Deal of The Day! Hurry Up, Grab the Special Discount - Save 25% - Ends In 00:00:00 Coupon code: SAVE25
Welcome to Pass4Success

- Free Preparation Discussions
Mail Us support@pass4success.com
Location US
Mob_nav_barsMENU

Salesforce Certified MuleSoft Developer II (Mule-Dev-301) Exam - Topic 4 Question 37 Discussion

A Mule application need to invoice an API hosted by an external system to initiate a process. The external API takes anywhere between one minute and 24 hours to compute its process.Which implementation should be used to get response data from the external API after it completes processing?
D) Expose an HTTP callback API in Mule and register it with the external system
A) Use an HTTP Connector to invoke the API and wait for a response
B) Use a Scheduler to check for a response every minute
C) Use an HTTP Connector inside Async scope to invoice the API and wait for a response

Salesforce Certified MuleSoft Developer II (Mule-Dev-301) Exam - Topic 4 Question 37 Discussion

Actual exam question for Salesforce's Salesforce Certified MuleSoft Developer II (Mule-Dev-301) exam
Question #: 37
Topic #: 4
[All Salesforce Certified MuleSoft Developer II (Mule-Dev-301) Questions]

A Mule application need to invoice an API hosted by an external system to initiate a process. The external API takes anywhere between one minute and 24 hours to compute its process.

Which implementation should be used to get response data from the external API after it completes processing?

Show Suggested Answer Hide Answer
Suggested Answer: D

To get response data from the external API after it completes processing, the developer should expose an HTTP callback API in Mule and register it with the external system. This way, the external API can invoke the callback API with the response data when it is ready, instead of making the Mule application wait for a long time or poll for a response repeatedly. Reference: https://docs.mulesoft.com/mule-runtime/4.3/http-listener-ref#callback


by Monte at Nov 19, 2025, 01:02 PM

Limited Time Offer

25%

Off

Get Premium Salesforce Certified MuleSoft Developer II (Mule-Dev-301) Questions as Interactive Web-Based Practice Test or PDF

Contribute your Thoughts:

0/2000 characters
Submit Cancel
Annabelle
2 months ago
C is interesting, but still not as reliable as D.
upvoted 0 times
...
Louis
2 months ago
B could work, but it feels inefficient to poll every minute.
upvoted 0 times
...
Tequila
2 months ago
True, but A would just hang for too long. Not practical.
upvoted 0 times
...
Krystina
2 months ago
But what if the external system fails to call back?
upvoted 0 times
...
Frankie
2 months ago
I agree, D seems efficient. No need to keep checking.
upvoted 0 times
...
Tabetha
3 months ago
I think option D is the best. It allows for real-time updates.
upvoted 0 times
...
Verdell
3 months ago
Not sure about D, what if they don't support callbacks?
upvoted 0 times
...
Miriam
3 months ago
B is like checking the fridge every minute to see if the food is ready. Seems a bit overkill.
upvoted 0 times
...
Carlene
4 months ago
Option D is the way to go. Who wants to wait 24 hours for a response? Not me!
upvoted 0 times
...
Dean
4 months ago
I'd go with C. Async scope should be able to handle the long processing time.
upvoted 0 times
...
Tesha
4 months ago
B is a bit of a hack, but it might work if the external system is reliable.
upvoted 0 times
...
Ronald
4 months ago
D seems like the best option to me. Handling the callback from the external system is the way to go.
upvoted 0 times
...
Bev
4 months ago
Option C looks good, but I'm not sure if it can handle the 24-hour processing time.
upvoted 0 times
...
Delsie
4 months ago
I feel like option C could work, but using Async might complicate things if we need to handle the response properly.
upvoted 0 times
...
Lashaunda
5 months ago
I'm a bit confused about option B; checking every minute seems inefficient, but maybe it's a valid approach?
upvoted 0 times
...
Davida
5 months ago
I remember practicing a question similar to this, and I think option D makes sense because it allows the external system to notify us when it's done.
upvoted 0 times
...
Buddy
5 months ago
I think option A might be too risky since the response time can be so long, but I'm not entirely sure.
upvoted 0 times
...
Glendora
5 months ago
I'm leaning towards option B - a scheduled check for the response every minute. That seems like a straightforward way to handle the uncertainty around the processing time.
upvoted 0 times
...
Anna
5 months ago
Option D seems interesting, but I'm not sure how that would work in practice. I'd need to understand more about how to expose and register that HTTP callback API.
upvoted 0 times
...
Val
5 months ago
Wait, can the external API really take up to 24 hours? That’s wild!
upvoted 0 times
...
Dudley
6 months ago
A would just time out, right? Not a good choice.
upvoted 0 times
...
Ben
6 months ago
I agree, D is definitely the way to go!
upvoted 0 times
...
Odelia
6 months ago
D seems like the best option for handling long wait times.
upvoted 0 times
...
Cyril
6 months ago
I think option C might be the way to go here. Using an async scope to invoke the API and wait for the response seems like it could handle the variable processing time well.
upvoted 0 times
...
France
6 months ago
Hmm, I'm a bit confused by the time range for the external API processing. That's going to be an important factor in deciding the best approach.
upvoted 0 times
...
Brynn
7 months ago
This looks like a tricky one. I'll need to think carefully about the different options and their implications.
upvoted 0 times
Tonette
24 days ago
Option C seems interesting too, using async could help manage the wait time.
upvoted 0 times
...
Derick
30 days ago
I feel like that could lead to unnecessary load on the system.
upvoted 0 times
...
Alana
1 month ago
True, then maybe option B could work, checking every minute.
upvoted 0 times
...
Cristen
1 month ago
But what if the external system doesn't support callbacks?
upvoted 0 times
...
Elinore
2 months ago
I think option D is the best choice. It allows for a callback.
upvoted 0 times
...
...

Save Cancel