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AWS Certified Solutions Architect study material: Compute

81 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. 44. Which two resource types does Amazon Inspector scan for software vulnerabilities? Choose two.
2. 64. Why does AWS warn against putting a password in EC2 instance user data?
3. 65. What isolation does a single AWS Fargate task receive?
4. 132. Why is embedding AWS access keys in a mobile application discouraged?
5. 174. Which two behaviours does Amazon EC2 Auto Scaling provide without any manual intervention? Choose two.
6. 175. An application process hangs but the EC2 instance still passes its system checks. What lets Auto Scaling replace it?
7. 219. Which two placement group strategies reduce the chance that one hardware failure takes several instances at once? Choose two.
8. 220. Instances are launched without any placement group. How does EC2 place them?
9. 221. Which signal warns that a Spot Instance faces a raised risk of interruption?
10. 222. How does reserved concurrency protect the resources behind a Lambda function?
11. 245. What does Amazon OpenSearch Service do when a node in a managed domain fails?
12. 260. An AMI is created from a running EC2 instance. What does it capture?
13. 261. AWS Backup records extra EC2 metadata such as instance type, VPC and IAM role. When is that metadata used?
14. 264. How does an Image Builder pipeline support a multi-Region recovery plan?
15. 268. Besides EC2 instances, which two resources can EC2 Auto Scaling adjust within a Region? Choose two.
16. 269. Which change brings a recovery Region's Auto Scaling group up to full production capacity?
17. 271. Which two values bound the size of an EC2 Auto Scaling group? Choose two.
18. 379. How do instances in an AWS Outposts subnet communicate with instances in the parent Region?
19. 380. Which connection does AWS Outposts not allow within the same VPC?
20. 391. Which resources does EC2 dedicate to a particular instance rather than sharing with others on the host?
21. 392. Two instances on the same host both want the shared disk subsystem at full rate. What happens?
22. 393. What does an EC2 instance type name encode?
23. 394. Which two hypervisors does Amazon EC2 use? Choose two.
24. 395. Which instance families still run on the Xen hypervisor rather than Nitro?
25. 396. Where does an Auto Scaling group get the configuration for the instances it launches?
26. 397. What is a Spot capacity pool?
27. 398. A persistent Spot Instance request has its instance interrupted. What does EC2 do?
28. 399. Which two things does starting a hibernated EC2 instance restore? Choose two.
29. 400. An application takes a long time to bootstrap and build up a useful memory footprint. How can hibernation help?
30. 401. Which placement group strategy puts instances on hardware with direct access to high-precision time sources?
31. 402. What is included in the dynamic data portion of EC2 instance metadata?
32. 403. Several instances are launched by one RunInstances call. How can their code tell them apart?
33. 404. How does one generic AMI serve many customers with different content?
34. 405. What is required to make an ECS task definition run on AWS Fargate?
35. 406. Which two operating systems does AWS Fargate publish platform versions for? Choose two.
36. 407. What does running ECS tasks on Fargate remove the need to decide?
37. 408. What is the default concurrency limit for Lambda across all functions in an AWS Region?
38. 409. Which two phases does Lambda use to serve a request? Choose two.
39. 410. Where does code written outside a Lambda function's main handler run?
40. 411. Can one Lambda execution environment handle two requests at the same time?
41. 412. A function averages 500 ms and receives 100 requests per second. What is its concurrency?
42. 413. A Lambda function averages 200 ms and peaks at 5,000 requests per second. What concurrency does it need?
43. 414. A critical function has no reserved concurrency and the account's pool is exhausted by other functions. What happens to it?
44. 415. Which two effects does setting reserved concurrency on a Lambda function have? Choose two.
45. 416. A function with 400 reserved concurrency hits that ceiling while the account has spare capacity elsewhere. What happens?
46. 417. Why might an account be unable to use all the Lambda concurrency it is entitled to?
47. 418. Which two ways can a Lambda function's code be packaged? Choose two.
48. 419. Which three per-function capacity settings does a Lambda owner tune?
49. 420. What are AWS Lambda MicroVMs designed for?
50. 421. How does a Lambda function get invoked?
51. 422. What does Lambda manage on the customer's behalf?
52. 423. Which two statements about Amazon ECS are correct? Choose two.
53. 424. Which three layers make up Amazon ECS?
54. 425. Under EKS standard, which part does the customer remain responsible for?
55. 426. Which two options let EKS clusters run outside the AWS cloud? Choose two.
56. 427. On which services does AWS Batch run its work?
57. 428. On which two kinds of compute can AWS Batch scale capacity? Choose two.
58. 429. How does AWS Batch help machine learning teams running SageMaker Training jobs?
59. 430. Which two things does Elastic Beanstalk provision for a deployed web application? Choose two.
60. 431. Which two languages or runtimes does Elastic Beanstalk support directly? Choose two.
61. 432. What is the deployment workflow for an application on Elastic Beanstalk?
62. 433. What is an AWS Outpost?
63. 434. What is an Outpost site?
64. 435. Which resource types does AWS Compute Optimizer generate recommendations for?
65. 436. What does an OpenSearch Service domain correspond to?
66. 437. How is an OpenSearch Service cluster resized?
67. 438. Which service runs Apache Hadoop and Apache Spark as a managed cluster platform?
68. 439. What makes AWS Glue serverless in practice?
69. 440. What is AWS Glue Studio?
70. 441. What does Fargate require an application to declare when launching a task?
71. 442. Which two tools does Amazon ECS integrate with? Choose two.
72. 443. How does Lambda handle two simultaneous invocations of the same function?
73. 444. What does an Auto Scaling scaling policy do?
74. 445. What work can be offloaded from compute targets to a load balancer?
75. 458. Why do instance types billed for high I/O performance show less variance in that performance?
76. 459. Which placement group strategy serves a tightly coupled HPC application needing low-latency node-to-node networking?
77. 460. Why do later invocations of a Lambda function often start faster than the first?
78. 461. Which Lambda control is designed specifically to reduce cold start latency?
79. 462. What benefit does self-managed S3 code storage give a Lambda function?
80. 481. Which two savings can a single Auto Scaling group combine? Choose two.
81. 496. Which two kinds of usage does a Compute Savings Plan discount? Choose two.