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 machine learning and how can it be used for time series analysis?

296

Explain recommender systems?

355

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

348

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

365

What is a linear regression?

372

What is skewed distribution & uniform distribution?

337

Discuss decision tree algorithm?

308

What is back propagation?

330

List out the libraries in python used for data analysis and scientific computations?

316

What is a univariate analysis?

354

Name commonly used algorithms.

410

Explain why data cleansing is essential and which method you use to maintain clean data?

337

what is prior probability and likelihood?

413

Explain eigenvalue and eigenvector

329

Define boltzmann machine

316

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Un-Answered Questions { Data Science }

Why is Python used in data science?

367

Describe the various steps involved while carrying out an analytical project?

329

Suppose that American Express has 1 million card members along with their transaction details. They also have 10,000 restaurants and 1000 food coupons. Suggest a method which can be used to pass the food coupons to users given that some users have already received the food coupons so far.

332

You have two sorted array of integers, write a program to find a number from each array such that the sum of the two numbers is closest to an integer i.

328

Which package is used to do data import in r and python? How do you do data import in sas?

333

What is logistic regression in data science?

459

Can you provide examples for other computations in spark?

275

What is the difference between Stack and Queue

508

How is data modeling different from database design?

313

How can bogus Facebook accounts be detected?

346

How can you build and test a metric to compare ranked list of TV shows or Movies for two Netflix users?

566

what is json and what is xml?

344

What is interpolation and extrapolation?

420

What does a data scientist do?

408

What is the differences between univariate, bivariate and multivariate analysis?

363

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