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Which statement correctly distinguishes AdaBoost from gradient boosting?

In k-nearest neighbors (KNN), what does the hyperparameter k control?

The Gini impurity of a binary-class node with class probabilities (p, 1−p) is 2p(1−p). What is the Gini impurity of a perfectly pure node?

In KNN with k=5, suppose the training set has 80 class-A and 20 class-B examples. A new test point’s 5 nearest neighbors are all class B. The predicted label is:

Which of the following is NOT a typical advantage of tree-based ensemble methods over neural networks?

Why does random feature subsampling at each split reduce correlation between trees in a random forest?

Adding more trees to a random forest beyond a sufficient number will:

Which term matches this definition?A situation in which parties to a contract reach a bargain on the basis of an incorrect assumption common to both parties.

Which term matches this definition?An equitable remedy that requires a party to perform the contractual promise rather than merely pay damages.

Which term matches this definition?An essential element in the creation of a contract obligation that creates a detriment to the promisee or a benefit to the promisor.