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?

379

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

358

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

347

What are the various classification algorithms?

356

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

323

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?

421

List the differences between supervised and unsupervised learning.

370

How does data cleaning plays a vital role in analysis?

399

What is back propagation and explain it’s working.

336

What is the role of activation function?

503

Explain the structure of artificial neural networks?

430

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

331

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?

485

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

590

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

339

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Un-Answered Questions { Data Science }

What is machine learning and how can it be used for time series analysis?

296

Can you explain data munging or data wrangling?

322

Can you explain eigenvalue and eigenvector?

347

why do you need to perform resampling?

348

Define a sql query?

342

What is the difference between iterator and generator in Python?

406

What is meant by Random Forest Classifier?

306

Explain p-value?

367

How to run a pycharm debugging?

420

Define some key performance indicators for the product

297

What cross validation technique would you use on time series data set? Is it k-fold or loocv?

307

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

322

What are independent graphics subsystems?

421

Why is data cleaning essential in data science?

304

What kind of product you want to build at LinkedIn?

312

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