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Chepter-12

Question 1

How can you sort the rows of a 2D numpy array in descending order based on the sum of each row?

np.sort(arr, axis=0)

np.sort(arr, axis=1)

arr[arr.sum(axis=1).argsort()[::-1]]

None of the above

Question 2

What is the difference between np.sort() and arr.sort()?

np.sort() returns a sorted copy, arr.sort() sorts the array in place.

np.sort() sorts the array in place, arr.sort() returns a sorted copy.

Both functions return a sorted copy.

Both functions sort the array in place.

Question 3

What does the np.argsort() function return?

Sorted array

Indices that would sort the array

Array with unique elements

None of the above

Question 4

What is the time complexity of numpy's sorting algorithm for a 1D array?

O(n)

O(n^2)

O(n log n)

O(log n)

Question 5

What is the default sorting order in numpy's sort function?

Ascending

Descending

Random

Unspecified

Question 6

How can you sort the elements of a 2D numpy array based on the values in the second column?

np.sort(arr, axis=0)

np.sort(arr, axis=1)

arr[arr[:,1].argsort()]

Question 7

How can you sort the columns of a 2D numpy array in descending order?

np.sort(arr, axis=1)

np.sort(arr, axis=0)[::-1]

np.sort(arr, axis=0, order='desc')

None of the above

Question 8

Which numpy function can be used to sort the elements of an ndarray along a specific axis?

np.sort()

np.argsort()

np.lexsort()

np.sort(axis=1)

Question 9

Which parameter of the np.sort() function allows you to specify a sorting algorithm?

order

kind

algorithm

None of the above

Question 10

How can you sort the elements of a 1D numpy array in ascending order?

np.sort(arr)

arr.sort()

np.sort(arr, axis=0)

None of the above

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