Data Science Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Data Science Interview Questions

Questions Answers Views Company eMail

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

WalMart,

358

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,

330

How to solve multi-collinearity?

Uber,

401

Count the total number of trees in United States.

Goldman Sachs,

330

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,

431

How can bogus Facebook accounts be detected?

Facebook,

339

How many dentists are there in US?

Facebook,

397

What motivates you to transition from academia to data science?

Insight,

319

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,

417

Define standard deviation, mean, mode and median.

Mu Sigma,

440

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,

327

What kind of product you want to build at LinkedIn?

LinkedIn,

306

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

Uber,

377

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

Facebook,

310

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

LinkedIn,

324

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Un-Answered Questions { Data Science }

Explain OLS in brief?

345

Give some situations where you will use an SVM over a RandomForest Machine Learning algorithm and vice-versa?

453

How can you assess a good logistic model?

404

State some use cases where Hadoop MapReduce works well and where it does not.

336

What is the difference between an analyst and a data scientist?

324

What is the probability of getting a HTT combination before getting a TTH combination?

305

How many big Macs does McDonald sell every year in US?

314

What is meant by binomial distribution?

448

You are about to get on a plane to Seattle, you want to know whether you have to bring an umbrella or not. You call three of your random friends and as each one of them if it's raining. The probability that your friend is telling the truth is 2/3 and the probability that they are playing a prank on you by lying is 1/3. If all 3 of them tell that it is raining, then what is the probability that it is actually raining in Seattle.

329

Explain each data visualization in detail?

317

What are the various types of selection bias?

342

On rolling a dice if you get $1 per dot on the upturned face,what are your expected earnings from rolling a dice?

284

Explain how to merge the files into a single dataframe?

356

Discuss linear regression?

323

What is pylab?

420

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