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Data Science Interview Questions
Questions Answers Views Company eMail

How do you handle missing values in python or r?

283

What is a document database?

358

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

344

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

305

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

255

What is a z test?

306

Why do you need a for loop?

279

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

260

Where linear optimization is used?

367

What is an api? What are apis used for?

279

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

289

What is t test?

288

What is the travelling salesman problem?

259

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

318

what is json and what is xml?

293


Post New Data Science Questions

Un-Answered Questions { Data Science }

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

347


Define feature vector?

333


How can I become a data scientist?

311


How will you test that there is increased probability of a user to stay active after 6 months given that a user has more friends now?

486


How can you deal with different types of seasonality in time series modelling?

303


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

539


What skills are required for data analytics roles?

348


What is the probability of pulling a different shape or a different colour card from a deck of 52 cards?

275


Explain k-mean?

262


What is the salary for a data scientist?

282


You created a predictive model of a quantitative outcome variable using multiple regressions. What are the steps you would follow to validate the model?

294


Can you explain k-mean?

346


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

296


During analysis, how do you treat missing values?

364


What is meant by Poisson regression?

328