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AWS Certified Solutions Architect study material: High performance

33 questions of the 500 in the AWS Certified Solutions Architect – Associate quiz. Each opens with its answer, the reasoning and where that is written down.

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The questions

1. 87. An application in Sydney calls AWS STS and wants to reduce latency. What can it do, and what is the effect on the credentials?
2. 165. Which two advantages does an Aurora global database offer over cross-Region RDS read replicas? Choose two.
3. 330. Which two services can query data catalogued by AWS Glue straight away? Choose two.
4. 446. Which routing algorithm does an Application Load Balancer target group use by default?
5. 447. Which two claims does AWS make for S3 Express One Zone against S3 Standard? Choose two.
6. 448. An EBS volume is not delivering the IOPS it was provisioned for. What should be checked first?
7. 449. What maximum IOPS does an io2 Block Express volume reach?
8. 450. Which EBS volume family does AWS recommend for a workload that must sustain more than 16,000 IOPS?
9. 451. Which two choices shape the performance of an Amazon EFS file system? Choose two.
10. 452. Why does AWS recommend General Purpose over Max I/O performance mode for EFS?
11. 453. Which EFS throughput mode reaches the highest IOPS on a Regional file system?
12. 454. Which two workloads does AWS name as suiting FSx for Lustre? Choose two.
13. 455. What performance does FSx for Lustre deliver?
14. 456. How does S3 multipart upload raise throughput for a large object?
15. 457. Which two situations make S3 Transfer Acceleration worth its cost? Choose two.
16. 458. Why do instance types billed for high I/O performance show less variance in that performance?
17. 459. Which placement group strategy serves a tightly coupled HPC application needing low-latency node-to-node networking?
18. 460. Why do later invocations of a Lambda function often start faster than the first?
19. 461. Which Lambda control is designed specifically to reduce cold start latency?
20. 462. What benefit does self-managed S3 code storage give a Lambda function?
21. 463. How does routing a request across the AWS backbone improve CloudFront performance?
22. 464. A user requests an object that is not cached at the nearest CloudFront edge location. What happens?
23. 465. Which two statements compare Step Functions workflow throughput? Choose two.
24. 466. How does adding read replicas help a read-heavy database?
25. 467. How does connection pooling in RDS Proxy help the database?
26. 468. How many Aurora Replicas can one Aurora DB cluster carry?
27. 469. Which consistency mode does a DynamoDB global table use if none is specified?
28. 470. Which two statements about DynamoDB Accelerator are correct? Choose two.
29. 471. Which two engines does Amazon ElastiCache support? Choose two.
30. 472. What does ElastiCache Serverless remove compared with a node-based cluster?
31. 473. What does Amazon Athena let a team do with data already in S3?
32. 474. Besides SQL, what else can Amazon Athena run interactively?
33. 475. How many data source types can AWS Glue connect to?