Question

A company wants to run a NoSQL Database on Amazon EC2 instances.

Which task is the responsibility of AWS in this scenario?

A. Update the guest operating system of the EC2 instances.
B. Maintain high availability at the database layer.
C. Patch the physical infrastructure that hosts the EC2 instances.
D. Configure the security group firewall.

Answer

C. Patch the physical infrastructure that hosts the EC2 instances.

Explanation 1

The task that is the responsibility of AWS in the scenario of running a NoSQL database on Amazon EC2 instances is option C: Patch the physical infrastructure that hosts the EC2 instances.

Here’s a detailed explanation of why option C is the correct choice:

Option C: Patch the physical infrastructure that hosts the EC2 instances.

• AWS is responsible for maintaining and patching the physical infrastructure that hosts the EC2 instances.
• This includes ensuring that the underlying hardware, network infrastructure, and data centers are updated and secure.
• AWS takes care of the physical security, power, cooling, and maintenance of the infrastructure.

Option A: Update the guest operating system of the EC2 instances.

• The responsibility of updating the guest operating system of the EC2 instances lies with the customer or the company.
• AWS provides the infrastructure and virtualization layer, but the customer is responsible for managing the operating system and applying updates.

Option B: Maintain high availability at the database layer.

• Achieving and maintaining high availability at the database layer is a shared responsibility between AWS and the customer.
• AWS provides services and features that help in building highly available architectures, such as Auto Scaling, Elastic Load Balancing, and Multi-AZ deployments.
• However, the customer needs to design and configure their NoSQL database application to take advantage of these features and ensure high availability.

Option D: Configure the security group firewall.

• The responsibility of configuring the security group firewall lies with the customer or the company.
• AWS provides security groups as a built-in feature for EC2 instances, and customers are responsible for defining and managing the inbound and outbound rules to control network traffic.

In summary, option C, patching the physical infrastructure that hosts the EC2 instances, is the task that is the responsibility of AWS. AWS takes care of maintaining and patching the underlying physical infrastructure, while tasks such as updating the guest operating system, maintaining high availability at the database layer, and configuring the security group firewall are the responsibilities of the customer or the company.

Explanation 2

I would answer this question as follows:

The correct option is C. Patch the physical infrastructure that hosts the EC2 instances. This is because AWS is responsible for the security and maintenance of the underlying hardware and network that support the EC2 service. This is part of the shared responsibility model, where AWS manages the security of the cloud, while the customer manages the security in the cloud.

Option A is incorrect because updating the guest operating system of the EC2 instances is the responsibility of the customer, not AWS. The customer has full control over the operating system and applications that run on their EC2 instances, and they need to ensure they are up to date and secure.

Option B is incorrect because maintaining high availability at the database layer is also the responsibility of the customer, not AWS. The customer needs to design and implement a scalable and fault-tolerant architecture for their database, such as using multiple EC2 instances across different availability zones, or using a managed service like Amazon DynamoDB.

Option D is incorrect because configuring the security group firewall is also the responsibility of the customer, not AWS. The customer needs to define and apply the appropriate rules for inbound and outbound traffic to their EC2 instances, based on their security requirements and best practices.

Explanation 3

The correct answer is C. Patch the physical infrastructure that hosts the EC2 instances.

Amazon EC2 is a service that provides scalable and secure compute capacity in the cloud. You can launch virtual servers, called instances, that run your applications and databases. You can choose from different types of instances that vary in performance, memory, storage, and network capacity. You can also customize your instances with different operating systems, software, and configurations.

When you run a NoSQL database on Amazon EC2 instances, you are responsible for managing the database layer and the guest operating system of the instances. This means that you need to perform tasks such as:

• Update the guest operating system of the EC2 instances. This is option A, which is incorrect. You need to keep your operating system up to date with the latest security patches and bug fixes. You can use AWS Systems Manager or other tools to automate this process.
• Maintain high availability at the database layer. This is option B, which is incorrect. You need to ensure that your database can handle failures and recover quickly. You can use Amazon EBS or Amazon S3 for data persistence and backup. You can also use Amazon EC2 Auto Scaling or Amazon EC2 Spot Instances for scaling and cost optimization.
• Configure the security group firewall. This is option D, which is incorrect. You need to protect your instances from unauthorized access and attacks. You can use security groups to control the inbound and outbound traffic to your instances. You can also use AWS WAF or AWS Shield for web application firewall and DDoS protection.

