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?

380

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?

357

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.

371

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?

488

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 }

A dice is rolled twice, what is the probability that on the second chance it will be a 6?

333

Pycharm has a debugger?

481

You are given a training dataset of users that contain their demographic details, the pages on Facebook they have liked so far and results of psychology test based on their personality i.e. their openness to like FB pages or not. How will you predict the age, gender and other demographics of unseen data?

339

How is random forests different from decision trees?

432

What is data science with example?

355

Which companies participating in Insight would you be interested in working for?

341

Give an example of a data set that has a non-gaussian distribution?

349

How do you treat missing values during analysis?

329

What is cluster sampling in data science?

366

What is the difference between skewed and uniform distribution?

344

Check whether a given integer is a palindrome or not without converting it to a string.

392

What is a random forest?

307

What are big data and data science?

431

why is data cleaning important for analysis?

372

Write the formula to calculate r-square?

354

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