DP-300 Practice Question: Monitor, configure, and optimize database resources
This DP-300 practice question tests your understanding of monitor, configure, and optimize database resources. 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.
Your Azure SQL Database is experiencing a sudden increase in wait time due to PAGEIOLATCH_SH waits. What should you do to reduce these waits?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add appropriate indexes to reduce table scans
Option D is correct because PAGEIOLATCH_SH waits indicate I/O bottlenecks; adding indexes can improve data access patterns and reduce I/O. Option A is wrong because increasing memory will not directly reduce I/O waits if the issue is inefficient queries. Option B is wrong because enabling compression may increase CPU but not necessarily reduce I/O waits. Option C is wrong because forcing parameterization may help plan stability but not I/O.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 database max memory
Why it's wrong here
Increasing memory may help cache more data but does not address the root cause of excessive I/O.
✓
Add appropriate indexes to reduce table scans
Why this is correct
Adding indexes reduces the number of pages read, directly reducing PAGEIOLATCH_SH waits.
Related concept
Static NAT maps one inside address to one outside address.
✗
Enable page compression on large tables
Why it's wrong here
Page compression reduces storage but may increase CPU; it may not reduce I/O waits significantly.
✗
Force parameterization of queries
Why it's wrong here
Forced parameterization helps with plan reuse but does not reduce I/O waits.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-300 question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DP-300 NAT questions on configuration and troubleshooting.
Monitor, configure, and optimize database resources — This question tests Monitor, configure, and optimize database resources — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Add appropriate indexes to reduce table scans — Option D is correct because PAGEIOLATCH_SH waits indicate I/O bottlenecks; adding indexes can improve data access patterns and reduce I/O. Option A is wrong because increasing memory will not directly reduce I/O waits if the issue is inefficient queries. Option B is wrong because enabling compression may increase CPU but not necessarily reduce I/O waits. Option C is wrong because forcing parameterization may help plan stability but not I/O.
What should I do if I get this DP-300 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DP-300 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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