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CloudWatch Composite Alarms

5 minutes 5 Questions

CloudWatch Composite Alarms allow you to combine multiple alarms to create a more sophisticated and accurate alerting system. Composite alarms are designed to reduce false positives and increase the reliability of your alarm configuration by only triggering an alarming state when multiple condition…

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AWS Certified Solutions Architect - CloudWatch Composite Alarms Example Questions

Test your knowledge of CloudWatch Composite Alarms

Question 1

A media company wants to ensure high-quality streaming for viewers. They need to set up a composite alarm in AWS CloudWatch that triggers when the average number of active TCP connections exceeds 3000 and the number of playback errors is above 500. Which configuration should you use?

Correct Answer: tcp_connections_alarm and playback_errors_alarm

The correct answer is to use the 'and' configuration between the two alarms. This will ensure that when both thresholds for active TCP connections and playback errors are exceeded at the same time, the composite alarm is triggered. Other configurations wouldn't consider both conditions being met simultaneously, which is what the company requires for its monitoring.

Question 2

A company maintaining an online marketplace wants to set up a composite alarm in AWS CloudWatch. The alarm should trigger if the number of 4xx errors exceeds 500, and the number of 5xx errors doesn't exceed 100 within the same time period. Which configuration should you use?

Correct Answer: errors_4xx_alarm and not errors_5xx_alarm

The correct answer is to use the 'and' configuration with the 'not' operator for the errors_5xx_alarm. The composite alarm should be configured to trigger only if 4xx errors exceed 500, and 5xx errors don't exceed 100. Using other configurations wouldn't consider both conditions being met simultaneously, as required by the question.

Question 3

Your organization wants to set up an AWS CloudWatch composite alarm that only triggers when the average latency is over 300ms, and either the network input rate is higher than 5 MB/s or the network output rate is higher than 5MB/s. What is the correct composite alarm configuration?

Correct Answer: latency_alarm and (network_input_alarm or network_output_alarm)

The correct answer is to use the 'and' operator for the latency_alarm with the 'or' operator for the network_input_alarm and network_output_alarm. This will trigger the composite alarm based on the required conditions, where average latency must exceed 300ms and at the same time, either input or output rate must exceed 5 MB/s. Any other configuration would not meet these specific criteria.

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