[Solved] What is the output of the following code?import numpy as np arr = np.array([2, 4, 6, 8]) cum_sum = np.cumsum(arr) print(cum_sum) | NumPy

NumPy - Aggregation Functions

What is the output of the following code?

import numpy as np
arr = np.array([2, 4, 6, 8])
cum_sum = np.cumsum(arr)
print(cum_sum)

A[2 8 14 22]

B[2 4 6 8]

C[2 6 12 20]

D[20 18 14 8]

Step-by-Step Solution

Solution:

Step 1: Calculate cumulative sums stepwise
Start with 2, then 2+4=6, then 6+6=12, then 12+8=20.
Step 2: Form the cumulative sum array
The resulting array is [2, 6, 12, 20].
Final Answer:
[2 6 12 20] -> Option C
Quick Check:
Running total sums = [2, 6, 12, 20] [OK]

Quick Trick: Add each element to sum of all before it [OK]

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