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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,

316

How can you reduce bias in a given data set?

Airbnb,

318

How will you impute missing information in a dataset?

Airbnb,

300

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

Amazon,

296

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

Amazon,

341

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,

258

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,

292

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

Amazon,

256

How do you treat colinearity?

Amazon,

285

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

Amazon,

287

What is the difference between Stack and Queue

Amazon,

439

What is the difference between Linkedin and Array

Amazon,

365

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,

289

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,

306

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

Goldman Sachs,

303


Post New Data Science Questions

Un-Answered Questions { Data Science }

State the difference between a validation set and a test set?

296


Can you explain difference between data modeling and database design?

311


What is a random forest?

255


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

256


What is jupyter ?

322


Do gradient descent methods always converge to the same point?

406


What are data science and analytic?

350


What is advantage of using apply family of functions in r? How do you use lambda in python?

316


How will you find the second largest element in a Binary Search tree ?

263


What do you understand by the lattice package?

291


What does pip installation?

288


How do you treat multicollinearity and heteroscedasticity in regression? Name some packages in r and python for building regression models.

293


What are outlier values?

369


Which companies participating in Insight would you be interested in working for?

302


How to check the frequency distribution of a categorical variable?

321