This AZ-900 practice question tests your understanding of describe cloud concepts. 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 statement accurately describes the relationship between availability and SLA percentage?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Higher SLA percentages mean less allowed downtime and typically require more redundancy
B is correct because SLA (Service Level Agreement) percentage directly correlates to the maximum allowed downtime. A higher SLA percentage, such as 99.99% versus 99%, permits less downtime per year (approximately 52.56 minutes vs. 3.65 days). To achieve higher SLAs, Azure requires implementing redundancy across availability zones or regions, as a single instance typically cannot meet the uptime guarantee.
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.
✗
A 99.9% SLA allows for more downtime per year than a 99% SLA
Why it's wrong here
Higher SLA percentage = less allowed downtime; 99.9% allows far less downtime than 99%.
✓
Higher SLA percentages mean less allowed downtime and typically require more redundancy
Why this is correct
Higher SLA = less allowed downtime. 99% allows ~87.6 hours/year; 99.99% allows only ~52 minutes/year.
Related concept
Read the scenario before looking for a memorised answer.
✗
SLA percentage has no practical impact on allowed downtime
Why it's wrong here
SLA percentage directly determines the maximum allowed downtime per year.
✗
All Azure services provide the same SLA regardless of configuration
Why it's wrong here
Different services and configurations have different SLAs; redundancy options significantly affect SLA.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the relationship between SLA percentage and downtime, mistakenly thinking a higher percentage allows more downtime, or they assume all Azure services have a uniform SLA, ignoring the impact of redundancy and configuration.
Detailed technical explanation
How to think about this question
Under the hood, Azure calculates SLA credits based on a monthly uptime percentage, where downtime is measured in minutes and excludes scheduled maintenance. For a 99.99% SLA, the maximum monthly downtime is 4.38 minutes, which demands at least two instances in an availability set or across availability zones to meet the redundancy requirement. In a real-world scenario, a single VM without redundancy might experience 15 minutes of unplanned downtime, triggering a 10% service credit for the month, but the SLA itself is not guaranteed unless the deployment meets the specified redundancy conditions.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-900 question in full detail.
Describe cloud concepts — This question tests Describe cloud concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Higher SLA percentages mean less allowed downtime and typically require more redundancy — B is correct because SLA (Service Level Agreement) percentage directly correlates to the maximum allowed downtime. A higher SLA percentage, such as 99.99% versus 99%, permits less downtime per year (approximately 52.56 minutes vs. 3.65 days). To achieve higher SLAs, Azure requires implementing redundancy across availability zones or regions, as a single instance typically cannot meet the uptime guarantee.
What should I do if I get this AZ-900 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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