Data Science Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Data Science Interview Questions

Questions Answers Views Company eMail

How do you handle missing values in python or r?

290

What is a document database?

372

Define a sql query? How do you use sql in sas, python, r languages?

353

Why do you need a for loop? How do you do for loops in python and r?

316

What is random forests and how is it different from decision trees?

263

What is a z test?

315

Why do you need a for loop?

288

How would churn help predict and control churn for a customer?

268

Where linear optimization is used?

373

What is an api? What are apis used for?

291

What is logistic and linear regression? Name some packages in r and python for building regression models.

301

What is t test?

298

What is the travelling salesman problem?

268

Define a sql query? What is the difference between select and update query?

328

what is json and what is xml?

301

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Un-Answered Questions { Data Science }

What are applications of ggplot2?

344

Can you provide an example of features extraction?

306

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

298

How to solve multi-collinearity?

369

What does pip installation?

297

while working on a data set, how can you select important variables? Explain

337

What are outlier values and how do you treat them?

342

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

281

What are iterators in Python?

323

What do you understand by term hash table collisions?

277

Can you compare the validation set with the test set?

296

What do you mean by cluster sampling and systematic sampling?

246

Python or R is better for data science?

368

What kind of product you want to build at LinkedIn?

282

Which database is best for data science?

292

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