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?

405

What is association analysis?

321

How do you do for loops in python and r?

367

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

339

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

298

What is column storage?

382

How is random forests different from decision trees?

432

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

314

How do you do data import in sas?

341

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

364

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

333

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

393

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

353

How do you use lambda in python?

366

What is the difference between kmeans clustering and hierarchical clustering?

426

Post New Data Science Questions

Un-Answered Questions { Data Science }

Explain Examples of Data Science?

341

Can you cite some examples where both false positive and false negatives are equally important?

400

What is the advantage of performing dimensionality reduction before fitting an svm?

305

Differentiate between data modeling and database design?

329

Define cluster sampling?

333

What is k-means? How can you select k for k-means?

343

How would churn help predict and control churn for a customer?

300

What is the 80/20 rule?

340

What is difference between sas, r and python programming?

379

How do data scientists use statistics?

330

What are feature vectors?

342

A jar has 1000 coins, of which 999 are fair and 1 is double headed. Pick a coin at random, and toss it 10 times. Given that you see 10 heads, what is the probability that the next toss of that coin is also a head?

1474

What are iterators in Python?

380

What do you understand by normal distribution?

495

Please explain eigenvectors and eigenvalues?

302

For More Un-Answered { Data Science } Questions Click Here