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Data Science Interview Questions
Questions Answers Views Company eMail

What data structures are available in the Pandas package in Python programming language?

WalMart,

362

What is a joke that people say about you and how would you rate the joke on a scale of 1 to 10?

Mu Sigma,

336

How to solve multi-collinearity?

Uber,

408

Count the total number of trees in United States.

Goldman Sachs,

335

Write a program to segment a long string into a group of valid words using Dictionary. The result should return false if the string cannot be segmented. Also explain about the complexity of the devised solution.

LinkedIn,

436

How can bogus Facebook accounts be detected?

Facebook,

346

How many dentists are there in US?

Facebook,

405

What motivates you to transition from academia to data science?

Insight,

325

A stranger uses a search engine to find something and you do not know anything about the person. How will you design an algorithm to determine what the stranger is looking for just after he/she types few characters in the search box?

WalMart,

422

Define standard deviation, mean, mode and median.

Mu Sigma,

448

There are 8 identical balls and only one of the ball is slightly heavier than the others. You are given a balance scale to find the heavier ball. What is the least number of times you have to use the balance scale to find the heavier ball?

Goldman Sachs,

333

What kind of product you want to build at LinkedIn?

LinkedIn,

312

How will you explain JOIN function in SQL to a 10 year old ?

Uber,

394

What is the probability of pulling a different shape or a different colour card from a deck of 52 cards?

Facebook,

318

Given 2 vectors, how will you generate a sorted vector?

LinkedIn,

329


Post New Data Science Questions

Un-Answered Questions { Data Science }

Can you use a generator to create iterators?

400


What is f test?

425


What is k-means?

340


Create a program in a language of your choice to read a text file with various tweets. The output should be 2 text files-one that contains the list of all unique words among all tweets along with the count for repeated words and the second file should contain the medium number of unique words for all tweets.

373


Why is dimensional reduction performed before fitting a support vector machine (svm)?

366


What is Survival Analysis?

345


What skills do you need to be a data analyst?

363


What is meant by classical ANOVA?

401


What do you understand by Poisson distribution?

326


How do you treat colinearity?

319


What would you add to Facebook and how would you pitch it and measure its success?

374


What are the differences between overfitting and underfitting?

427


What is the job of analytics?

362


Who can be scientific data there are three general steps to becoming a data scientist?

337


Which laptop is best for data analysis?

357