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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,

360

How can you reduce bias in a given data set?

Airbnb,

356

How will you impute missing information in a dataset?

Airbnb,

345

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

Amazon,

341

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

Amazon,

384

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,

290

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,

326

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

Amazon,

288

How do you treat colinearity?

Amazon,

319

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

Amazon,

320

What is the difference between Stack and Queue

Amazon,

504

What is the difference between Linkedin and Array

Amazon,

416

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,

332

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,

358

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

Goldman Sachs,

342


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Un-Answered Questions { Data Science }

Name the methods for General component analysis and explain them?

390


What do you mean by the term linear regression?

335


How will you design the heatmap for Uber drivers to provide recommendation on where to wait for passengers? How would you approach this?

1716


How do you treat colinearity?

319


What is a generating function?

357


Which is the best suitable language among python and r for text analytics?

338


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?

358


What is column storage? What is a document database?

394


Explain types of clustering algorithm?

312


If you had to choose between the programming languages r and python, which one would you use for text analytics?

395


What are big data and data science?

427


Define an algorithm to discover when a person is starting to search for new job.

361


Explain the term binomial probability formula?

321


Develop an algorithm to sort two lists of sorted integers into a single list.

316


What do you understand by linear regression and logistic regression?

385