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

Data Science Interview Questions

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You are given two tables- friend_request and request_accepted. Friend_request contains requester_id, time and sent_to_id and request_accepted table contains time, acceptor_id and requestor_id. How will you determine the overall acceptance rate of requests?

Facebook,

348

What would you do to summarize a Twitter feed?

Microsoft,

348

What is data science?

362

What is the goal of A/B Testing?

381

How will you define the number of clusters in a clustering algorithm?

450

What does the future hold for data scientists?

347

What is meant by Poisson regression?

382

What are essential skills and training needed in data Science?

351

Can you use machine learning for time series analysis?

335

What prior knowledge is required to become data scientist?

316

During analysis, how do you treat missing values?

409

Is it possible to perform logistic regression with Microsoft Excel?

384

How can outlier values be treated?

391

What does Machine Learning mean for the Future of Data Science?

357

How can you iterate over a list and also retrieve element indices at the same time?

336

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Un-Answered Questions { Data Science }

What is a/b testing in data science?

347

Can you explain the difference between a Test Set and a Validation Set?

341

Write the code to reverse a Linked list.

436

What is the probability of getting a HTT combination before getting a TTH combination?

314

I have a string “contact@dezyre.com”. Which string function can be used to split the string into two different strings “contact@dezyre” and “com” ?

366

Implement a sorting algorithm for a numerical dataset in Python.

352

How can the outlier values be treated?

383

Python or R is better for data science?

397

What are the types of business decisions?

339

Explain data wrangling?

343

Give a large dataset, find the median.

340

What is an Eigenvalue and Eigenvector?

346

Explain box cox transformation?

391

Can you explain data cleansing?

326

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

319

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