Photon Interactive Data Scientist Interview Questions and Answers

The first was a mcq based coding round for campus placement

This was a pairing coding round

Q1. Explain different unsupervised algo
Ans. 
Unsupervised algorithms are used to find patterns in data without labeled outcomes.
• K-means clustering: partitions data into K clusters based on similarity

• Hierarchical clustering: creates a tree of clusters based on similarity

• Principal Component Analysis (PCA): reduces dimensionality by finding orthogonal components

• Association rule mining: discovers interesting relationships between variables in large datasets
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OOPS concept and Dynamic Programming coding challenges

It was difficult and was on hackerrank

Q1. How to find a largest number in a list without using inbuilt function
Ans. 
Iterate through the list and compare each element to find the largest number.
• Iterate through the list using a loop

• Compare each element with a variable storing the current largest number

• Update the variable if a larger number is found
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Q1. Basic ML questions based on your project, python basic questions
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Basic python questions on pandas,numpy, and basic SQL questions on windows function like lag

Q1. General ML questions
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Q2. General dl. Questions
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Test+2 interviews(technical and statistics)

Basic guestimates and case studies

Coding test of 2 hours ,include model building

Q1. First Project explanation and in between that ask for project related questions and also asked basic ml to advance ml questions
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