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What is the issue with this code snippet when slicing a NumPy array?

medium📝 Debug Q6 of 15
NumPy - Indexing and Slicing
What is the issue with this code snippet when slicing a NumPy array?
import numpy as np
arr = np.array([[7,8,9],[10,11,12]])
slice = arr[2:4, 1:3]
AThe array is not defined properly before slicing
BThe column slice exceeds the array's column dimension causing an error
CThe slicing syntax is invalid due to missing commas
DThe row slice exceeds the array's row dimension causing an empty slice
Step-by-Step Solution
Solution:
  1. Step 1: Check array shape

    The array has shape (2, 3), meaning 2 rows and 3 columns.
  2. Step 2: Analyze slicing indices

    The slice arr[2:4, 1:3] tries to access rows from index 2 to 3 (exclusive), but the array only has rows 0 and 1.
  3. Final Answer:

    The row slice is out of bounds but NumPy returns an empty array instead of error -> Option D
  4. Quick Check:

    Row slice beyond array size returns empty slice [OK]
Quick Trick: Slicing beyond rows returns empty array, no error [OK]
Common Mistakes:
  • Assuming slicing beyond array size raises an error
  • Confusing row and column indices
  • Forgetting zero-based indexing

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