The answer is enabling Azure Monitor diagnostic settings to capture read and write requests, along with leveraging Azure Storage Analytics and reviewing metrics like Ingress. These three measures are correct because they directly provide the latency, throughput, and request-level data needed to monitor and optimize Azure Data Lake Storage Gen2 performance; diagnostic logs reveal specific request failures or throttling, while Storage Analytics offers granular latency metrics, and Ingress metrics help identify throughput bottlenecks. On the DP-203 exam, this question tests your ability to distinguish performance monitoring tools from cost or security features—a common trap is confusing tiering (which optimizes cost) or NSG flow logs (network security) with performance diagnostics. To remember, think "Logs, Metrics, Analytics" as the three pillars for performance insight, and avoid anything that doesn’t directly measure request handling or data movement.
DP-203 Practice Question: Secure, monitor, and optimize data storage and data processing
This DP-203 practice question tests your understanding of secure, monitor, and optimize data storage and data processing. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Which THREE measures should you implement to monitor and optimize the performance of Azure Data Lake Storage Gen2?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable Storage Insights to monitor capacity and transactions.
Option A is correct: Metrics like 'Ingress' help identify bottlenecks. Option C is correct: Diagnostic logs provide request details for troubleshooting. Option D is correct: Azure Storage Analytics offers latency and throughput data. Option B is incorrect: Tiering is for cost optimization, not performance monitoring. Option E is incorrect: NSG flow logs are for network security, not storage performance.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Enable Network Security Group flow logs for the storage account subnet.
Why it's wrong here
NSG flow logs are for network traffic analysis, not storage performance.
✓
Enable Storage Insights to monitor capacity and transactions.
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.
TExam Day Tips
→Write the block size before choosing the subnet.
→Check whether the question asks for hosts, subnets or a specific address range.
→Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-203 question in full detail.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related DP-203 subnetting questions on CIDR, address ranges, and subnet selection.
Secure, monitor, and optimize data storage and data processing — This question tests Secure, monitor, and optimize data storage and data processing — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Enable Storage Insights to monitor capacity and transactions. — Option A is correct: Metrics like 'Ingress' help identify bottlenecks. Option C is correct: Diagnostic logs provide request details for troubleshooting. Option D is correct: Azure Storage Analytics offers latency and throughput data. Option B is incorrect: Tiering is for cost optimization, not performance monitoring. Option E is incorrect: NSG flow logs are for network security, not storage performance.
What should I do if I get this DP-203 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related DP-203 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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Question Discussion
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