PCD Integrating Google Cloud services Practice Question
A developer is building a serverless application that processes user-uploaded images. The images are stored in Cloud Storage, and each upload should trigger a Cloud Function that performs image analysis and stores the result in Firestore. Which TWO Google Cloud services are essential for this integration? (Choose 2)
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
✓
Cloud Pub/Sub
Cloud Storage is the source of events (uploaded images). Cloud Pub/Sub is used to deliver notifications from Cloud Storage to the Cloud Function. Cloud Tasks, Cloud Scheduler, and Eventarc are not required for this pattern.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Cloud Pub/Sub
Why this is correct
Cloud Pub/Sub receives storage notifications and triggers the Cloud Function.
- ✓
Cloud Storage
Why this is correct
Cloud Storage stores the images and provides event notifications.
- ✗
Cloud Tasks
Why it's wrong here
Cloud Tasks is for task queuing, not needed here.
- ✗
Eventarc
Why it's wrong here
Eventarc is used for event routing, but Cloud Storage triggers can be set up directly without it.
- ✗
Cloud Scheduler
Why it's wrong here
Cloud Scheduler is for cron jobs, not event-driven triggers.
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 |
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This PCD question is part of Courseiva's 964-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCD practice question is part of Courseiva's free Google Cloud certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCD exam.