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

Data Science Interview Questions

Questions Answers Views Company eMail

What is the difference between select and update query?

393

What is association analysis?

316

How do you do for loops in python and r?

359

What is data science? How would you say it is similar or different to business analytics and business intelligence?

330

What is an outlier? How do you treat outlier data?

288

What is column storage?

371

How is random forests different from decision trees?

425

Name some kinds of graphs and explain how you would build them in python or r.

304

How do you do data import in sas?

334

What is churn? How would it help predict and control churn for a customer?

356

Which package is used to do data import in r and python? How do you do data import in sas?

328

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

385

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

348

How do you use lambda in python?

354

What is the difference between kmeans clustering and hierarchical clustering?

412

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Un-Answered Questions { Data Science }

I have a string “contact@dezyre.com”. Which string function can be used to split the string into two different strings “contact@dezyre” and “com” ?

356

You are creating a report for user content uploads every month and observe a sudden increase in the number of upload for the month of November. The increase in uploads is particularly in image uploads. What do you think will be the cause for this and how will you test this sudden spike?

394

What is the definition of the unit test?

336

What is the role of the activation function?

315

How to run a pycharm debugging?

409

Why do you want to work as a data scientist?

297

What are Type 1 and Type 2 errors ?

331

Explain unsupervised learning?

302

What are iterators in Python?

367

How would you do market basket analysis in r and python?

361

What is meant by binomial distribution?

448

Define some key performance indicators for the product

292

What is back propagation and explain it’s working.

328

What are independent graphics subsystems?

414

How to work towards a random forest?

419

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