Among the following propositions, which ones are true for hierarchical agglomerative clustering (HAC)?

With scikit-learn, when training an estimator with supervision, we need two arrays:

• X, of shape (a, b), which contains input data,
• y, of shape(????), which contains targets.

What is the meaning of b?

Some characters have special meaning which trigger some Jupyter "magic".

Match the "magic" behaviors with the proposed characters.

Like vim, jupyter has two modes.

Match each mode with the appropriate keyboard shortcut use to activate it.

There are some really useful keyboards shortcuts that you should be aware of in Jupyter.

Match the commands with the shortcuts that trigger them.

Let aa and bb be a numpy.array's such as

and

(shape of bb is (3,))

What is the value of cc = aa + bb?

Let aa and bb be a numpy.array's such as

and

What is the correct instruction to extract the content of bb from aa?

Let aa and bb be a numpy.array's such as

and

What is the correct instruction to extract the content of bb from aa?

Let aa and bb be a numpy.array's such as

and

What is the correct instruction to extract the content of bb from aa?

Let aa and bb be a numpy.array's such as

and

What is the correct instruction to extract the content of bb from aa?