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?

318

What is a document database?

408

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

402

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

356

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

316

What is a z test?

370

Why do you need a for loop?

342

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

300

Where linear optimization is used?

426

What is an api? What are apis used for?

335

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

343

What is t test?

337

What is the travelling salesman problem?

299

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

377

what is json and what is xml?

346

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Un-Answered Questions { Data Science }

What do you understand by normal distribution?

499

What is the 80/20 rule?

340

Which objects are iterated in python?

390

Can you define convex hull?

364

How do you do data import in sas?

345

What is a univariate analysis?

358

Explain the structure of artificial neural networks?

430

How do you build a custom function in python or r?

347

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

346

Explain Data Science Vs Machine Learning?

349

What is the role of activation function?

503

Explain k-mean?

322

Define the term deep learning?

346

When underfitting occurs in a static model?

404

What do you understand by clustering?

309

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