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Linux Foundation HFCP Exam - Topic 4 Question 18 Discussion

Actual exam question for Linux Foundation's HFCP exam

Question #: 18
Topic #: 4

[All HFCP Questions]

What happens if the user submits a transaction with no matching function?

AThe peer will have rejected the transaction.

BNothing, the transaction is ignored.

CThe first transaction function is called.

DThe unknownTransaction function is called.

Show Suggested Answer

Suggested Answer: D

In Hyperledger Fabric, if a user submits a transaction with no matching function specified in the smart contract, the unknownTransaction function is invoked by default. This function serves as a catch-all method that can be used to handle cases where the transaction type is not recognized, providing a mechanism to manage or log these occurrences effectively .

by Alva at Sep 17, 2024, 02:24 AM

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Lindsey

10 months ago

I agree with A, can't process what it doesn't recognize!

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Cassie

10 months ago

Wait, are you sure about that? I thought it would just error out.

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Erin

10 months ago

Definitely D, the unknownTransaction function should handle it!

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Helene

10 months ago

I think B makes more sense, it just gets ignored.

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Corinne

11 months ago

A is correct, the peer will reject it.

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Therese

11 months ago

I'm leaning towards the idea that the peer rejects the transaction, but I might be mixing it up with another topic we covered.

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Javier

11 months ago

I feel like I saw a question similar to this where an unknown function was called, but I can't recall the details.

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Crista

11 months ago

I remember something about transactions being ignored if they don't match, but that seems too simple.

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Carman

11 months ago

I think if there's no matching function, the transaction gets rejected, but I'm not entirely sure.

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Bok

11 months ago

I'm a little confused on this one. I know that if there's no matching function, the transaction can't be processed, but I'm not sure if that means it gets rejected or just ignored. I'll have to review the material again before deciding.

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Lavera

11 months ago

Okay, let me think this through step-by-step. If there's no matching function, the transaction can't be executed, so it seems like the most logical answer would be that it gets rejected. I'll go with option A.

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Teddy

11 months ago

Hmm, I'm not sure about this one. I'm thinking it might just get ignored, but I could be wrong. I'll have to think it through a bit more.

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Amber

12 months ago

I'm pretty sure the transaction will be rejected, so I'll go with option A.

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Erasmo

12 months ago

I'm a bit confused; I thought upgrade notifications were sometimes sent via email, but I guess that's more about alerts than actual logs.

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Gail

2 years ago

D is the way to go. Although, I'm curious if the 'unknownTransaction' function has easter eggs. Maybe it orders pizza automatically?

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Dyan

2 years ago

I wonder what other surprises the unknownTransaction function has.

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Kathrine

2 years ago

That would be cool if it ordered pizza automatically!

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Dortha

2 years ago

D is correct. The unknownTransaction function is called.

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Susana

2 years ago

I'm not sure, but I think it could also be D) The unknownTransaction function is called. It makes sense to handle unknown transactions that way.

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Kristofer

2 years ago

I agree with Deangelo, because if there's no matching function, the transaction should be rejected.

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Theron

2 years ago

I'm going with C. It's like the default case in a switch statement - gotta catch 'em all!

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Isaac

2 years ago

B is tempting, but I'd rather not have the transaction ignored. Imagine the chaos if that happened in production!

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Terina

2 years ago

D) The unknownTransaction function is called.

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Dyan

2 years ago

D) The unknownTransaction function is called.

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Lajuana

2 years ago

B) Nothing, the transaction is ignored.

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Gary

2 years ago

A) The peer will have rejected the transaction.

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Tayna

2 years ago

A) The peer will have rejected the transaction.

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Polly

2 years ago

Option D seems the most logical, but my gut says A. I really hope the 'unknownTransaction' function isn't filled with glitter bombs!

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Willodean

2 years ago

I agree, it's better to go with option A to avoid any issues.

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Elouise

2 years ago

I think option A is correct. The peer will reject the transaction.

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Deangelo

2 years ago

I think the answer is A) The peer will have rejected the transaction.

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