Cloud Digital Leader Google Cloud Products and Services Practice Question
A startup wants to run a Node.js web application with zero server management and automatic scaling. They expect unpredictable traffic and want to minimise costs. Which Google Cloud service should they choose?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
App Engine Standard Environment
App Engine Standard Environment is a PaaS that automatically scales, manages the runtime, and can scale to zero. App Engine Flexible runs in VMs, does not scale to zero, and costs more. Compute Engine requires manual scaling. Cloud Run is also serverless but for containers; App Engine Standard is simpler for code-based apps.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Google Kubernetes Engine (GKE)
Why it's wrong here
GKE is a managed Kubernetes service that still requires you to provision and manage a node pool. Even with autoscaling, you need at least one active node to host your Node.js application, and you are responsible for cluster upgrades, node health, and configuration. This operational overhead eliminates it from being serverless or zero-infrastructure.
- ✗
Compute Engine
Why it's wrong here
Compute Engine offers raw virtual machines where you must manually configure the OS, install runtime dependencies, and set up autoscaling policies. Even when using managed instance groups, you still define the instance template and scaling rules, and you are billed for provisioned VMs regardless of traffic. This manual management and lack of a true scale-to-zero capability makes it unsuitable for a serverless startup.
- ✓
App Engine Standard Environment
Why this is correct
App Engine Standard Environment is a serverless platform that automatically scales your Node.js application from zero instances during idle periods to many during traffic spikes. It fully manages the underlying infrastructure, including load balancing, health checks, and runtime isolation, so you only pay for the resources your app actually consumes. This aligns perfectly with the startup's need for zero server management and cost efficiency under variable traffic.
- ✗
App Engine Flexible Environment
Why it's wrong here
The App Engine Flexible Environment runs your application in a Docker container on a Compute Engine VM, giving you more customization and support for background processes. However, because it is VM-based, it requires at least one instance to remain running at all times and cannot scale to zero, resulting in an idle baseline cost. This makes it less cost-effective for or variable traffic that a startup would experience.
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
Go deeper
Related to this question
Learn chapter
Cloud Digital Transformation
Key term
Compute Engine
Compute Engine is Google Cloud's Infrastructure-as-a-Service (IaaS) offering that lets you create and run virtual machines on Google's infrastructure.
Key term
App Engine
App Engine is a fully managed serverless platform from Google Cloud that lets developers build and deploy applications without worrying about the underlying infrastructure.
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