Task 1: Assist in a Root Cause Analysis DVA-C02 Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   A developer wants to create a single view that shows error rates, latency, and request counts for an application on one screen. Which AWS service should be used to build this view?

   • AAmazon CloudWatch Dashboards
   • BAWS CloudTrail event history
   • CAmazon Simple Notification Service (SNS) topics
   • DAWS Config rules
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   A developer is troubleshooting a failed AWS Elastic Beanstalk deployment. Which log source provides the most direct information about why the environment's health changed to 'Degraded'?

   • AAWS CloudTrail management events
   • BAWS Identity and Access Management (IAM) access logs
   • CAmazon CloudWatch billing alerts
   • DElastic Beanstalk environment events
   Reveal Solution Discussion Select an answer first
4. 13application · medium

   A developer is troubleshooting a performance issue in an application that processes orders. The application runs on Amazon EC2 instances and writes logs to CloudWatch Logs. The developer needs to track the time taken to process each order and identify orders that take longer than 5 seconds. Which approach should the developer use?

   • AParse the existing application logs with a CloudWatch Logs Insights query to calculate the average processing time.
   • BStore the processing time in a DynamoDB table and query it with the AWS CLI.
   • CEmit a custom metric using the CloudWatch embedded metric format (EMF) with the order processing time, then create a CloudWatch alarm.
   • DUse AWS X-Ray to trace each order and view the trace timeline in the X-Ray console.
   Reveal Solution Discussion Select an answer first
5. 14foundation · easy

   A developer needs to automatically detect when the error rate of an application exceeds 5% for 10 consecutive minutes. Which CloudWatch feature should be configured?

   • ACloudWatch Dashboard
   • BCloudWatch Alarm
   • CCloudWatch Logs Insights saved query
   • DAWS X-Ray trace
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   A developer is building a custom metric to track the number of active users in an application. The application runs on EC2 instances and writes logs to CloudWatch Logs. The developer wants to create a CloudWatch alarm that triggers when the number of active users exceeds 1000. Which approach should the developer use?

   • AStore the active user count in DynamoDB and use a Lambda function to create a CloudWatch alarm.
   • BUse the CloudWatch embedded metric format (EMF) to emit a metric named 'ActiveUsers' and create an alarm on that metric.
   • CUse a CloudWatch Logs Insights query to count log entries and create an alarm based on the query result.
   • DUse AWS X-Ray to trace user sessions and create an alarm on the trace count.
   Reveal Solution Discussion Select an answer first