Discuss Salesforce Salesforce Accredited B2B Commerce Developer Professional (AP-202) Exam Topic 4 Question 84

Which category can receive signaling from a Lightning Message Channel?

Aonly descendents (i.e. children)

Bonly direct siblings

Cpage (anywhere on it)

Donly ancestors (i.e. parents)

Suggested Answer: C

A Lightning Message Channel can receive signaling from any component on a page (anywhere on it). A Lightning Message Channel is a service that allows components to communicate with each other across different Salesforce UI technologies, such as Aura, LWC, Visualforce, and Lightning web apps. A component can subscribe to a message channel and receive events that are published by another component on the same or different page. The message channel acts as a mediator that delivers the events to the subscribers. A Lightning Message Channel does not receive signaling only from descendants (i.e., children), only from direct siblings, or only from ancestors (i.e., parents), as these are limitations of event-based communication. Salesforce Reference: [Lightning Web Components Developer Guide: Communicate Across Salesforce UI Technologies], [Lightning Web Components Developer Guide: Communicate with Events]

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30 comments · newest first

Mitzie 7 months ago

C) page is definitely the most inclusive. I support that answer!

Laticia 7 months ago

I’m leaning towards B) only direct siblings. It’s more structured.

Jolanda 7 months ago

I feel like C) is the best choice. It allows broader communication.

Freeman 7 months ago

But what about A) only descendents? That could be a valid option too.

Ivory 8 months ago

I think it's C) page. It makes sense for any part of the page to receive signals.

Malinda 8 months ago

C sounds right, but I’m surprised it’s not just for direct connections!

Brynn 8 months ago

I thought it was only for descendents, like A.

Percy 9 months ago

Wait, are you sure about that? I thought it was just for siblings.

Joanna 9 months ago

Totally agree with C! Makes the most sense.

Anisha 9 months ago

I think it's C) page (anywhere on it).

Ethan 9 months ago

I'm going with A. Descendants (i.e. children) are the only ones who can receive the lightning-fast messages.

Eric 9 months ago

B seems like the logical choice. Direct siblings are the only ones who can hear the secret Lightning Message Channel.

Marylyn 9 months ago

Hmm, I'm not sure. Is it possible to receive signaling from a Lightning Message Channel while taking a lightning bolt to the face? Asking for a friend.

Aide 10 months ago

D is the correct answer. Only ancestors (i.e. parents) can receive signaling from a Lightning Message Channel.

Jessenia 10 months ago

I feel like it’s either A or C, but I can’t recall the specifics about how the channels work.

Rana 10 months ago

I practiced a similar question where it mentioned only children could receive signals. I wonder if that applies here too.

Glenn 10 months ago

I remember something about siblings and ancestors, but I’m not sure if they can receive signals. This is tricky!

Aretha 10 months ago

I think the Lightning Message Channel can signal to any component on the page, so I’m leaning towards option C.

Hillary 10 months ago

This seems like the kind of question where I need to visualize how the Lightning Message Channel works. Time to sketch it out.

Alayna 11 months ago

I think the answer is C. The page can receive signaling from a Lightning Message Channel.

Stephaine 11 months ago

I'm a little confused by the wording of the question. Can the channel send signals to multiple categories or just one?

Tyra 11 months ago

I'm pretty sure the answer is C, but I want to make sure I'm not missing something. Gotta read the question closely.

Freeman 11 months ago

I agree, C) page seems right. Flexibility is key in messaging.

Justine 11 months ago

Okay, I think I know this one. Let me double-check the material on Lightning Message Channels.

Rima 12 months ago

Hmm, this one seems tricky. I'll need to think through the different options carefully.

Kathrine 6 months ago

↳ replying to Rima

I agree with C. It makes the most sense for flexibility.

Ty 6 months ago

↳ replying to Rima

I’m confused! Why not B? Siblings could share signals.

Dallas 6 months ago

↳ replying to Rima

I’m leaning towards D. Parents should have the signal too.

Britt 7 months ago

↳ replying to Rima

But what about A? Only children could be a possibility.

Gail 7 months ago

↳ replying to Rima

I think it might be C. Signaling can happen anywhere on the page.

Salesforce Accredited B2B Commerce Developer Professional (AP-202) Exam - Topic 4 Question 84 Discussion