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Introduction to SRE | Daniyar Amantayev

Introduction to SRE | Daniyar Amantayev

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Why are synthetic tests used in monitoring?

To replace logging in common scenarios in common scenarios

To measure cost savings depending on the setup

To simulate user behavior and catch issues before users do

To test alert rules when no alerts are active

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What does an SLI measure?

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

Team size when no alerts are active under certain conditions

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

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

Applying “for” durations as a background process

Using Prometheus expressions in the system

Adding severity labels with limited visibility

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What is one risk of too strict SLOs?

They guarantee uptime in some environments when no alerts are active

They may reduce feature velocity due to fear of violations

They help marketing in the system in the system

They simplify dashboards during normal operation

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Why should minor incidents still be documented?

They fulfill compliance requirements in some environments

They are required by GitHub under certain conditions

They help spot recurring patterns or hidden risks

They improve unit test coverage in some environments

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Why is latency a critical SLI for APIs?

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

It has the shortest query during normal operation

Users notice delays quickly and may abandon requests

It uses less memory in the system 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?

Wait to see if it resolves in some environments

Roll back the deployment to mitigate impact

Notify users after 2 hours with limited visibility

Silence all alerts with limited visibility

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What can cause false negatives in alerting?

Too many dashboards in the system

Poorly defined conditions or thresholds

Saturated logs in the system in common scenarios

Low system load under certain conditions

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When is a postmortem typically written?

Before user reports in some environments

During CI/CD tests during normal operation

After the resolution of an incident

At the start of a sprint

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What is one benefit of documenting minor incidents?

They replace SLA reports during normal operation

They improve marketing stats under certain conditions

They may reveal patterns leading to larger issues

They can be skipped during normal operation

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