ACA Container and Serverless Services Flashcards

In Alibaba Cloud Function Compute, what billing model is used for execution?

Answer: Pay-per-invocation based on number of requests and execution duration (GB-seconds)

Function Compute charges based on the number of function invocations and the compute time consumed (measured in GB-seconds), so you pay only when code runs.

What is a Namespace in Alibaba Cloud Container Registry (ACR) used for?

Answer: A logical grouping of container image repositories for access management and organization

An ACR Namespace organizes repositories under a common prefix and allows you to apply access control policies at the namespace level.

Which Kubernetes resource type in ACK is used to expose a deployment to external internet traffic?

Answer: LoadBalancer Service (backed by Alibaba Cloud SLB)

Creating a Kubernetes Service of type LoadBalancer in ACK automatically provisions an Alibaba Cloud SLB to route external traffic to the pods.

What is the purpose of Horizontal Pod Autoscaler (HPA) in an ACK cluster?

Answer: To scale the number of pod replicas up or down based on CPU/memory or custom metrics

HPA monitors pod-level metrics and automatically adjusts the replica count of a deployment to match current workload demand.

Which Alibaba Cloud service is commonly used with Function Compute to build RESTful APIs from serverless functions?

Answer: API Gateway

Alibaba Cloud API Gateway integrates natively with Function Compute, routing HTTP requests to functions and handling authentication, rate limiting, and monitoring.

What does the Alibaba Cloud Serverless App Engine (SAE) primarily offer compared to ECS?

Answer: A fully managed PaaS for microservices that eliminates server and cluster management

SAE provides a serverless application hosting layer where you deploy code or containers without managing servers, Kubernetes clusters, or scaling policies.