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AWS Solutions Architect (SAA-C03)

Storage & databases

23 free practice questions with explanations

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PassNova has 23 free AWS Solutions Architect (SAA-C03) practice questions on Storage & databases, each with a clear explanation. Practise them in the browser with instant feedback — 100% free, no sign-up, on any device. Updated for 2026.

Sample questions

Storage & databases: example questions & answers

Here are 6 example questions from this topic. Practise the full set of 23 free in the browser.

  1. A company requires a fully managed NoSQL database that delivers single-digit millisecond performance at any scale with no server management. Which service should they choose?

    • A Amazon RDS
    • B Amazon DynamoDB ✓
    • C Amazon Redshift
    • D Amazon Aurora

    Answer: Amazon DynamoDB is a fully managed, serverless NoSQL database providing single-digit millisecond latency at virtually any scale without infrastructure management.

  2. A company needs shared file storage that can be mounted concurrently by hundreds of Linux EC2 instances across multiple Availability Zones. Which service is appropriate?

    • A Amazon EBS
    • B Amazon EFS ✓
    • C Amazon S3
    • D Instance store

    Answer: Amazon EFS provides a fully managed, elastic NFS file system that can be mounted by many EC2 instances across multiple AZs simultaneously, unlike EBS which attaches to one instance per AZ.

  3. An EC2 instance hosting a transactional database requires block storage with low latency and consistent high IOPS. Which EBS volume type is BEST suited?

    • A General Purpose SSD (gp2)
    • B Provisioned IOPS SSD (io1/io2) ✓
    • C Throughput Optimized HDD (st1)
    • D Cold HDD (sc1)

    Answer: Provisioned IOPS SSD volumes deliver consistent, high IOPS and low latency, designed for I/O-intensive transactional database workloads that need guaranteed performance.

  4. A solutions architect needs a database that automatically scales storage and provides MySQL and PostgreSQL compatibility with high performance and durability. Which service is BEST?

    • A Amazon DynamoDB
    • B Amazon Aurora ✓
    • C Amazon ElastiCache
    • D Amazon Redshift

    Answer: Amazon Aurora is a MySQL- and PostgreSQL-compatible managed relational database with automatic storage scaling, high throughput, and storage replicated across multiple AZs.

  5. A company needs object storage with eleven nines of durability for storing application data. Which AWS service provides this?

    • A Amazon EBS
    • B Amazon S3 ✓
    • C Instance store
    • D Amazon EFS

    Answer: Amazon S3 is designed for 99.999999999% (eleven nines) durability by redundantly storing objects across multiple devices and facilities, suitable for durable object storage.

  6. An application running on EC2 needs sub-millisecond block storage that does not need to persist after instance termination, for temporary scratch data. Which option is MOST cost-effective?

    • A Provisioned IOPS SSD EBS
    • B EC2 instance store ✓
    • C Amazon EFS
    • D Amazon S3

    Answer: EC2 instance store provides high-speed, ephemeral block storage physically attached to the host, ideal and cost-effective for temporary data that does not need to persist.

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