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 do you mean by p-value?

282

What is the 80/20 rule?

289

How decision tree algorithm is different from the random forest algorithm?

300

What is the roc curve?

314

What is the aim of a/b testing?

272

Define naive bayes?

278

How is data science different from data analytics?

314

What is the 80/20 rule? Explain its importance in model validation?

281

Explain box cox transformation?

358

Explain the decision tree algorithm, and how is it different from the random forest algorithm?

281

What is the svm algorithm?

361

Explain the importance of 80/20 rule in model validation?

306

Explain the term "data warehouse".

322

What do you understand by ensemble learning?

314

What do you understand by confusion matrix?

321

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Un-Answered Questions { Data Science }

What is the degree of freedom for lasso?

316

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.

298

Can you compare the validation set with the test set?

295

Why is dimensional reduction performed before fitting a support vector machine (svm)?

335

What is pylab?

369

Explain how to define the number of clusters in a clustering algorithm?

365

Can you explain data munging or data wrangling?

282

Write the code to reverse a Linked list.

378

Explain eigenvalue and eigenvector

289

Discuss decision tree algorithm?

269

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

319

What is nosql? Name some examples of nosql databases. What is a key value store? What is column storage? What is a document database?

263

How is true positive rate and recall related? Write the equation.

273

What is the job of a data scientist?

314

Explain the decision tree algorithm?

338

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