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?

315

What is a document database?

402

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

395

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

350

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

314

What is a z test?

368

Why do you need a for loop?

336

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

300

Where linear optimization is used?

419

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.

337

What is t test?

332

What is the travelling salesman problem?

299

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

370

what is json and what is xml?

344

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Un-Answered Questions { Data Science }

Can you explain k-mean?

400

Why data science and data scientists are needed?

295

How to choose the right chart in case of creating a viz?

315

Is 8gb ram enough for data analysis?

406

What is the difference between select and update query?

405

Name the methods for General component analysis and explain them?

394

What do you understand by the lattice package?

350

Explain how to merge data frames in R?

331

What is a recall?

381

Do we have different selection biases, if yes, what are they?

386

How will you cut a circular cake into 8 equal pieces?

304

What is the purpose of a/b testing?

340

Write a function that takes in two sorted lists and outputs a sorted list that is their union?

403

Explain the differences between univariate and multivariate analysis?

434

Can you define linear regression?

318

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