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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,

394

How can you reduce bias in a given data set?

Airbnb,

397

How will you impute missing information in a dataset?

Airbnb,

380

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

Amazon,

382

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

Amazon,

415

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,

322

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,

357

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

Amazon,

328

How do you treat colinearity?

Amazon,

350

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

Amazon,

356

What is the difference between Stack and Queue

Amazon,

553

What is the difference between Linkedin and Array

Amazon,

461

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,

372

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,

407

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

Goldman Sachs,

387


Post New Data Science Questions

Un-Answered Questions { Data Science }

What cross validation technique would you use on time series data set? Is it k-fold or loocv?

348


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.

467


Explain cluster sampling technique in data science

440


What are the different performance metrics for evaluating Uber services?

369


What is missing value imputation? How do you handle missing values in python or r?

393


What are an eigenvalue and eigenvector?

358


What are the important skills to have in python with regard to data analysis?

376


Explain calculate distance methods briefly?

353


How will you compare the results of various machine learning algorithms?

395


Explain types of statistical data?

348


What do you understand by decision tree?

515


Describe the various steps involved while carrying out an analytical project?

365


Define a/b testing?

437


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.

357


Can you explain unsupervised learning?

421