np.ones() for one-filled arrays in NumPy - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a 1D array of length 5 filled with ones.

NumPy

import numpy as np
array = np.[1](5)
print(array)

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Aones

Bzeros

Cempty

Dfull

Attempts:

3 left

💡 Hint

Common Mistakes

Using np.zeros() which creates an array of zeros instead of ones.

Using np.empty() which creates an uninitialized array.

The np.ones() function creates an array filled with ones.

2fill in blank

medium

Complete the code to create a 2x3 array filled with ones.

NumPy

import numpy as np
array = np.ones([1])
print(array)

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A(3, 2)

B(2, 3)

C[2, 3]

D[3, 2]

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping rows and columns in the shape tuple.

Using a list instead of a tuple for the shape.

The shape argument for a 2 rows and 3 columns array is (2, 3).

3fill in blank

hard

Fix the error in the code to create a 3x3 array of ones with integer type.

NumPy

import numpy as np
array = np.ones((3, 3), dtype=[1])
print(array)

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Aint

B'float'

C'int'

Dinteger

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'integer' which is not a valid dtype string.

The dtype argument expects a string like 'int' to specify integer type.

4fill in blank

hard

Fill both blanks to create a 4x4 array of ones with float type and print its shape.

NumPy

import numpy as np
array = np.ones([1], dtype=[2])
print(array.shape)

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A(4, 4)

B'float'

C'int'

D(4,)

Attempts:

3 left

💡 Hint

Common Mistakes

Using a one-dimensional shape like (4,) instead of (4, 4).

Using 'int' instead of 'float' for dtype.

The shape should be (4, 4) for a 4x4 array, and dtype 'float' specifies floating point numbers.

5fill in blank

hard

Fill all three blanks to create a 2x5 array of ones with integer type and print the array.

NumPy

import numpy as np
array = np.ones([1], dtype=[2])
print([3])

Drag options to blanks, or click blank then click option'

A(2, 5)

B'int'

Carray

D'float'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'float' instead of 'int' for dtype.

Printing a wrong variable name.

The shape is (2, 5), dtype is 'int' for integers, and printing the variable array shows the result.