Medium1 markMultiple Choice
Subtask 4.2: Business ProcessesFirebaseBuild vs BuyServerlessBusiness Process

GCP PCA · Question 29 · Business Processes

A startup is building a new mobile application. They need a backend to handle user authentication, store user profiles, and send push notifications. The engineering team consists of three frontend developers with no backend or infrastructure experience. The CEO wants the app launched in 2 months. Which approach should you recommend?

Answer options:

A.

Build a Node.js backend on Cloud Run, use Cloud SQL for profiles, and integrate a third-party SMS API.

B.

Deploy a Kubernetes cluster (GKE) and install open-source identity and database operators.

C.

Use Firebase Authentication, Cloud Firestore, and Firebase Cloud Messaging.

D.

Provision Compute Engine VMs and install a LAMP stack to serve as the backend.

How to approach this question

Identify the 'Build vs Buy' scenario. A team with no backend skills needs a Backend-as-a-Service (BaaS) to launch quickly.

Full Answer

C.Use Firebase Authentication, Cloud Firestore, and Firebase Cloud Messaging.✓ Correct
Use Firebase Authentication, Cloud Firestore, and Firebase Cloud Messaging.
This is a classic 'Build vs. Buy' (or managed services) business decision. Given the constraints (no backend experience, tight 2-month deadline), building custom infrastructure is the wrong choice. Firebase provides fully managed authentication, NoSQL database (Firestore), and messaging (FCM) that frontend developers can use directly, accelerating time-to-market.

Common mistakes

Choosing Cloud Run (Option A). While serverless, it still requires writing and maintaining backend code, which the team lacks the skills for.

Practice the full GCP Professional Cloud Architect Practice Exam 7

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