[Solved] The following code tries to implement a sliding window sum but has a bug. What is the error? data = [2, 4, 6, 8] window_size = 2 result = [] for i in range(len(data) - window_size):... | Rest API

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The following code tries to implement a sliding window sum but has a bug. What is the error?

data = [2, 4, 6, 8]
window_size = 2
result = []
for i in range(len(data) - window_size):
    window_sum = sum(data[i:i+window_size])
    result.append(window_sum)
print(result)

AThe result list is not initialized.

BThe sum function is used incorrectly.

CThe loop range misses the last window, causing incomplete results.

DWindow size is larger than data length.

Step-by-Step Solution

Solution:

Step 1: Analyze the loop range
The loop runs from 0 to len(data) - window_size - 1, which is 4 - 2 - 1 = 1, so only indices 0 and 1.
Step 2: Identify missing last window
The last valid window starts at index 2 (data[2:4]), but the loop excludes it because it should run to len(data) - window_size + 1.
Final Answer:
The loop range misses the last window, causing incomplete results. -> Option C
Quick Check:
Loop range must cover all windows [OK]

Quick Trick: Use range(len(data) - window_size + 1) for full coverage [OK]

Common Mistakes:

Using wrong loop range causing missed windows
Misusing sum function
Not initializing result list

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The following code tries to implement a sliding window sum but has a bug. What is the error?

Step 1: Analyze the loop range

Step 2: Identify missing last window

Final Answer:

Quick Check:

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