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Automatic Differentiation
Automatic Differentiation
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Difficulty 4-6
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Intermediate
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4 intermediate
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Question 1 of 4
120s
intermediate (4/10)
conceptual
For
f
:
R
n
→
R
with large
n
, why is reverse-mode autodiff the usual choice for training?
Hide and think first
A.
Reverse mode works only for linear functions, where the Jacobian is constant.
B.
Reverse mode gets the full gradient in one backward sweep from a scalar-output seed.
C.
Reverse mode avoids the chain rule, replacing derivatives with finite differences.
D.
Reverse mode is faster because it forms the full Jacobian matrix before multiplying.
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