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ADS1001 - Data challenges 1 - S1 2025

ADS1001 - Data challenges 1 - S1 2025

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What does plt.savefig("figure.png") do?

Displays the plot.

Saves the plot as a PNG file.

Deletes the figure.

Saves the plot as a JPG file.

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What is the output of the following code:

import numpy as np

A = np.array([[200, 300],

[100, 400]])

B = np.array([[150, 100],

[400, 100]])

result = A + B

print(result)

[[ 350  400]
 [500 500]]

✅

[[ 300  700]
 [550 200]]

❌

[[200 300]
 [100 400]
 [150 100]
 [400 100]]

❌

ValueError: operands could not be broadcast together with different shapes

❌

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How do you create a NumPy array from a list [1, 2, 3, 4]?

np.array{1,2,3,4}

np.array([1,2,3,4])

np.list(1,2,3,4)

np.array(1,2,3,4)

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What is the output of the following snippet:

import numpy as np

import math

print(np.round(list(map(math.exp,[0,1,2])),2))

[1.   2.7 7.4]

AttributeError: module 'math' has no attribute 'exp'

[1.0, 2.718281828459045, 7.38905609893065]

[1.   2.72 7.39]

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Which of the following functions is used to compute the square root in the math module?

math.sqrt(x)

math.square(x)

math.sqr(x)

math.power(x, 2)

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What is the result of the following code:

import numpy as np

ar = np.array([0.5, 1, 7, 66, 234, 1000, 0.01])

print(ar[3:6])

[   7.   66.  234. 1000.]

❌

[  7.  66. 234.]

❌

[  66.  234. 1000.]

✅

[  66.  234. 1000. 0.01]

❌

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