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Data Science Interview Questions
Questions Answers Views Company eMail

How do you handle missing values in python or r?

308

What is a document database?

397

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

387

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

343

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

303

What is a z test?

358

Why do you need a for loop?

325

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

293

Where linear optimization is used?

411

What is an api? What are apis used for?

330

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

330

What is t test?

326

What is the travelling salesman problem?

291

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

364

what is json and what is xml?

331


Post New Data Science Questions

Un-Answered Questions { Data Science }

What are apis used for?

386


In any 15-minute interval, there is a 20% probability that you will see at least one shooting star. What is the proba­bility that you see at least one shooting star in the period of an hour?

478


Explain the steps for a data analytics project

439


How can you generate a random number between 1 – 7 with only a die?

585


Which laptop is best for data analysis?

352


Define data discretization?

283


A test has a true positive rate of 100% and false positive rate of 5%. There is a population with a 1/1000 rate of having the condition the test identifies. Considering a positive test, what is the probability of having that condition?

559


What are outlier values?

409


Can you define convex hull?

351


What is a recall?

372


Can you provide examples for other computations in spark?

267


In a given day, how many birthday posts occur on Facebook?

425


Please explain the role of data cleaning in data analysis.

325


Where is association analysis used?

369


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.

323