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Data Science Interview Questions
Questions Answers Views Company eMail

What will you do if removing missing values from a dataset cause bias?

Airbnb,

358

How can you reduce bias in a given data set?

Airbnb,

352

How will you impute missing information in a dataset?

Airbnb,

341

Estimate the probability of a disease in a particular city given that the probability of the disease on a national level is low.

Amazon,

337

How will inspect missing data and when are they important for your analysis?

Amazon,

380

How will you decide whether a customer will buy a product today or not given the income of the customer, location where the customer lives, profession and gender? Define a machine learning algorithm for this.

Amazon,

287

From a long sorted list and a short 4 element sorted list, which algorithm will you use to search the long sorted list for 4 elements.

Amazon,

323

How can you compare a neural network that has one layer, one input and output to a logistic regression model?

Amazon,

285

How do you treat colinearity?

Amazon,

316

How will you deal with unbalanced data where the ratio of negative and positive is huge?

Amazon,

317

What is the difference between Stack and Queue

Amazon,

498

What is the difference between Linkedin and Array

Amazon,

412

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.

Facebook,

328

You have been given the data on Facebook user's friending or defriending each other. How will you determine whether a given pair of Facebook users are friends or not?

Facebook,

355

Estimate the number of square feet pizza's eaten in US each year.

Goldman Sachs,

339


Post New Data Science Questions

Un-Answered Questions { Data Science }

What is meant by feature vectors?

323


What is the central limit theorem? How is a normal distribution different from chi square distribution?

340


Discuss normal distribution

380


You own a clothing enterprise and want to improve your place in the market. How will you do it from the ground level ?

302


Are expected value and mean value different?

423


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

358


why do you need to perform resampling?

339


Could you draw a comparison between overfitting and underfitting?

397


What is random forests and how is it different from decision trees?

303


You are at a Casino. You have two dices to play with. You win $10 every time you roll a 5. If you play till you win and then stop, what is the expected pay-out?

359


Estimate the probability of a disease in a particular city given that the probability of the disease on a national level is low.

337


Why is data cleaning essential in data science?

292


Can you define power analysis?

330


What is meant by linear regression?

303


What is clustering? What is the difference between kmeans clustering and hierarchical clustering?

384