classification – Machine Learning Interviews

How does KNN algorithm work ? What are the advantages and disadvantages of KNN ?

Posted on February 14, 2019October 26, 2020 by MLNerds

The KNN algorithm is commonly used in many ML applications – right from supervised settings such as classification and regression, to just retrieving similar items in applications such as recommendation systems, search, question answering and so on. What is the KNN Algorithm? KNN for Nearest Neighbour Search: KNN algorithm involves retrieving the K datapoints that are…

You have come up with a Spam classifier. How do you measure accuracy ?

Posted on February 14, 2019 by MLNerds

Spam filtering is a classification problem. In a classification problem, the following are the common metrics used to measure efficacy : True positives : Those data points where the outcome is spam and the document is actually spam. True Negatives: Those data points where the outcome is not spam and the document is actually not…