The answer is enabling data compression on large tables and analyzing wait stats for PAGEIOLATCH waits. These two actions directly address I/O bottlenecks because PAGEIOLATCH waits indicate that queries are waiting for data pages to be read from disk into memory, a classic sign of I/O pressure, while data compression reduces the physical size of tables, lowering the number of pages read per query and thus decreasing I/O demand. On the Microsoft Azure Database Administrator Associate DP-300 exam, this question tests your ability to distinguish between I/O-specific wait types and other performance metrics—common traps include confusing PAGEIOLATCH with CPU-related waits like SOS_SCHEDULER_YIELD or misinterpreting DTU/resource usage as per-query I/O. A useful memory tip: think “PAGEIOLATCH = I/O bottleneck, compress to reduce load,” and remember that scaling compute alone does not fix underlying I/O contention.
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. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 TWO actions can help you identify and resolve performance bottlenecks related to I/O in an Azure SQL Database?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Query sys.dm_exec_requests and filter on wait_type like PAGEIOLATCH.
Option A and D are correct. Option A identifies I/O bottlenecks by analyzing wait stats (PAGEIOLATCH). Option D reduces I/O by enabling compression. Option B is wrong because it shows CPU/memory, not I/O. Option C is wrong because it shows resource usage, not per query I/O. Option E is wrong because scaling compute doesn't directly address I/O.
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.
✓
Query sys.dm_exec_requests and filter on wait_type like PAGEIOLATCH.
Why this is correct
PAGEIOLATCH waits indicate I/O bottlenecks.
Related concept
Read the scenario before looking for a memorised answer.
✓
Enable data compression on large tables to reduce I/O.
Why this is correct
Compression reduces page reads, improving I/O.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the database service tier to add more compute resources.
Why it's wrong here
Scaling compute may not resolve I/O bottlenecks; storage is separate.
✗
Use sys.dm_db_resource_stats to see average I/O per minute.
Why it's wrong here
Shows resource consumption but not per query I/O.
✗
Monitor sys.dm_os_performance_counters for CPU usage.
Why it's wrong here
CPU counters don't directly show I/O.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
Shows resource consumption but not per query I/O.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-300 question in full detail.
Identify which DP-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Monitor, configure, and optimize database resources — This question tests Monitor, configure, and optimize database resources — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Query sys.dm_exec_requests and filter on wait_type like PAGEIOLATCH. — Option A and D are correct. Option A identifies I/O bottlenecks by analyzing wait stats (PAGEIOLATCH). Option D reduces I/O by enabling compression. Option B is wrong because it shows CPU/memory, not I/O. Option C is wrong because it shows resource usage, not per query I/O. Option E is wrong because scaling compute doesn't directly address I/O.
What should I do if I get this DP-300 question wrong?
Identify which DP-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This DP-300 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 DP-300 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.