The correct choice is to optimize the most critical database queries and add caching, as this directly embodies the ITIL 4 guiding principle of "Progress iteratively with feedback." Rather than attempting a risky, costly full-system rewrite or database replacement, this option starts where you are by measuring the current system’s performance, making a targeted improvement to the root cause (inefficient queries), and then gathering feedback from the results before deciding on the next incremental step. On the ITIL 4 Foundation exam, this scenario tests your ability to apply the guiding principles to real-world constraints like limited budget and zero tolerance for downtime—a common trap is choosing a flashy, high-risk transformation instead of a low-risk, iterative improvement. Remember the memory tip: "Start small, measure, adjust"—if the solution involves a massive overhaul, it likely violates the principle of progressing iteratively with feedback.
ITIL4F ITIL Guiding Principles Practice Question
This ITIL4F practice question tests your understanding of itil guiding principles. 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 medium-sized e-commerce company uses a legacy on-premise ordering system. The system experiences intermittent slowdowns during peak hours, causing customer frustration. The IT team has been asked to improve performance. They have identified that the database queries are inefficient and that the system's architecture is tightly coupled. The team proposes three options: (1) Rewrite the entire system using microservices on the cloud, (2) Optimize the most critical database queries and add caching, or (3) Replace the entire database with a NoSQL solution. The company has limited budget and cannot afford long downtime. Which course of action best aligns with the ITIL guiding principles?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Optimize the most critical database queries and add caching
Option D is correct because it aligns with the ITIL guiding principles of 'Start where you are' and 'Progress iteratively with feedback'. By optimizing the most critical database queries and adding caching, the company addresses the root cause of the performance issue (inefficient queries) with minimal cost and downtime, avoiding the high risk and expense of a full system rewrite or database replacement.
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.
✗
Rewrite the entire system using microservices on the cloud
Why it's wrong here
This is high-risk, costly, and does not start where you are; it may not deliver value given the constraints.
✗
Replace the entire database with a NoSQL solution
Why it's wrong here
This is a large change that may not address the root cause and introduces significant risk.
✗
Do nothing and accept the performance issues
Why it's wrong here
This ignores the need for improvement and does not focus on value.
✓
Optimize the most critical database queries and add caching
Why this is correct
This is a practical, iterative improvement that leverages existing assets and minimizes risk.
Clue confirmation
The clue word "best" 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
The trap here is that candidates may choose a 'modern' solution like microservices or NoSQL without considering the constraints of limited budget and downtime, forgetting that ITIL guiding principles prioritize incremental, value-focused improvements over wholesale architectural changes.
Detailed technical explanation
How to think about this question
Database query optimization involves analyzing execution plans using tools like EXPLAIN in MySQL or PostgreSQL to identify full table scans or missing indexes, then adding composite indexes or rewriting JOINs. Caching, such as with Redis or Memcached, stores frequently accessed query results in memory, reducing database load by up to 90% for read-heavy workloads. In a tightly coupled legacy system, this targeted approach avoids the complexity of schema migration or service decomposition while delivering measurable performance gains.
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.
TExam Day Tips
→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 ITIL4F 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
ITIL Guiding Principles — This question tests ITIL Guiding Principles — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Optimize the most critical database queries and add caching — Option D is correct because it aligns with the ITIL guiding principles of 'Start where you are' and 'Progress iteratively with feedback'. By optimizing the most critical database queries and adding caching, the company addresses the root cause of the performance issue (inefficient queries) with minimal cost and downtime, avoiding the high risk and expense of a full system rewrite or database replacement.
What should I do if I get this ITIL4F question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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 →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company is implementing a new ticketing system. The project team decides to use a large rollout after months of development, but later discovers many issues that could have been caught early. Which principle was NOT followed?
medium
A.Focus on value
B.Optimise and automate
✓ C.Progress iteratively with feedback
D.Keep it simple and practical
Why C: 'Progress iteratively with feedback' advises against big-bang approaches and encourages timeboxed iterations with continuous feedback. The team ignored this by not iterating.
Last reviewed: Jun 11, 2026
Question Discussion
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This ITIL4F practice question is part of Courseiva's free PeopleCert 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 ITIL4F exam.
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