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

Data Science Interview Questions

Questions Answers Views Company eMail

In a given day, how many birthday posts occur on Facebook?

Facebook,

433

Write the code to reverse a Linked list.

WalMart,

436

How will you overcome overfitting in predictive models?

438

Implement a sorting algorithm for a numerical dataset in Python.

Facebook,

352

Will Uber cause city congestion?

Uber,

421

How will you decide which version (Version 1 or Version 2) of the Surge Pricing Algorithms is working better for Uber ?

Uber,

374

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

Twitter,

316

A building has 100 floors. Given 2 identical eggs, how can you use them to find the threshold floor? The egg will break from any particular floor above floor N, including floor N itself.

Facebook,

443

What assumptions does linear regression machine learning algorithm make?

WalMart,

355

You have 2 dices. What is the probability of getting at least one 4? Also find out the probability of getting at least one 4 if you have n dices.

Facebook,

498

How will you design a recommendation engine for jobs?

LinkedIn,

356

How will you test a machine learning model for accuracy?

319

If we added one rider to the current SF market, how would that affect the existing riders and drivers?

Uber,

388

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

Facebook,

374

How will you test that there is increased probability of a user to stay active after 6 months given that a user has more friends now?

Facebook,

531

Post New Data Science Questions

Un-Answered Questions { Data Science }

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

346

What skills do you need to be a data analyst?

363

When do you need to update the algorithm in data science?

333

What is difference between sas, r and python programming?

379

Define the unit test with PyUnit?

353

What skills are required for data analytics roles?

382

Please explain gradient descent?

339

How do you take millions of users with 100's of transactions each, amongst 10000's of products and group the users together in a meaningful segments?

430

How can you reduce bias in a given data set?

360

Define a sql query? What is the difference between select and update query?

369

What is skewed distribution & uniform distribution?

337

Can you explain systematic sampling?

341

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.

336

Explain the differences between univariate and multivariate analysis?

433

Why data cleaning plays a vital role in the analysis?

386

For More Un-Answered { Data Science } Questions Click Here