In k-means or knn, we use euclidean distance to calculate the distance between nearest neighbors. Why not manhattan distance?

415

What is a document database?

397

Explain calculate distance methods briefly?

313

What is the difference between bayesian estimate and maximum likelihood estimation (mle)?

309

How can you select k for k-means?

313

why is data cleaning important for analysis?

361

How can you compute an inverse matrix faster by playing with some computation tricks?

328

You have two tables-the first table has data about the users and their friends, the second table has data about the users and the pages they have liked. Write an SQL query to make recommendations using pages that your friends liked. The query result should not recommend the pages that have already been liked by a user.

410

What is the common perception of visualization?

288

What is pylab?

420

How will you prove that the square root of 2 is irrational?

304

What is an rdbms? Name some examples for rdbms? What is crud?

297

What is a/b testing in data science?

338

How is data science different from data analytics?

338

Please explain the role of data cleaning in data analysis.

325