Given a 3D NumPy array arr with shape (2, 3, 4), which transpose() call will reorder the axes so that the second axis is first, the third axis is second, and the first axis is last?

hard📝 Application Q9 of 15

NumPy - Array Manipulation

Given a 3D NumPy array arr with shape (2, 3, 4), which transpose() call will reorder the axes so that the second axis is first, the third axis is second, and the first axis is last?

Aarr.transpose(2, 1, 0)

Barr.transpose(1, 2, 0)

Carr.transpose(0, 2, 1)

Darr.transpose(2, 0, 1)

Step-by-Step Solution

Solution:

Step 1: Understand original axes
Original shape is (2, 3, 4) corresponding to axes 0, 1, 2.
Step 2: Desired order
Second axis (1) first, third axis (2) second, first axis (0) last.
Step 3: Apply transpose
Use arr.transpose(1, 2, 0) to reorder axes accordingly.
Final Answer:
arr.transpose(1, 2, 0) -> Option B
Quick Check:
Check new shape is (3, 4, 2) [OK]

Quick Trick: Transpose axes in desired order as tuple [OK]

Common Mistakes:

Mixing up axis indices
Using default transpose which reverses axes
Passing incorrect tuple order

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More NumPy Quizzes

Given a 3D NumPy array arr with shape (2, 3, 4), which transpose() call will reorder the axes so that the second axis is first, the third axis is second, and the first axis is last?

Step 1: Understand original axes

Step 2: Desired order

Step 3: Apply transpose

Final Answer:

Quick Check:

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