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

Data Science Interview Questions

Questions Answers Views Company eMail

You are given two tables- friend_request and request_accepted. Friend_request contains requester_id, time and sent_to_id and request_accepted table contains time, acceptor_id and requestor_id. How will you determine the overall acceptance rate of requests?

Facebook,

348

What would you do to summarize a Twitter feed?

Microsoft,

348

What is data science?

362

What is the goal of A/B Testing?

381

How will you define the number of clusters in a clustering algorithm?

452

What does the future hold for data scientists?

348

What is meant by Poisson regression?

382

What are essential skills and training needed in data Science?

355

Can you use machine learning for time series analysis?

337

What prior knowledge is required to become data scientist?

318

During analysis, how do you treat missing values?

409

Is it possible to perform logistic regression with Microsoft Excel?

384

How can outlier values be treated?

391

What does Machine Learning mean for the Future of Data Science?

358

How can you iterate over a list and also retrieve element indices at the same time?

336

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Un-Answered Questions { Data Science }

Write a function to extract the first name from the string?

304

Define data discretization?

295

what is bias?

357

What is advantage of using apply family of functions in r?

353

348

A dice is rolled twice, what is the probability that on the second chance it will be a 6?

333

What is meant by logistic regression?

395

what the aim of conducting a/b testing?

332

How is a normal distribution different from chi square distribution?

347

How can I achieve accuracy in the first model that I built?

312

What do you understand by statistical power of sensitivity and how do you calculate it?

348

How do you use sql in sas, python, r languages?

352

What is the difference between select and update query?

405

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?

531

Why is it mandatory to clean a data set?

381

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