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ACA Container and Serverless Services Flashcards

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

Read the first 6 ACA Container and Serverless Services flashcards as text

  1. What is the role of Alibaba Cloud ACK's Cluster Autoscaler?

    Answer: Automatically adds or removes worker nodes based on pending pod resource requests

    The Cluster Autoscaler monitors pending pods that cannot be scheduled due to insufficient resources and automatically scales the node pool up or down accordingly.

  2. In Function Compute, what is a 'cold start'?

    Answer: The latency incurred when FC initializes a new execution environment for a function that has no warm instances

    A cold start happens when FC must create a fresh execution environment (download code, initialize runtime), adding latency compared to reusing an already-warm instance.

  3. Which storage option is recommended for sharing persistent data between multiple pods in an ACK cluster within the same availability zone?

    Answer: Alibaba Cloud NAS (Network Attached Storage) mounted as a PersistentVolume

    NAS supports ReadWriteMany (RWX) access mode, allowing multiple pods to mount the same file system simultaneously, unlike block storage which is single-attach.

  4. What is the maximum default execution timeout for a single Function Compute invocation?

    Answer: 600 seconds (configurable up to 86400s for async invocations)

    Function Compute synchronous invocations default to 600 seconds maximum, and asynchronous invocations can be configured up to 86400 seconds (24 hours).

  5. Which Alibaba Cloud feature allows you to deploy an ACK application across multiple regions for disaster recovery?

    Answer: Global Traffic Manager (GTM) combined with independent ACK clusters per region

    Multi-region ACK deployments typically use Global Traffic Manager (GTM) or Alibaba Cloud DNS for traffic routing across independently deployed ACK clusters in different regions.

  6. In Alibaba Cloud Container Registry (ACR) Enterprise Edition, what feature automatically scans images for known CVEs?

    Answer: Image Vulnerability Scanning

    ACR Enterprise Edition's Image Vulnerability Scanning checks images against CVE databases and can block deployment of images exceeding a configured severity threshold.