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 supervised and unsupervised methods?

367

What is a z test, chi square test, f test and t test?

350

What packages are used for data mining in python and r?

340

What are the various classification algorithms?

347

What is data science? Also, list the differences between supervised and unsupervised learning.

317

A certain couple tells you that they have two children, at least one of which is a girl. What is the probability that they have two girls?

410

List the differences between supervised and unsupervised learning.

356

How does data cleaning plays a vital role in analysis?

391

What is back propagation and explain it’s working.

328

What is the role of activation function?

493

Explain the structure of artificial neural networks?

418

Explain the difference between a validation set and a test set?

320

In any 15-minute interval, there is a 20% probability that you will see at least one shooting star. What is the probability that you see at least one shooting star in the period of an hour?

476

How can you generate a random number between 1 – 7 with only a die?

585

What is the difference between “long” and “wide” format data?

332

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Un-Answered Questions { Data Science }

Define naive bayes?

307

How long does it take to become a data scientist?

442

Define data reduction?

279

what is json and what is xml?

330

What is the common perception of visualization?

288

What is a generating function?

354

What are the applications of data science?

372

What are the important skills to have in python with regard to data analysis?

326

What do you understand by bias, variance trade-off?

328

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

309

What is the importance of having a selection bias?

312

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

318

What does _init_.py do?

410

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

347

Will Uber cause city congestion?

415

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