Task 3.3: Determine a Strategy to Improve Performance. SAP-C02 Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A company runs a web application on AWS that uses Amazon CloudFront for content delivery. The application is experiencing high error rates. The team has noticed that the error rate is higher for requests that are not cached. The team suspects that the origin server is the bottleneck. Which CloudFront metric should the team analyze to confirm this?

   • ATotalErrorRate, which measures the percentage of all requests that result in an error.
   • BCacheHitRate, which measures the percentage of requests that are served from the CloudFront cache.
   • CRequests, which measures the total number of requests received by CloudFront.
   • DOriginLatency, which measures the time from when CloudFront receives a request to when it starts sending the response to the viewer.
   Reveal Solution Discussion Select an answer first
2. 7application · medium

   A media company runs a web application on AWS that serves video thumbnails. The thumbnails are generated on-the-fly by an application server and stored in Amazon S3. The application is experiencing high latency during peak hours. The team has determined that the thumbnail generation process is CPU-intensive and the application servers are at 80% CPU utilization. Which solution will improve performance with the least operational overhead?

   • AStore the generated thumbnails in Amazon ElastiCache for Redis instead of S3 to speed up retrieval.
   • BRefactor the application to use a more efficient image-processing library to reduce CPU usage.
   • CPre-generate thumbnails using an AWS Lambda function triggered by an S3 event, and serve them directly from S3 via Amazon CloudFront.
   • DIncrease the instance size of the application servers to handle the CPU load during peak hours.
   Reveal Solution Discussion Select an answer first
4. 8application · medium

   A company runs a mobile application backend on AWS that uses Amazon API Gateway and AWS Lambda. The application is experiencing high latency. The team has noticed that the Lambda function is cold starting frequently. The function is written in Java and has a large deployment package. Which strategy will reduce the cold start latency?

   • AMove the Lambda function to a VPC to improve network latency and reduce cold starts.
   • BUse a custom runtime for the Lambda function to reduce the startup time.
   • CEnable provisioned concurrency on the Lambda function to keep a certain number of instances warm.
   • DIncrease the memory of the Lambda function to speed up the initialization process.
   Reveal Solution Discussion Select an answer first
5. 9expert · hard

   A company runs a web application on AWS that uses Amazon RDS for MySQL. The application is experiencing slow query performance. The team has identified that the slow queries are due to full table scans on a large table. The team is considering adding an index to the table. However, the table is frequently updated, and the team is concerned about the impact of the index on write performance. What should the team do to improve query performance while minimizing the impact on write performance?

   • APartition the large table to reduce the amount of data scanned for each query.
   • BUse a read replica to serve the slow queries, keeping the write workload on the primary instance.
   • CCreate the index and monitor the write performance to ensure it remains acceptable.
   • DRefactor the application to use a NoSQL database that is optimized for write-heavy workloads.
   Reveal Solution Discussion Select an answer first
6. 10foundation · easy

   A solutions architect wants to reduce the load on a database by storing frequently accessed data in a faster storage layer. Which optimization strategy is this?

   • AScaling
   • BRefactoring
   • CCaching
   • DCompression
   Reveal Solution Discussion Select an answer first