Task 3: Use Data Stores in Application Development DVA-C02 Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   Which AWS service can be used to automatically transition objects to Amazon S3 Glacier for archival based on age?

   • AAmazon S3 Lifecycle policies
   • BAWS Data Pipeline
   • CAWS Backup
   • DAmazon DynamoDB TTL
   Reveal Solution Discussion Select an answer first
2. 12application · medium

   A developer needs to retrieve all orders placed by a specific customer within the last 30 days from a DynamoDB table. The table has a composite primary key: `customer_id` (partition key) and `order_date` (sort key). The table also has a GSI on `status` for reporting purposes. The developer wants to minimize read capacity consumption. Which operation should the developer use?

   • AScan the table and filter by `customer_id` and `order_date`.
   • BQuery the GSI with `status` as the partition key and filter by `customer_id` and `order_date`.
   • CQuery the base table with `customer_id` as the partition key and `order_date` as the sort key condition (e.g., `order_date BETWEEN ...`)
   • DUse `BatchGetItem` with a list of `customer_id` and `order_date` pairs.
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   What is the purpose of serialization when storing an object in a data store?

   • ATo encrypt the object to protect sensitive data
   • BTo validate the object's data before storing it
   • CTo convert the object into a format that can be easily transmitted or stored
   • DTo compress the object to reduce storage costs
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   A company runs a DynamoDB table for a gaming application. The table stores player profiles and game state. The workload is highly variable: during game launches, write traffic spikes to 10x normal levels for a few hours, then drops back down. The company wants to avoid throttling during spikes but also wants to control costs during normal operation. What is the most appropriate capacity mode configuration?

   • AProvisioned capacity with Application Auto Scaling configured to scale based on utilization.
   • BProvisioned capacity with a high write capacity and a DynamoDB Accelerator (DAX) cluster for reads.
   • CProvisioned capacity with a fixed read and write capacity that can handle the peak load.
   • DOn-demand capacity mode.
   Reveal Solution Discussion Select an answer first
6. 15foundation · easy

   Which AWS service is designed to monitor DynamoDB table metrics such as consumed read/write capacity and throttling events?

   • AAWS CloudTrail
   • BAmazon CloudWatch
   • CAWS Config
   • DAmazon Inspector
   Reveal Solution Discussion Select an answer first