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Compute Services Flashcards

7 cards from real CLF-C02 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Compute Services flashcards as text
  1. Which EC2 purchasing option is most suitable for an unpredictable workload that cannot be interrupted?

    Answer: On-Demand Instances

    On-Demand Instances have no long-term commitment and are never interrupted by AWS, making them ideal for unpredictable workloads.

  2. What is the key benefit of using an EC2 Dedicated Host compared to a standard EC2 instance?

    Answer: Physical server isolation for compliance and license management

    Dedicated Hosts give you a physical server solely for your use, helping meet compliance requirements and enabling per-socket or per-core software licensing.

  3. AWS Lambda charges are based on which two factors?

    Answer: Number of requests and compute duration (GB-seconds)

    Lambda pricing is based on the total number of function invocations and the duration your code runs, measured in GB-seconds of memory consumed.

  4. A company needs to ensure a minimum number of EC2 instances are always running while allowing the fleet to grow during peak demand. Which Auto Scaling setting controls the always-on minimum?

    Answer: Minimum capacity

    The minimum capacity in an Auto Scaling group defines the floor — AWS will never scale below this number of instances.

  5. Which AWS service runs managed Kubernetes clusters, abstracting away the control plane management?

    Answer: Amazon EKS

    Amazon Elastic Kubernetes Service (EKS) provides a managed Kubernetes control plane, handling upgrades, patching, and availability automatically.

  6. What distinguishes AWS Savings Plans from Reserved Instances?

    Answer: Savings Plans offer flexible commitment to a compute spend rate, applying across instance families and regions

    Savings Plans commit you to a consistent spend per hour (e.g., $10/hr) and automatically apply discounts across EC2, Lambda, and Fargate regardless of region or instance type.

  7. An application needs to process thousands of jobs simultaneously. The jobs are fault-tolerant and can restart if interrupted. Which option is most cost-effective?

    Answer: Spot Instances

    Spot Instances can be up to 90% cheaper than On-Demand and are ideal for fault-tolerant, interruptible batch workloads.