Exam CAS-004 topic 1 question 111 discussion

All answers are correct and should be done, but it looks like the questions is asking for an answer that is specific to the DevOps role. The most important security responsibility for the DevOps team in this scenario would be to securely configure the authentication mechanisms. Patching the infrastructure at the operating system level, executing port scanning against the services, and upgrading the service as part of life-cycle management are all important security responsibilities, but they are not as critical as securely configuring the authentication mechanisms in this context.

in PaaS, end user manages Data, Applications ONLY. whilst provider of PaaS platform manage Middleware, Runtime, "O/S", Virtualization, Storage, Servers, Network

This is a PaaS scenario so DevOps team certainly doesn't care about patching OS

In the scenario, the DevOps team has deployed databases, event-driven services, and an API gateway as a PaaS solution that will support a new billing system. This wording suggests that the DevOps team is building and providing the PaaS platform themselves, rather than consuming a PaaS offering from an external cloud service provider. They are responsible for the security of the entire platform, including the infrastructure and operating systems. Patching the infrastructure at the operating system level is a critical security responsibility to protect the platform from vulnerabilities.

In a PaaS environment, the DevOps team is responsible for configuring and managing the security aspects of the applications and services they deploy. This includes setting up and securing authentication mechanisms to ensure that only authorized users can access the services.

Again, this is AWS shit at its finest. You don't patch AWS Lambda/API Gateway/DynamoDB, they do. You do however need to make sure your code's auth functions are correct though.

Source: Verifying each answer against Chat GPT, my experience, other test banks, a written book, and weighing in the discussion from all users to create a 100% accurate guide for myself before I take the exam. (It isn't easy because of the time needed, but it is doing my diligence)

OS is IaaS

A. Securely configure the authentication mechanisms since it is a crucial security responsibility that DevOps teams need to perform to prevent unauthorized access to the billing system.

Service Provider manages OS

A. Patching is performed by the Sys admins, so wouldn't go with B

It can't be B; Patching the infrastructure at the OS is done by the CSP in the PaaS model.

I think if anything it's A. I see people vote B but that's usually taken cared by sys admins.

I would recommend "A. Securely configure the authentication mechanisms." Properly configuring the authentication mechanisms is critical for ensuring that only authorized users can access the billing system. If the authentication mechanisms are not properly configured, it could lead to security vulnerabilities and potentially allow unauthorized users to access the system. In contrast, the other options, while important for maintaining the security of the billing system, are not as crucial for ensuring that the system is only accessible to authorized users.

I agree. I'm also leaning towards A. DevOps team's number one responsibility is to ensure all the services/systems they deploy is configured securely before they can worry about patching. In this case A.

It makes the most sense. That or D. B more sounds like something an infrastructure team would do.

B is the answer, I am responsible for patch installation as a DevOps