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?

350

What is association analysis?

288

How do you do for loops in python and r?

335

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

296

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

269

What is column storage?

325

How is random forests different from decision trees?

373

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

273

How do you do data import in sas?

296

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?

352

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

316

How do you use lambda in python?

321

What is the difference between kmeans clustering and hierarchical clustering?

379

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Un-Answered Questions { Data Science }

What prior subject is required to become a data analyst?

289

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

294

What do you do as a data scientist?

316

Python is enough for data science ?

309

What is the role of activation function?

451

Explain auto-encoder

281

How do data scientists code in r?

288

Explain the decision tree algorithm?

338

Discuss artificial neural networks

340

What laptop should I buy for data science?

313

What do you understand by parametric and non-parametric methods? Explain with examples.

288

What is the 80/20 rule?

289

How will you test a machine learning model for accuracy?

284

What prior knowledge is required to become data scientist?

285

What is association analysis? Where is it used?

330

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