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

Data Science Interview Questions

Questions Answers Views Company eMail

Define convex hull?

289

Write the formula to calculate r-square?

316

Explain k-mean?

267

Explain recommender system?

286

Explain the two main components of the hadoop framework?

308

Define analytics?

278

Explain the difference between data modeling and database design?

285

Define data reduction?

244

Explain data munging or data wrangling?

248

Define linear regression?

283

Define feature vector?

341

Explain the difference between sas, r and python programming?

292

Explain data cleansing?

288

Explain the differences between univariate, bivariate and multivariate analysis?

271

Explain the difference between bayesian estimate and maximum likelihood estimation (mle)?

294

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Un-Answered Questions { Data Science }

What are the differences between data science, machine learning, and artificial intelligence?

289

How many people are using Facebook in California at 1.30 PM on Monday?

388

What are decorators in Python?

1217

What is data science?

319

What devices or tools help you most as a data scientist?

260

What is the procedure to check the cumulative frequency distribution of any categorical variable?

361

What do you mean by cluster sampling and systematic sampling?

244

What is association analysis?

286

What is the central limit theorem? How is a normal distribution different from chi square distribution?

300

Explain data cleansing?

288

Discuss 'naive' in a naive bayes algorithm?

302

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

384

What is meant by sampling? Explain some sampling methods that you know?

275

Define the unit test with PyUnit?

324

Name some packages in r and python for building regression models.

284

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