technologies Data Scientist Interview Questions and Answers

Q1. What is clustering
Ans. 
Clustering is a technique used in data analysis to group similar data points together based on their characteristics.
• Clustering is an unsupervised learning method.

• It helps in identifying patterns and relationships in data.

• Common clustering algorithms include K-means, hierarchical clustering, and DBSCAN.

• Example: Grouping customers based on their purchasing behavior.

• Example: Identifying different species of flowers based
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Q2. How to avoid overfitting
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To avoid overfitting, use techniques like cross-validation, regularization, and increasing training data.
• Use cross-validation to evaluate model performance on unseen data

• Apply regularization techniques like L1 or L2 regularization to penalize complex models

• Increase the size of the training dataset to provide more diverse examples

• Use feature selection or dimensionality reduction methods to reduce the complexity of the m...read more
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Sql and pandas problems along mcqs on ML

Q1. Linear Regression
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Q2. Basic Neural Network Implementation
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Q1. Question about working of BERT
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Q2. Word2vec explanation
Ans. 
Word2vec is a technique used to create word embeddings by training a neural network on a large corpus of text.
• Word2vec is a shallow neural network model that learns to represent words as vectors in a continuous vector space.

• It captures semantic relationships between words by placing similar words close together in the vector space.

• There are two main architectures for Word2vec: Continuous Bag of Words (CBOW) and Skip-gr...read more
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Q1. Question regarding my resume .It is technical interview
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Case study-this is about loan default prediction assignment

Q1. About your education
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Q2. Asking about company details
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Q3. Asking about Excel
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Q4. Regarding self introduction
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Q1. About MS office
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Q2. Ms office and Excel
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Q3. Mutual funds basics
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Q1. About MS office, Typing skills
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It was a basic Aptitude test, Needed to learn Probability, Permutation , Cobination and SQL.
Total Duration 1 Hour.

Q1. Case Study of zomato ?
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Q2. Some basic math questions. Simultaneous equations .
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Q1. Brief me about yourself
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Q1. What is your experience as a data analyst?
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