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?

355

What is association analysis?

289

How do you do for loops in python and r?

336

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

301

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

270

What is column storage?

328

How is random forests different from decision trees?

376

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

275

How do you do data import in sas?

299

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

324

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

305

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

355

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

317

How do you use lambda in python?

326

What is the difference between kmeans clustering and hierarchical clustering?

379

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Un-Answered Questions { Data Science }

Print the elements of a matrix in zig-zag manner.

281

What is reinforcement learning?

289

What are Random Forests?

305

Which method in pandas.tools.plotting is used to create scatter plot matrix?

391

Count the total number of trees in United States.

299

What is meant by linear regression?

273

what the aim of conducting a/b testing?

296

What is the importance of data cleaning in analysis?

286

What do you understand by linear regression and logistic regression?

348

How will you design a recommendation engine for jobs?

319

Explain the differences between bivariate and multivariate analysis?

299

Burn two ropes, one needs 60 minutes of time to burn and the other needs 30 minutes of time. How will you achieve this in 45 minutes of time ?

303

Write the code to reverse a Linked list.

382

What is data science?

323

What do you mean by survival analysis in R?

352

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