[GH-ISSUE #976] Typo in Self-Check: Question 4.3 (CNNs) #1653

New Issue

GiteaMirror · 2026-04-11T08:00:17-05:00

GiteaMirror commented

2026-04-11 08:00:17 -05:00

Originally created by @VThuong99 on GitHub (Oct 12, 2025).
Original GitHub issue: https://github.com/harvard-edge/cs249r_book/issues/976

Description

There is a minor error in the multiple-choice question regarding CNN architectural features.

Current version:

Which architectural feature of CNNs allows them to efficiently
process spatially structured data?
a) Global connectivity
b) Parameter sharing
c) Both B and C
d) Local connectivity
Answer: The correct answer is C. Both B and C. CNNs use param-
eter sharing and local connectivity to efficiently process spatially
structured data, reducing the number of parameters and focusing
on local spatial relationships.

Issue:
Option labels are mismatched — “Both B and C” refers to “Parameter sharing” and “Local connectivity”, but “Local connectivity” is labeled as option d, not c.

Proposed fix:

Which architectural feature of CNNs allows them to efficiently
 process spatially structured data?
a) Global connectivity
b) Parameter sharing
c) Both B and D
d) Local connectivity
Answer: The correct answer is C. Both B and D. CNNs use param-
eter sharing and local connectivity to efficiently process spatially
structured data, reducing the number of parameters and focusing
on local spatial relationships.

Originally created by @VThuong99 on GitHub (Oct 12, 2025). Original GitHub issue: https://github.com/harvard-edge/cs249r_book/issues/976 ### Description There is a minor error in the multiple-choice question regarding CNN architectural features. **Current version:** ```markdown Which architectural feature of CNNs allows them to efficiently process spatially structured data? a) Global connectivity b) Parameter sharing c) Both B and C d) Local connectivity Answer: The correct answer is C. Both B and C. CNNs use param- eter sharing and local connectivity to efficiently process spatially structured data, reducing the number of parameters and focusing on local spatial relationships. ``` **Issue:** Option labels are mismatched — “Both B and C” refers to “Parameter sharing” and “Local connectivity”, but “Local connectivity” is labeled as option **d**, not **c**. **Proposed fix:** ```markdown Which architectural feature of CNNs allows them to efficiently process spatially structured data? a) Global connectivity b) Parameter sharing c) Both B and D d) Local connectivity Answer: The correct answer is C. Both B and D. CNNs use param- eter sharing and local connectivity to efficiently process spatially structured data, reducing the number of parameters and focusing on local spatial relationships.

GiteaMirror added the area: book label 2026-04-11 08:00:17 -05:00

GiteaMirror closed this issue

2026-04-11 08:00:18 -05:00

GiteaMirror commented

2026-04-11 08:00:18 -05:00

@VThuong99 commented on GitHub (Oct 12, 2025):

This typo is clear, so I will work on fixing it.

@VThuong99 commented on GitHub (Oct 12, 2025): This typo is clear, so I will work on fixing it.

GiteaMirror commented

2026-04-11 08:00:18 -05:00

@profvjreddi commented on GitHub (Oct 12, 2025):

Ah, thanks for pointing this out!

I need to be more cautious since I wrote a script to rebalance the quizzes.
Initially, i made most answers as "A" to allow for quick validation, and
then I used the script to shuffle the quiz answers, which is why I missed
this. I’ll review all the other quizzes as well.

Thanks 🙏

Vijay Janapa Reddi, Ph.D.
Gordon McKay Professor of Electrical Engineering
John A. Paulson School of Engineering and Applied Sciences
Harvard University

📍 150 Western Ave, Room 5.305,
Boston, MA 02134, USA (Google Maps
https://maps.app.goo.gl/ixd9WAgDbCGBwymC6)

🌐 Homepage https://vijay.seas.harvard.edu | 📚 Research
https://profvjreddi.github.io/homepage/research | 📕 Teaching
https://mlsysbook.org/ | 💻 GitHub https://github.com/profvjreddi | 📅
Calendar https://profvjreddi.github.io/homepage/contact | 🧑‍💼 Assistant
https://profvjreddi.github.io/homepage/contact#contact-methods

On Sat, Oct 11, 2025 at 11:43 PM, Thuong Duong @.***>
wrote:

VThuong99 left a comment (harvard-edge/cs249r_book#976)
https://github.com/harvard-edge/cs249r_book/issues/976#issuecomment-3393892679

This typo is clear, so I will work on fixing it.

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Reply to this email directly, view it on GitHub
https://github.com/harvard-edge/cs249r_book/issues/976#issuecomment-3393892679,
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@profvjreddi commented on GitHub (Oct 12, 2025): Ah, thanks for pointing this out! I need to be more cautious since I wrote a script to rebalance the quizzes. Initially, i made most answers as "A" to allow for quick validation, and then I used the script to shuffle the quiz answers, which is why I missed this. I’ll review all the other quizzes as well. Thanks 🙏 *Vijay Janapa Reddi, Ph.D.* *Gordon McKay Professor of Electrical Engineering* John A. Paulson School of Engineering and Applied Sciences Harvard University 📍 150 Western Ave, Room 5.305, Boston, MA 02134, USA (Google Maps <https://maps.app.goo.gl/ixd9WAgDbCGBwymC6>) 🌐 Homepage <https://vijay.seas.harvard.edu> | 📚 Research <https://profvjreddi.github.io/homepage/research> | 📕 Teaching <https://mlsysbook.org/> | 💻 GitHub <https://github.com/profvjreddi> | 📅 Calendar <https://profvjreddi.github.io/homepage/contact> | 🧑‍💼 Assistant <https://profvjreddi.github.io/homepage/contact#contact-methods> On Sat, Oct 11, 2025 at 11:43 PM, Thuong Duong ***@***.***> wrote: > *VThuong99* left a comment (harvard-edge/cs249r_book#976) > <https://github.com/harvard-edge/cs249r_book/issues/976#issuecomment-3393892679> > > This typo is clear, so I will work on fixing it. > > — > Reply to this email directly, view it on GitHub > <https://github.com/harvard-edge/cs249r_book/issues/976#issuecomment-3393892679>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/ABT6DFBXAU7OSCQEW3HZFWD3XHE5JAVCNFSM6AAAAACI6HFTMGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTGOJTHA4TENRXHE> > . > You are receiving this because you are subscribed to this thread.Message > ID: ***@***.***> >

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Reference: github-starred/cs249r_book#1653