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AWS Storage and Databases Flashcards

7 cards from real AWS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 AWS Storage and Databases flashcards as text

  1. Which DynamoDB capacity mode automatically adjusts read and write throughput based on actual traffic patterns?

    Answer: On-demand capacity mode

    DynamoDB on-demand mode automatically scales to accommodate workloads without requiring capacity planning.

  2. An EC2 instance needs high-performance block storage with consistent low latency for a database workload. Which EBS volume type is most appropriate?

    Answer: io2 Block Express

    io2 Block Express provides the highest performance EBS storage with up to 256,000 IOPS, designed for I/O-intensive database workloads.

  3. What is Amazon Aurora's storage replication factor across Availability Zones?

    Answer: 6 copies across 3 AZs

    Aurora automatically replicates data 6 ways across 3 Availability Zones to ensure durability and high availability.

  4. Which AWS service acts as a fully managed cache layer that supports both Redis and Memcached engines?

    Answer: Amazon ElastiCache

    Amazon ElastiCache is a managed in-memory caching service that supports both Redis and Memcached.

  5. A developer wants to query data stored in S3 using standard SQL without loading it into a database. Which service enables this?

    Answer: Amazon Athena

    Amazon Athena is a serverless interactive query service that allows SQL queries directly against data stored in S3.

  6. Which S3 feature allows you to automatically transition objects to cheaper storage classes based on their age?

    Answer: S3 Lifecycle policies

    S3 Lifecycle policies define rules to automatically transition objects to less expensive storage classes or expire them after a set number of days.

  7. Which AWS Database Migration Service (DMS) feature allows you to continuously replicate ongoing changes from a source database to a target database?

    Answer: Change Data Capture (CDC)

    DMS Change Data Capture (CDC) continuously captures and replicates data modifications from the source database to the target with minimal downtime.