hardMultiple ChoiceObjective-mapped
MB-920 Practice Question: Contoso Retail is a mid-sized company with 50…
Contoso Retail is a mid-sized company with 50 physical stores and an online store. They use Dynamics 365 Commerce. Recently, they launched a promotion offering 20% off on all electronics for a weekend. During the promotion, the online store experienced slow page load times, and some customers reported errors when adding items to the cart. The IT team checked the infrastructure and found that the Retail Server CPU usage was at 95%, and the channel database had high lock contention. The POS systems in stores were working fine. The company uses a single Retail Server instance and a single channel database for all channels. What is the best course of action to prevent this issue in future promotions?
⚠ Common exam trap
Many exam-takers think the issue is client-side (e.g., POS or offline mode) or can be solved by reducing demand, rather than recognizing that the bottleneck is server-side capacity (Retail Server and channel database) that must be scaled to match peak load.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Scale out the Retail Server and channel database to handle increased load.
The issue stems from a single Retail Server and single channel database being overwhelmed by the combined load of online and POS traffic during the promotion. Scaling out the Retail Server (e.g., adding more instances behind a load balancer) and the channel database (e.g., using a dedicated online channel database or scaling up/out the existing one) directly addresses the high CPU usage and lock contention, ensuring adequate capacity for future high-traffic events.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Disable the online store during promotions to ensure POS performance.
Why it's wrong here
This would lose online sales.
- ✓
Scale out the Retail Server and channel database to handle increased load.
Why this is correct
Adding more resources will improve performance.
- ✗
Configure the online store to use offline mode.
Why it's wrong here
Offline mode is for POS, not for the online store.
- ✗
Reduce the promotion discount to 10% to lower traffic.
Why it's wrong here
This is a business decision, not a technical fix.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This MB-920 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the MB-920 exam.