Google Professional Cloud Architect Exam - Topic 4 Question 115 Discussion

Actual exam question for Google's Professional Cloud Architect exam

Question #: 115
Topic #: 4

[All Professional Cloud Architect Questions]

You are implementing the infrastructure for a web service on Google Cloud. The web service needs to receive and store the data from 500,000 requests per second. The data will be queried later in real time, based on exact matches of a known set of attributes. There will be periods where the web service will not receive any requests. The business wants to keep costs low. Which web service platform and database should you use for the application?

ACloud Run and BigQuery

BCloud Run and Cloud Bigtable

CA Compute Engine autoscaling managed instance group and BigQuery

DA Compute Engine autoscaling managed instance group and Cloud Bigtable

Show Suggested Answer

Suggested Answer: B

https://cloud.google.com/run/docs/about-instance-autoscaling

https://cloud.google.com/blog/topics/developers-practitioners/bigtable-vs-bigquery-whats-difference

by Kina at Jan 05, 2026, 05:16 AM

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Brittni

3 days ago

Option A all the way! BigQuery is the perfect fit for handling all those requests and queries. Cloud Run is just the icing on the cake.

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Coletta

8 days ago

I'd go with Option D. Compute Engine autoscaling and Cloud Bigtable. Gotta love that real-time querying capability.

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Tamesha

13 days ago

Option B seems like the way to go. Cloud Run for the web service and Cloud Bigtable for the database. Keeps things scalable and cost-effective.

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Pamella

18 days ago

I’m leaning towards option B with Cloud Run and Cloud Bigtable, but I’m a bit uncertain if that combination would meet the real-time querying requirement effectively.

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Mel

24 days ago

I practiced a similar question where we had to choose between Compute Engine and Cloud Run, and I think the autoscaling feature of Compute Engine could be beneficial here.

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Lauran

29 days ago

I think Cloud Bigtable might be a good fit since it’s designed for high throughput and low latency, but I’m not completely confident about the cost implications.

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Fernanda

1 month ago

I remember that Cloud Run is great for handling variable workloads, but I'm not sure if it can handle 500,000 requests per second efficiently.

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Tijuana

1 month ago

This is a great question that really tests our understanding of Google Cloud services. I think I'll start by mapping out the key requirements and then systematically evaluate each option.

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Becky

1 month ago

I'm leaning towards option B - Cloud Run and Cloud Bigtable. The real-time querying on exact matches sounds like a good fit for Bigtable's capabilities.

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Miss

2 months ago

I'm a bit confused about the database choice. BigQuery and Cloud Bigtable both have their strengths, but I'll need to dig into the exact query requirements to decide which one is better.

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Shantell

2 months ago

Okay, let's see. 500,000 requests per second is a huge volume, so I'm thinking Cloud Run or a Compute Engine autoscaling group would be a good fit to handle that scale.

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Tiffiny

2 months ago

Hmm, this is a tough one. I'll need to carefully consider the requirements around high throughput, real-time querying, and cost-effectiveness.

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