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Certified Solutions Architect EC2 Instance Types and Cost 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.

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  1. A company wants to run SAP HANA on EC2. Which instance family is AWS-certified for SAP HANA in-memory workloads?

    Answer: X1 high-memory instances

    X1 and X1e instances are AWS-certified for SAP HANA due to their extremely high memory capacity (up to 3,904 GB).

  2. Which purchasing option should an architect choose for a third-party software that requires a license tied to a specific physical server's socket count?

    Answer: Dedicated Hosts

    Dedicated Hosts expose physical socket and core details needed for BYOL (Bring Your Own License) software tied to specific hardware.

  3. A Spot Instance running a stateful application receives a termination notice. The architect wants to persist the instance state for potential restart. Which Spot Instance interruption behavior should be configured?

    Answer: Hibernate

    Hibernate saves the in-memory state to EBS so the instance can resume from exactly where it left off when capacity becomes available again.

  4. An EC2 T3 instance is running in 'unlimited' mode and has exhausted its CPU credit balance. What is the cost implication?

    Answer: Additional CPU usage is charged at a per-vCPU-hour rate above the baseline

    In unlimited mode, CPU usage beyond credits is billed at $0.05 per vCPU-hour for Linux, allowing sustained performance at an extra cost.

  5. An architect needs NVMe SSD instance storage with the highest IOPS for a NoSQL database cache tier. Which instance family is most appropriate?

    Answer: I3 storage-optimized instances

    I3 instances provide NVMe SSD instance storage with millions of IOPS, purpose-built for high-performance, I/O-intensive NoSQL databases.

  6. A Reserved Instance purchased in us-east-1 for an m5.2xlarge — what is the benefit of an AZ-scoped (Zonal) RI over a Regional RI?

    Answer: Zonal RIs reserve capacity in a specific AZ guaranteeing instance launch

    Zonal Reserved Instances provide a capacity reservation in the specified AZ, ensuring you can always launch that instance type during capacity-constrained events.

  7. Which EC2 instance type is best suited for a graphics-intensive workload such as 3D rendering and virtual desktop infrastructure (VDI)?

    Answer: G4dn instances

    G4dn instances use NVIDIA T4 GPUs optimized for graphics rendering and machine learning inference, making them ideal for VDI and 3D workloads.