Managing Implementation and Ensuring Solution and Operations Reliability →hardMultiple ChoiceObjective-mapped
Google PCA Practice Question: Managing Implementation and Ensuring Solution and Operations Reliability
Your company runs a production application on Compute Engine instances behind a managed instance group (MIG). You need to perform a rolling update with canary testing, gradually shifting traffic to the new version only if performance metrics are healthy. Which approach should you use?
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
✓
Use Cloud Deploy with a deployment strategy that includes a canary phase and automated verification
Cloud Deploy can be used to orchestrate canary deployments on Compute Engine. However, a more direct approach is to use a MIG with a canary configuration: you can update the MIG's instance template and use a new MIG for the canary version, then adjust the load balancer's backend weights to shift traffic gradually. Cloud Deploy supports this with deployment strategies.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Use Cloud Deploy with a deployment strategy that includes a canary phase and automated verification
Why this is correct
Cloud Deploy supports canary deployments with verification steps.
- ✗
Create a new MIG with the new template and use a Cloud Load Balancer's traffic splitting
Why it's wrong here
This is a manual method; Cloud Deploy provides automation and verification.
- ✗
Manually update each instance by SSH'ing and running a script
Why it's wrong here
Manual process is error-prone and not scalable.
- ✗
Use gcloud compute instance-groups managed rolling-action start-update with a maxSurge of 0
Why it's wrong here
This does a rolling update without canary traffic splitting.
Go deeper
Related to this question
Learn chapter
Introduction to Google Cloud Platform
Key term
Instance group
An instance group is a collection of virtual machine instances that are managed as a single unit for scaling, load balancing, and lifecycle management in cloud computing.
Key term
Managed instance group
A managed instance group is a collection of identical virtual machine instances that are automatically managed as a single unit to ensure high availability and scalability.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCA 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 PCA exam.