Unit 6: AWS Storage and Database Services - Practice Quiz

1 What type of storage does Amazon EBS provide?

2 Which AWS service commonly uses Amazon EBS volumes?

3 What type of storage is Amazon S3?

4 What is the main container used to organize objects in Amazon S3?

5 Which feature helps protect Amazon S3 data from accidental deletion or overwriting?

6 What type of storage does Amazon EFS provide?

7 What is a key characteristic of Amazon EFS?

8 What is the primary purpose of Amazon S3 Glacier?

9 Compared with frequently accessed S3 storage, Glacier storage generally has what characteristic?

10 Which storage type is usually suitable for a shared directory accessed by several servers?

11 Which storage type is commonly used for backups, images, and other unstructured files?

12 Which storage type is most closely associated with a disk volume attached to a virtual machine?

13 What does Amazon RDS primarily provide?

14 Which language is commonly used to query relational databases managed by Amazon RDS?

15 What type of database service is Amazon DynamoDB?

16 Which data model is supported by Amazon DynamoDB?

17 What is Amazon Redshift mainly designed for?

18 Which type of workload is Amazon Redshift designed to support?

19 What kind of database is Amazon Aurora?

20 Which database engines are compatible with Amazon Aurora?

21 An EC2-hosted database requires persistent block storage with consistently high IOPS and low latency. Which EBS volume type is the most appropriate?

22 A team must create a new EBS volume in another AWS Region using the data from an existing volume. What should the team do?

23 A company hosts documents in an S3 bucket and wants every uploaded object encrypted automatically without requiring uploaders to specify encryption headers. Which configuration should it use?

24 Users frequently overwrite the same configuration file in Amazon S3. The operations team must be able to recover an earlier copy after an accidental overwrite. Which feature directly supports this requirement?

25 An application generates large media files in an S3 bucket. Files older than 30 days are rarely accessed, and files older than 365 days may be deleted. Which solution requires the least operational effort?

26 Several Linux EC2 instances in different Availability Zones must concurrently access the same files through a standard file-system interface. Which service best meets this requirement?

27 An EFS file system stores project data that is actively used for one week and then accessed only a few times per year. Which feature can automatically reduce storage cost as access patterns change?

28 A company archives compliance records that are almost never retrieved. When retrieval is required, waiting up to 12 hours is acceptable, and minimizing storage cost is the priority. Which storage class is most suitable?

29 An archive stored in S3 Glacier Flexible Retrieval is needed for an urgent audit within several minutes. Which retrieval option should be requested?

30 A workload running on one EC2 instance needs a bootable, low-latency storage device that supports in-place updates to database files. Which storage technology should be selected?

31 A web application must store millions of user-uploaded images, serve them through HTTP, and scale without managing file servers. Which storage technology is the best fit?

32 A production RDS database must remain available if its primary Availability Zone fails. The application does not need to direct read traffic to the standby instance. Which configuration should be used?

33 An RDS database is handling too many read-only reporting queries, but its write workload is moderate. Which change can reduce the read load on the primary database?

34 A DynamoDB table uses CustomerId as its partition key. The application must efficiently query orders by OrderStatus, which is not part of the table's primary key. What should be added?

35 A new application has unpredictable DynamoDB traffic with occasional sharp spikes and long idle periods. The team wants to avoid capacity planning. Which capacity mode should it choose?

36 A company needs to run complex SQL aggregations across several terabytes of historical sales data for business intelligence dashboards. Which AWS service is most appropriate?

37 A Redshift table is frequently joined with a large fact table using customer_id. Which design choice can reduce data movement during these joins?

38 An Aurora cluster experiences heavy read traffic while writes remain stable. Which architecture best improves read scalability?

39 A global application uses Aurora and requires low-latency reads in several AWS Regions while keeping one primary write Region. Which feature should be used?

40 An application connects to an Aurora cluster using its cluster endpoint. After the writer instance fails, what is the main advantage of continuing to use this endpoint?

