Discuss PeopleCert DevOps-SRE Exam Topic 2 Question 67

Which of the following BEST describes the most important rationale for NOT seeking an SLO of 100% availability?

AIt is not realistic for the complexity and scale of services.

BThe likely result is failure where such targets are defined.

CThere is no room for improvements if targets are so high.

DThe user satisfaction score is affected by a low percent.

Suggested Answer: A

Comprehensive and Detailed Explanation From Exact Extract:

The SRE Book clearly states: ''A target of 100% availability is neither realistic nor economically viable at scale.'' Complex distributed systems inherently experience failures, network issues, hardware faults, and dependency outages. SRE emphasizes embracing this reality through error budgets, which assume some failure and allow engineering resources to be used efficiently.

The primary reason not to set 100% availability is that it is impossible to achieve reliably and leads to wasted engineering effort. SRE states: ''Chasing perfect reliability leads to dramatically increasing costs with diminishing returns.''

Option A captures this rationale precisely.

Options B, C, and D are secondary or incorrect interpretations and do not come directly from SRE principles.

Thus, A is the correct SRE-aligned answer.

Site Reliability Engineering, Chapter: ''Service Level Objectives.''

The Site Reliability Workbook, sections on Error Budgets and realistic SLOs.

Get Premium DevOps-SRE Questions as Interactive Web-Based Practice Test or PDF Real Exam Format Detailed Explanations Instant Access Get Your Practice Test

15 comments · newest first

Yuonne 1 month ago

I feel like A covers it all. Realistic goals are key for success.

Merissa 1 month ago

D seems off. User satisfaction can still be high with lower availability.

Azalee 2 months ago

True, but C is important too. No room for improvement if targets are too high.

Lura 2 months ago

B is also a good point. Setting such high targets can lead to failure.

Galen 2 months ago

I agree, A makes sense. Services are too complex.

Mel 2 months ago

I think A is the best choice. 100% availability is just not realistic.

Cecily 2 months ago

B) is true, setting that target just sets you up for failure.

Hannah 2 months ago

C) makes sense, too high and you can't improve anymore.

Rachael 3 months ago

Wait, are we really saying 100% is impossible?

Brittney 3 months ago

I disagree, aiming high can drive better performance!

Antonio 3 months ago

A) is spot on, 100% is just not feasible.

Silvana 3 months ago

I wonder if option D is relevant here; I think user satisfaction is important, but I'm not convinced it's the main reason for not aiming for 100% availability.

Kimberely 3 months ago

I feel like option C could be a valid point too, since if we aim for perfection, we might miss out on making gradual improvements.

Nathalie 3 months ago

I'm not entirely sure, but I remember a practice question that mentioned how setting such high targets could lead to failure, which might relate to option B.

Casie 4 months ago

I think option A makes sense because aiming for 100% availability seems unrealistic given how complex systems can be.

PeopleCert DevOps-SRE Exam - Topic 2 Question 67 Discussion