I know about linear regression , logistic regression, knn , k means clustering. Now these were the algorithms I knew the ins and outs about . Tip: always speak only of terms that you know. The asked me the full form of knn to which I told them it's k nearest neighbours. They tried to confuse me saying that it's actually neural network . I bluntly rejected their answer and started explaining the algorithm . When I raised the statement," it calculates the nearest distance" , they pounced on me and asked which distance ? I said it's the , "Euclidean distance". They replied this is what they were expecting for.