MB-920 Describe Dynamics 365 Commerce Practice Question
This MB-920 practice question tests your understanding of describe dynamics 365 commerce. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A retail company is planning to expand its online presence and wants to use Dynamics 365 Commerce to build a new e-commerce site. They need to ensure that the site can handle high traffic during promotional events and that product catalog updates are reflected quickly. What should they consider?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use a content delivery network (CDN) and optimize catalog synchronization.
Option C is correct because using a Content Delivery Network (CDN) caches static assets (images, scripts, CSS) at edge nodes, reducing load on the origin server during high-traffic promotional events. Optimizing catalog synchronization (e.g., using incremental syncs and the Commerce Data Exchange) ensures product updates are reflected quickly without full re-indexing, maintaining performance and data freshness.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Increase the size of the channel database.
Why it's wrong here
Database size is not the primary factor for traffic handling or update speed.
✗
Disable caching for product pages to ensure fresh data.
Why it's wrong here
Disabling caching would degrade performance.
✓
Use a content delivery network (CDN) and optimize catalog synchronization.
Why this is correct
CDN helps with traffic, and optimizing sync ensures quick updates.
Related concept
Read the scenario before looking for a memorised answer.
✗
Limit the number of products in the catalog.
Why it's wrong here
Limiting products is not a scalable solution.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think disabling caching ensures fresh data (Option B), but in high-traffic scenarios, caching with proper invalidation (e.g., using cache tags or TTLs) is essential for both performance and data freshness.
Detailed technical explanation
How to think about this question
Dynamics 365 Commerce uses the Commerce Scale Unit (CSU) to serve product data, and CDN integration (e.g., Azure CDN) caches static content at Points of Presence (PoPs) globally, reducing origin requests by up to 80% during spikes. Catalog synchronization leverages the Commerce Data Exchange (CDX) for incremental updates, avoiding full synchronization jobs that can take hours for large catalogs. In real-world scenarios, a flash sale with 100,000 concurrent users would overwhelm an uncached origin but remain responsive with CDN caching and optimized sync intervals.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Describe Dynamics 365 Commerce — This question tests Describe Dynamics 365 Commerce — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use a content delivery network (CDN) and optimize catalog synchronization. — Option C is correct because using a Content Delivery Network (CDN) caches static assets (images, scripts, CSS) at edge nodes, reducing load on the origin server during high-traffic promotional events. Optimizing catalog synchronization (e.g., using incremental syncs and the Commerce Data Exchange) ensures product updates are reflected quickly without full re-indexing, maintaining performance and data freshness.
What should I do if I get this MB-920 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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