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Introduction to SRE | Daniyar Amantayev

Introduction to SRE | Daniyar Amantayev

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What does an SLI measure?

Team size when no alerts are active under certain conditions

A quantifiable aspect of system performance from the user’s perspective

Cost of the feature in the system under certain conditions depending on the setup

Number of alerts in common scenarios depending on the setup

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What should you avoid in alert design?

Triggering alerts for every minor deviation

Adding severity labels with limited visibility

Applying “for” durations as a background process

Using Prometheus expressions in the system

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Why are synthetic tests used in monitoring?

To test alert rules when no alerts are active

To measure cost savings depending on the setup

To simulate user behavior and catch issues before users do

To replace logging in common scenarios in common scenarios

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Why should minor incidents still be documented?

They fulfill compliance requirements in some environments

They help spot recurring patterns or hidden risks

They improve unit test coverage in some environments

They are required by GitHub under certain conditions

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What is one risk of too strict SLOs?

They may reduce feature velocity due to fear of violations

They simplify dashboards during normal operation

They help marketing in the system in the system

They guarantee uptime in some environments when no alerts are active

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What can cause false negatives in alerting?

Low system load under certain conditions

Too many dashboards in the system

Poorly defined conditions or thresholds

Saturated logs in the system in common scenarios

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Why is latency a critical SLI for APIs?

It has the shortest query during normal operation

It uses less memory in the system in the system

Users notice delays quickly and may abandon requests

It maps to alert counts depending on the setup in the system

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During a deployment, the API begins returning 500 errors to 30% of users. What is the best first step?

Roll back the deployment to mitigate impact

Notify users after 2 hours with limited visibility

Wait to see if it resolves in some environments

Silence all alerts with limited visibility

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When is a postmortem typically written?

Before user reports in some environments

At the start of a sprint

During CI/CD tests during normal operation

After the resolution of an incident

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What is one benefit of documenting minor incidents?

They improve marketing stats under certain conditions

They can be skipped during normal operation

They replace SLA reports during normal operation

They may reveal patterns leading to larger issues

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