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Delete Elements From Ndarray

Question 1

How can you delete multiple elements from a numpy array?

np.delete(arr, indices)

arr.delete(indices)

np.remove(arr, indices)

arr.remove(indices)

Question 2

What does the axis parameter in np.delete() specify?

The index of the element to delete.

The axis along which to delete elements.

The number of elements to delete.

The size of the array after deletion.

Question 3

How can you delete the last element from a numpy array arr?

np.delete(arr, -1)

np.delete(arr, -1, axis=0).

np.delete(arr, -1, axis=1).

np.delete(arr, arr.size-1).

Question 4

Which of the following methods can be used to delete elements in-place from a numpy array?

np.delete()

np.remove()

arr.delete()

arr.remove()

Question 5

Which of the following is true about the np.delete() function?

It modifies the original array.

It returns a new array without modifying the original.

It only works for 1D arrays.

It can only delete elements at the beginning or end of the array.

Question 6

What happens if you try to delete an element at an index that is out of bounds for the array?

The array is padded with zeros.

An error is raised.

The element at the last index is deleted.

The element at the first index is deleted.

Question 7

What is the result of deleting elements along axis 0 from a 2D array using np.delete(arr, indices, axis=0)?

Delete rows

Delete columns

Delete elements along a diagonal.

No elements are deleted.

Question 8

How can you delete all elements from a numpy array?

np.clear(arr)

np.delete(arr, np.arange(arr.size)).

np.delete(arr, np.arange(arr.size), axis=0).

np.remove(arr, np.arange(arr.size)).

Question 9

Which of the following is a correct way to delete a row from a 2D array arr at index row_index?

np.delete(arr, row_index).

np.delete(arr, row_index, axis=0).

np.delete(arr, row_index, axis=1).

arr.delete(row_index, axis=0).

Question 10

How can you delete a single element from a numpy array?

np.delete(arr, index)

np.remove(arr, index)

arr.delete(index)

arr.remove(index)

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