Sobes.tech

Machine Learning / AI

What is stratified sampling in experiments?

Middle — Senior
295

What are indexes in databases and why are they needed?

231

Why is a B-tree index most commonly used and what is its algorithmic complexity?

230

What is Bayesian Optimization and acquisition functions (EI, UCB, PI)?

226

What problems arise when training logistic regression if the number of features exceeds the number of observations?

221

How many rows will CROSS JOIN return for tables with 100 and 10 records?

213

What is the difference between DWH and Data Lake?

209

What are the disadvantages of columnar databases?

208

What solutions would you suggest when system load increases?

206
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