Salesforce DEX-450 Exam - Topic 12 Question 115 Discussion

Actual exam question for Salesforce's DEX-450 exam

Question #: 115
Topic #: 12

A company's engineering department is conducting a month-long test on the scalability of an in-house-developed software that requires a cluster of 100 or more servers. Which of the following models is the best to use?

APaaS

BSaaS

CBaaS

DlaaS

Show Suggested Answer

Suggested Answer: D

Infrastructure as a Service (IaaS) is the best model for the scenario described because it provides on-demand access to compute, storage, and networking resources that are ideal for a scalable server cluster. IaaS allows the engineering team to rent infrastructure resources without having to invest in physical hardware, making it perfect for temporary or fluctuating workloads, such as scalability testing.

Key Characteristics of IaaS:

Full control over the operating systems and applications running on the servers.

Flexible resource allocation to support high scalability.

Ideal for custom software testing where specific server configurations may be needed.

Why not the other options?

PaaS (Platform as a Service): While PaaS is excellent for application development and deployment, it abstracts the infrastructure layer, which would limit the engineering team's control over the cluster's configuration.

SaaS (Software as a Service): SaaS delivers fully managed applications, not infrastructure or testing environments. It's irrelevant for this use case.

BaaS (Backend as a Service): BaaS is tailored to mobile or web application backend development, providing APIs and pre-built services, not infrastructure for a server cluster.

Platform Developer Reference: While this question is broader than Salesforce-specific concepts, understanding IaaS vs. PaaS is relevant when working with Salesforce development. For example:

Salesforce operates as a PaaS (e.g., Force.com platform), allowing developers to build and deploy applications without managing underlying servers.

Testing scalability and performance at an infrastructure level (as in the question) would fall under IaaS concepts, which Salesforce developers might encounter when integrating external services or infrastructure like AWS, Azure, or Google Cloud.

This foundational knowledge complements your understanding of cloud services in the Salesforce ecosystem.

by Carla at Jul 06, 2025, 10:54 PM

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Jeanice

2 months ago

Wait, why not just use SaaS? Seems easier.

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Shoshana

2 months ago

IaaS is the way to go, no doubt!

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Jamie

3 months ago

I thought BaaS was for backups, not this.

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Luisa

3 months ago

Definitely IaaS for scalability!

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Jerry

3 months ago

PaaS could work too, but IaaS is better.

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Elli

3 months ago

IaaS seems like the best fit since it allows for scalability and management of the underlying infrastructure, but I could be wrong.

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Jina

3 months ago

I’m a bit confused; I thought SaaS was for software delivery, but does it really apply to a situation needing a cluster of servers?

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Annice

4 months ago

I practiced a similar question where I had to choose between IaaS and PaaS, and I think IaaS might be the right choice here since it provides more control over the servers.

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Sheridan

4 months ago

I think I remember that PaaS is more about platforms for development, but I'm not sure if it scales well for a large cluster like this.

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Mozell

4 months ago

The key here is that we need a scalable solution for the software test. Based on that, I'd say IaaS is the best option to provide the necessary infrastructure on demand.

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Mollie

4 months ago

I remember learning about these cloud models in class, but I'm drawing a blank right now. I'll have to review my notes to refresh my memory.

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Aaron

4 months ago

Okay, let's see. We're looking for the best model for a scalable software test on a 100+ server cluster. I'm thinking PaaS might be the way to go, but I'll double-check the definitions.

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Willard

5 months ago

Hmm, I'm not entirely sure about the differences between these cloud models. I'll need to think it through carefully.

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Yun

5 months ago

This seems like a straightforward question about cloud computing models. I'm pretty confident I can figure this out.

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Kattie

7 months ago

PaaS, because who needs to worry about servers when you can just 'platform' your way to success?

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Wilda

5 months ago

A: I think PaaS is the best option for this test.

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Malcom

7 months ago

IaaS is the way to go, just like renting a fleet of monster trucks for your demolition derby.

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Francisca

6 months ago

IaaS is definitely the best choice for this kind of test.

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Ricki

7 months ago

Because BaaS provides backend services that can easily scale with the number of servers needed for the test.

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Andree

7 months ago

SaaS? Are you kidding me? I don't think the software company wants to hand over their entire application to someone else's service.

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Edwin

7 months ago

BaaS? Seriously? This is a scalability test, not a backend-as-a-service party!

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Brett

6 months ago

D) IaaS

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Angella

7 months ago

A) PaaS

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Farrah

7 months ago

Why do you think BaaS is better, Ricki?

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Ricki

8 months ago

I disagree, I think C) BaaS would be better for scalability testing.

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Effie

8 months ago

PaaS might be a good option, let the platform handle the scaling and focus on the application.

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Giuseppe

7 months ago

A: Let's go with PaaS then, it will make our job easier.

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Leontine

7 months ago

B: Yeah, PaaS can handle the scaling for us.

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Sarah

7 months ago

A: I think PaaS would be the best option for scalability.

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Glen

8 months ago

I agree with Farrah, IaaS would be the most suitable for this test.

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Carmen

8 months ago

IaaS for sure! You need the full control over the infrastructure to handle a large-scale test like this.

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Madalyn

7 months ago

Definitely, with IaaS you can easily scale up to 100 servers for the test.

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Allene

7 months ago

I agree, IaaS would be the best choice for this kind of test.

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Shantell

8 months ago

IaaS for sure! You need the full control over the infrastructure to handle a large-scale test like this.

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Farrah

8 months ago

I think the best model to use is D) IaaS.

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