PCNE Configuring Network Services Practice Question
A cloud engineer is configuring a Global External HTTPS Load Balancer with a backend service that targets a Cloud Run service via a serverless NEG. They want to enable Cloud CDN and set cache behavior to cache all responses regardless of origin headers. Which THREE steps are required? (Choose three.)
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
✓
Configure a cache key policy that includes the query string
To force cache all, you set cache mode to FORCE_CACHE_ALL. You also need to enable Cloud CDN on the backend service and set the appropriate cache key policy. Signed URL key is not required for basic caching. The URL map is not modified for caching.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure a cache key policy that includes the query string
Why this is correct
Often needed to ensure proper caching per request, though not always required; but recommended.
- ✗
Generate a signed URL key
Why it's wrong here
Only needed for private content, not required for basic caching.
- ✓
Set the cache mode to FORCE_CACHE_ALL on the backend service
Why this is correct
Forces caching of all responses.
- ✗
Create a backend bucket instead of a backend service
Why it's wrong here
Backend bucket is for Cloud Storage; for Cloud Run, you use backend service.
- ✓
Enable Cloud CDN on the backend service
Why this is correct
Required to activate CDN.
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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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCNE 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 PCNE exam.