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Google Professional Cloud Architect Exam - Topic 5 Question 111 Discussion

Actual exam question for Google's Professional Cloud Architect exam
Question #: 111
Topic #: 5
[All Professional Cloud Architect Questions]

You want to automate the creation of a managed instance group and a startup script to install the OS package dependencies. You want to minimize the startup time for VMs in the instance group.

What should you do?

Show Suggested Answer Hide Answer
Suggested Answer: B

'Custom images are more deterministic and start more quickly than instances with startup scripts. However, startup scripts are more flexible and let you update the apps and settings in your instances more easily.' https://cloud.google.com/compute/docs/instance-templates/create-instance-templates#using_custom_or_public_images_in_your_instance_templates


by Lizette at Aug 13, 2025, 11:58 AM

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Nathalie
2 months ago
Wait, can you really speed up startup with a custom image?
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Lea
2 months ago
I agree, custom VM images save a lot of time.
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Trinidad
3 months ago
Not sure about that, what if the image gets outdated?
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Earlean
3 months ago
Terraform is cool, but B just makes more sense here.
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Maryann
3 months ago
B is the best option for minimizing startup time!
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Velda
3 months ago
I vaguely recall that using configuration management tools like Puppet or Ansible might add extra time during startup, but I can't remember the details.
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Linwood
4 months ago
I feel like we practiced a question similar to this where using Deployment Manager was emphasized for creating resources efficiently.
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Desire
4 months ago
I'm not entirely sure, but I think Terraform is more about infrastructure as code, so it might not be the best choice for minimizing startup time with package installations.
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Malcom
4 months ago
I remember we discussed how using a custom VM image could really speed up the startup time since all dependencies would already be included.
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Joye
4 months ago
I'm leaning towards the Terraform option. It seems like the most straightforward way to automate the whole process and ensure consistency across the instance group.
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Mari
4 months ago
I think using Deployment Manager and Ansible could be a good approach. That way, I can separate the infrastructure creation from the package installation, which might make it easier to manage and maintain.
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Lili
5 months ago
Hmm, I'm not sure which option is best here. I'll need to think through the pros and cons of each approach. Maybe I should consider creating a custom VM image to avoid the startup script overhead.
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Devora
5 months ago
This seems straightforward. I'd go with Terraform to create the managed instance group and the startup script. That way, I can manage everything in one place and minimize the startup time.
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Marguerita
5 months ago
That's a good point, but using Deployment Manager with Ansible in option D could also be effective.
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Haley
5 months ago
I disagree, I believe option B is better. Creating a custom VM image will reduce startup time.
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Marguerita
6 months ago
I think option A is the best choice. Terraform can automate the creation efficiently.
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