Google PCA Practice Question: Analysing and Optimising Technical and Business Processes
A company wants to define an SLO for their application's availability. They measure that the application was down for 30 minutes in a 30-day period. What is the availability SLO that they can achieve?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
99.9%
Availability = (total time - downtime) / total time. 30 days = 43200 minutes. (43200 - 30) / 43200 = 99.93%. The closest higher but achievable SLO would be 99.9%, because 99.95% would allow only 21.6 minutes downtime. Typically SLOs are stated as 99.9%, 99.95%, etc.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
99.5%
Why it's wrong here
99.5% allows ~216 minutes; achievable but not the best answer.
- ✓
99.9%
Why this is correct
99.9% allows 43.2 minutes downtime per month; 30 minutes is within that.
- ✗
99.99%
Why it's wrong here
99.99% allows ~4.3 minutes; far too low.
- ✗
99.95%
Why it's wrong here
99.95% allows only ~21.6 minutes; 30 minutes exceeds that.
Go deeper
Related to this question
Learn chapter
Identity and Access Management (IAM)
Key term
SLO
A Service Level Objective is a measurable target for a specific aspect of a service's performance or reliability that a team commits to meeting over a defined period.
Key term
CAN
A CAN (Controller Area Network) is a robust vehicle bus standard designed to allow microcontrollers and devices to communicate with each other without a host computer.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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