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?

321

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

311

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

302

What are the various classification algorithms?

305

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

275

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?

377

List the differences between supervised and unsupervised learning.

313

How does data cleaning plays a vital role in analysis?

353

What is back propagation and explain it’s working.

292

What is the role of activation function?

443

Explain the structure of artificial neural networks?

367

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

273

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?

432

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

539

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

287

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Un-Answered Questions { Data Science }

Can you explain eigenvalue and eigenvector?

301

What are Important things to remember for ggplot?

357

What are Type 1 and Type 2 errors ?

288

How will you find the second largest element in a Binary Search tree ?

263

Why is Python used in data science?

309

Please explain the role of data cleaning in data analysis.

288

How to run a pycharm debugging?

366

State some use cases where Hadoop MapReduce works well and where it does not.

308

If you had to choose between the programming languages r and python, which one would you use for text analytics?

352

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

317

How to create survival object in R?

504

Can you write the formula to calculate r-square?

273

Explain about the box cox transformation in regression models?

254

Find out K most frequent numbers from a given stream of numbers on the fly.

278

Define feature vector?

333

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