Unit 3: Storage and Compute Services - Practice Quiz

1 What type of storage does Amazon S3 provide?

2 What is the name of the container used to store objects in Amazon S3?

3 Which S3 storage class is designed for frequently accessed data?

4 Which S3 storage class is intended for long-term archival data with very infrequent access?

5 What does an S3 lifecycle policy automate?

6 What is the main purpose of enabling versioning on an S3 bucket?

7 Which AWS service can accelerate uploads to S3 by routing data through AWS edge locations?

8 What happens when an object is overwritten in a versioning-enabled S3 bucket?

9 What does an Amazon Machine Image (AMI) provide when launching an EC2 instance?

10 Which factor should be considered when choosing an AMI?

11 What is required to connect securely to a Linux EC2 instance using SSH?

12 Which EC2 instance family is designed to provide a balance of compute, memory, and networking resources?

13 Which EC2 instance family is most suitable for processor-intensive workloads?

14 What is EC2 user data commonly used for?

15 Which EC2 feature acts as a virtual firewall for an instance?

16 What type of storage does Amazon EBS provide for EC2 instances?

17 Which AWS storage service provides a shared file system that can be mounted by multiple EC2 instances?

18 What is an EBS snapshot?

19 Which Well-Architected Framework pillar focuses on recovering from failures and meeting demand?

20 Which practice supports cost optimization for EC2 workloads?

21 A company stores monthly reports that are accessed frequently for 30 days and then rarely accessed, but they must remain immediately available. Which S3 storage class is most appropriate after the first 30 days?

22 A workload has unpredictable object access patterns, and the team wants S3 to optimize storage costs automatically without retrieval fees. Which storage class should be selected?

23 A company stores reproducible image thumbnails that are rarely accessed. Losing the data because an Availability Zone fails is acceptable. Which storage class offers the best fit?

24 A company must upload a 200 GB file to S3 over an unreliable network. Which approach provides efficient transfer and allows failed parts to be retried independently?

25 An application generates log files that must remain immediately accessible for 90 days and then be retained at the lowest cost for seven years. Which S3 configuration best meets the requirement?

26 Versioning is enabled on an S3 bucket. A user deletes an object without specifying a version ID. What happens?

27 Users in several continents upload large files to one S3 bucket in a fixed AWS Region. Which feature can improve upload performance over long geographic distances?

28 A team must launch identical EC2 instances containing a preinstalled application and approved operating system patches. Which approach provides the most consistent launches?

29 An EC2 instance using an EBS-backed AMI is stopped and started. Which outcome should the administrator expect?

30 A company wants to launch an EC2 instance in a Region different from the Region where its custom AMI was created. What must it do first?

31 A scientific application continuously performs processor-intensive calculations while using little memory. Which EC2 instance family is the best starting choice?

32 An in-memory analytics database requires hundreds of gigabytes of RAM and moderate CPU capacity. Which EC2 instance family is most suitable?

33 A user data script installs a web server when an EC2 instance launches, but the server is not installed after a later stop and start. What is the most likely explanation?

34 An application running on EC2 must read objects from S3 without storing long-term access keys on the instance. Which configuration should be used?

35 Several Linux EC2 instances in different Availability Zones need concurrent access to the same directory of uploaded files. Which storage service is the best fit?

36 A transactional database on one EC2 instance requires low-latency block storage with provisioned performance. Which option is most appropriate?

37 An EC2 workload uses temporary scratch data that can be recreated, but it requires very high local I/O performance. Which storage option is the best fit?

38 A team wants to create a durable point-in-time backup of an EBS volume that can later be used to create another volume. What should it create?

39 A production application runs on one EC2 instance in one Availability Zone. Which change most directly improves reliability under the AWS Well-Architected Framework?

40 An application runs at 20% CPU utilization most of the month but experiences predictable traffic peaks every weekday. Which design best follows cost optimization and performance efficiency principles?

41 A data lake stores 2 PB of objects that are accessed unpredictably, but the application requires millisecond access whenever an object is requested. The organization also wants automatic cost optimization without changing object names or application logic. Which S3 storage class is the most appropriate starting point?

42 A compliance archive requires objects to remain protected from deletion or overwrite for seven years. Administrators must not be able to shorten this retention period, even if they have broad S3 permissions. Which configuration best satisfies the requirement?

43 An application uses S3 Standard-IA for backup objects that are typically retrieved once every six months. Some objects are deleted after 20 days because they are superseded. Which issue must be addressed before selecting this class?

44 A company requires a single logical namespace for objects uploaded by applications in multiple AWS Regions. It wants users to access data through one regional endpoint while automatically routing requests to the closest bucket replica. Which S3 feature is intended for this design?

45 A media company uploads 100 TB from an on-premises data center over a 1-Gbps link. The transfer must complete within 12 hours, but the link is also needed for business traffic. Which approach most directly reduces network impact while meeting the deadline?

46 An S3 bucket has versioning enabled. A lifecycle rule transitions current objects to Glacier after 30 days and expires noncurrent versions after 90 days. A client deletes an object on day 40. What happens under this rule?

47 A lifecycle rule should archive objects seven days after their last modification, but many objects receive metadata updates that change their current version. Which design best ensures archival is based on business inactivity rather than accidental version changes?

48 A versioned bucket has millions of noncurrent versions and expired delete markers. The organization wants to reduce storage cost without removing the current versions of active objects. Which lifecycle configuration is most appropriate?

49 A workload uploads objects to S3 from globally distributed clients. Upload latency is high, but the bucket must remain in one Region and the clients already have reliable Internet connectivity. Which service is the best fit for accelerating uploads?

50 A company needs to launch EC2 instances with a preinstalled application, hardened operating system settings, and approved monitoring agents. The image must be reused across accounts and Regions. Which approach provides the most repeatable result?

51 An Auto Scaling group launches instances from an AMI whose root EBS volume is encrypted with a customer managed KMS key. Instances fail to launch because the Auto Scaling service cannot use the key. Which remedy is required?

52 A security team requires that every production EC2 launch use an approved AMI and prevents direct launches from unapproved image IDs. Which control most directly enforces this requirement at the account level?

53 A batch analytics workload runs for several hours, is fault tolerant, and can be interrupted and restarted from checkpoints. Its CPU demand varies substantially throughout the month. Which purchasing and instance strategy is most cost-effective?

54 An application performs sustained vectorizable numerical computations and is CPU-bound after testing. Memory utilization remains below 35%, and network throughput is adequate. Which instance family should be evaluated first?

55 A Linux EC2 instance uses user data to install an agent. The agent is installed during the first boot, but a later stop and start does not rerun the installation. Which explanation is correct?

56 An application launched with user data intermittently starts before its database dependency is reachable. The script exits successfully but the application is unhealthy. Which improvement is most appropriate?

57 A fleet of Linux EC2 instances in multiple Availability Zones requires concurrent read-write access to the same POSIX file hierarchy. The workload has unpredictable throughput and must remain available if one Availability Zone fails. Which storage option is best suited?

58 A relational database requires low-latency block storage with predictable IOPS. The workload is write-intensive, and the team wants to provision IOPS independently from capacity. Which EBS option is most appropriate?

59 A stateless web tier needs temporary scratch space for cached thumbnails. Data can be regenerated after an instance replacement, and the workload benefits from very high local I/O with no persistence requirement. Which storage is most suitable?

60 A team stores every object permanently in S3 Standard and runs oversized EC2 instances to handle occasional monthly peaks. Which Well-Architected improvement most directly addresses cost optimization while preserving workload requirements?