Answer / Avlokna Agarwal

Iterators in Python are objects that allow accessing the elements of containers like lists, dictionaries, and sets sequentially. They provide methods for iteration, such as next(), __iter__(), and others.

Can you define feature vector?

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What is the difference between kmeans clustering and hierarchical clustering?

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Among python and r, which one is generally preferred for text analytics?

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What is a z test?

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How is bagging different from boosting?

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What do I need to study to become a data analyst?

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How to solve multi-collinearity?

1 Answers   Uber,

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Could you draw a comparison between overfitting and underfitting?

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You are given a training dataset of users that contain their demographic details, the pages on Facebook they have liked so far and results of psychology test based on their personality i.e. their openness to like FB pages or not. How will you predict the age, gender and other demographics of unseen data?

1 Answers   American Express,

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You have two tables-the first table has data about the users and their friends, the second table has data about the users and the pages they have liked. Write an SQL query to make recommendations using pages that your friends liked. The query result should not recommend the pages that have already been liked by a user.

1 Answers   Facebook,

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What is the good measure of influence of a Twitter user?

1 Answers   Twitter,

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What do you understand by Ordinary Least Squares Linear Regression?

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