41 A latency-sensitive database runs on an EC2 instance and requires 80,000 IOPS with consistent sub-millisecond storage latency. Its I/O pattern uses 16 KiB operations. Which EBS volume type is the most appropriate?

42 An application takes nightly EBS snapshots. A 1 TiB volume contains 400 GiB of data before the first snapshot. Before the second snapshot, 25 GiB of blocks are modified and 10 GiB of files are deleted without overwriting their blocks. Approximately how much new snapshot data is stored by the second snapshot, ignoring compression and internal metadata?

43 A team creates an EBS volume from a snapshot and immediately runs a full-volume latency benchmark. Initial reads are slower than expected, although the volume type is correctly provisioned. Which action best addresses this behavior before production traffic begins?

44 A versioned S3 bucket replicates objects to another Region. An administrator deletes an object without specifying a version ID, creating a delete marker. Which statement best describes standard S3 replication behavior when delete-marker replication has not been enabled?

45 A company must prevent every principal, including the root user of its AWS account, from deleting compliance records for seven years. Records may be replaced by newer versions, but each protected version must remain immutable for its retention period. Which configuration satisfies the requirement?

46 A data pipeline uploads a 120 GiB object with S3 multipart upload but crashes before completing it. No lifecycle policy addresses incomplete uploads. Which outcome is expected?

47 Hundreds of Linux EC2 instances across multiple Availability Zones need concurrent access to one shared POSIX filesystem. The workload occasionally bursts to very high throughput and can tolerate slightly higher metadata-operation latency. Which EFS performance mode is most suitable?

48 An application mounts EFS from EC2 instances in three Availability Zones. Each instance currently connects through a mount target in a different Availability Zone, causing unnecessary cross-AZ traffic. What is the best correction?

49 An organization archives records that are almost never accessed. A rare legal request may require an object to become available in milliseconds rather than through a restore job. Which storage class is appropriate?

50 An object is restored temporarily from S3 Glacier Flexible Retrieval for five days. During that window, an S3 lifecycle rule reaches its scheduled transition date for the object. What happens?

51 A workload consists of a shared Linux home-directory tree used concurrently by EC2 instances in several Availability Zones. It requires POSIX permissions, hierarchical directories, and file locking. Which storage service best matches these requirements?

52 A single EC2-hosted transactional database requires a mountable block device, stable low latency, and crash-consistent point-in-time snapshots. The active volume does not need simultaneous cross-AZ mounting. Which service should store the database files?

53 A production RDS database uses a Multi-AZ deployment with one standby. A reporting workload must scale reads without affecting the primary. Which design correctly addresses both availability and read scaling?

54 An RDS read replica is promoted to a standalone database during a regional recovery exercise. What is the key consequence of promotion?

55 A DynamoDB table uses customerId as its partition key. One customer generates 35% of all writes, causing throttling despite ample unused capacity elsewhere. Which redesign most directly distributes this hot customer's write load?

56 An application inserts an order only if no order with the same primary key already exists. Concurrent retries must not overwrite an existing order. Which DynamoDB operation provides the required atomic guarantee?

57 A DynamoDB global table receives nearly simultaneous updates to the same item in two Regions. Neither application uses an explicit cross-Region conflict-resolution workflow. How are conflicting values normally reconciled?

58 A large Redshift table is frequently joined to a smaller dimension table on account_id, and both tables are also filtered by date ranges. Which physical design most directly reduces data redistribution during the join while supporting range-restricted scans?

59 Analysts need to join Redshift warehouse tables with several terabytes of partitioned Parquet data in S3. The external data changes often and should not be loaded into local Redshift storage before every query. Which feature is designed for this?

60 An Aurora cluster has a writer and multiple Aurora Replicas. After the writer fails, the application must reconnect without discovering a specific promoted instance. Which endpoint should the write-capable application use?