The correct first action is to enable an in-memory caching solution like ElastiCache to reduce database load. This directly addresses the database bottleneck by storing frequently accessed query results in memory, which dramatically cuts read IOPS and connection counts on the MySQL RDS instance without requiring application code changes to the web tier. On the CompTIA Cloud+ CV0-004 exam, this scenario tests your understanding of the performance hierarchy: always optimize data access patterns before scaling infrastructure. A common trap is jumping to read replicas or resizing the database, but caching is the least disruptive and most cost-effective first step when CPU on web servers is low and the database shows high read pressure. Remember the mnemonic “Cache Before Scale” — when read IOPS spike and web CPU is fine, put a cache in line before you resize the database.
CV0-004 Operations and Support Practice Question
This CV0-004 practice question tests your understanding of operations and support. 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.
A cloud administrator manages a multi-tier web application running on AWS. The application consists of a load balancer, web servers in an auto scaling group, and a MySQL RDS database. Recently, users have reported slow page load times during peak hours. The cloud administrator has checked the load balancer metrics and found that response times are high, but CPU utilization on the web servers is below 60%. The RDS instance shows high read IOPS and a high number of database connections. The administrator suspects the database is the bottleneck. Which of the following actions should the administrator take FIRST to resolve the performance issue?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable an in-memory caching layer such as ElastiCache to reduce database load.
Option C is correct because enabling an in-memory caching layer (e.g., ElastiCache) reduces the number of read queries hitting the database, alleviating the bottleneck with minimal changes. Option A is wrong because read replicas only help if the database workload is read-heavy and if the application can route reads to replicas; caching is often a simpler first step. Option B is wrong because web server CPU is not high, so scaling web servers won't help. Option D is wrong because increasing the database instance size may help but is more expensive and disruptive; caching is more efficient initially.
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.
✗
Migrate the database to a larger instance class.
Why it's wrong here
Larger instance class can handle more IOPS but is a more costly and disruptive change than implementing caching.
✗
Add read replicas to offload read queries from the primary database.
Why it's wrong here
Read replicas require application changes to direct read traffic and may not address all queries; caching is less invasive.
✗
Increase the size of the web servers to handle more requests faster.
Why it's wrong here
Web server CPU is not saturated, so increasing size won't reduce response time.
✓
Enable an in-memory caching layer such as ElastiCache to reduce database load.
Why this is correct
Caching frequently accessed data reduces database reads and improves response times quickly.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
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.
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 practitioner preparing for the CV0-004 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which CV0-004 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.
Operations and Support — This question tests Operations and Support — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable an in-memory caching layer such as ElastiCache to reduce database load. — Option C is correct because enabling an in-memory caching layer (e.g., ElastiCache) reduces the number of read queries hitting the database, alleviating the bottleneck with minimal changes. Option A is wrong because read replicas only help if the database workload is read-heavy and if the application can route reads to replicas; caching is often a simpler first step. Option B is wrong because web server CPU is not high, so scaling web servers won't help. Option D is wrong because increasing the database instance size may help but is more expensive and disruptive; caching is more efficient initially.
What should I do if I get this CV0-004 question wrong?
Identify which CV0-004 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.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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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