AWS is responsible for managing the physical infrastructure that hosts the EC2 instances. This means that AWS performs tasks such as:

• Patch the physical infrastructure that hosts the EC2 instances. This is option C, which is correct. AWS ensures that the hardware and firmware of the servers, routers, switches, and other devices are updated and secure. AWS also handles the power, cooling, networking, and security of the data centers.
• Provide fault tolerance and redundancy at the infrastructure layer. AWS ensures that the EC2 instances are distributed across multiple Availability Zones within a Region. Availability Zones are isolated locations that have independent power, cooling, and network connectivity. This reduces the impact of failures and increases availability.
• Monitor and maintain the performance and health of the infrastructure layer. AWS monitors the metrics and events of the infrastructure layer and takes corrective actions when necessary. AWS also provides tools such as Amazon CloudWatch or AWS Trusted Advisor for you to monitor and optimize your resources.

Therefore, the only task that can only be performed by AWS in this scenario is patching the physical infrastructure that hosts the EC2 instances.

Explanation 4

The correct answer is C. Patch the physical infrastructure that hosts the EC2 instances. Here is why:

• Amazon EC2 is a web service that provides resizable compute capacity in the cloud. It allows the company to run a NoSQL database on EC2 instances, which are virtual servers that can be launched and terminated on demand. In this scenario, the company is responsible for managing the database software, the guest operating system, and the security group firewall of the EC2 instances. AWS is responsible for providing the physical infrastructure that hosts the EC2 instances, such as servers, storage, and networking. AWS also ensures that the physical infrastructure is patched and updated to prevent any security vulnerabilities or performance issues. Therefore, option C is correct.
• Updating the guest operating system of the EC2 instances is the responsibility of the company, not AWS. The company can use AWS Systems Manager or other tools to automate the process of updating the operating system and applications on the EC2 instances. Therefore, option A is incorrect.
• Maintaining high availability at the database layer is the responsibility of the company, not AWS. The company can use Amazon EC2 Auto Scaling or other tools to scale up or down the number of EC2 instances based on demand and ensure that there is always enough capacity to handle the database workload. The company can also use Amazon EBS or other tools to provide persistent and durable storage for the database data. Therefore, option B is incorrect.
• Configuring the security group firewall is the responsibility of the company, not AWS. A security group is a virtual firewall that controls the inbound and outbound traffic for one or more EC2 instances. The company can use AWS Management Console or other tools to create and modify security group rules that allow or deny specific types of traffic to or from the EC2 instances. Therefore, option D is incorrect.

Explanation 5

The correct answer is C. Patch the physical infrastructure that hosts the EC2 instances. This task is part of the AWS responsibility for the security of the cloud, which means that AWS is responsible for protecting the infrastructure that runs all of the services in the AWS cloud, such as hardware, software, networking, and facilities. AWS regularly patches and updates the physical infrastructure that hosts the EC2 instances to ensure its security and reliability.

The other options are incorrect because:

• A. Update the guest operating system of the EC2 instances. This task is part of the customer responsibility for the security in the cloud, which means that the customer is responsible for securing and managing the resources that they create and use in AWS, such as operating systems, applications, data, and network configurations. The customer has full control over the guest operating system of the EC2 instances and can update it as needed.
• B. Maintain high availability at the database layer. This task is also part of the customer responsibility for the security in the cloud, as it involves designing and implementing a resilient architecture that can handle failures and recover from them. The customer can use various AWS services and features to achieve high availability at the database layer, such as Amazon Elastic Load Balancing, Amazon CloudFront, Amazon Route 53, Amazon S3, Amazon EBS, and Amazon RDS.
• D. Configure the security group firewall. This task is also part of the customer responsibility for the security in the cloud, as it involves setting up and managing the network access rules that control the inbound and outbound traffic to and from the EC2 instances. The customer can use security groups to act as virtual firewalls that filter traffic based on port, protocol, and source or destination.

Explanation 6

The correct answer is C. Patch the physical infrastructure that hosts the EC2 instances.

This is because AWS is responsible for the physical security and maintenance of the underlying hardware and network infrastructure that supports the EC2 instances. This includes patching the physical servers, routers, switches, power supplies, cooling systems, and other components that are essential for the EC2 service to operate. AWS also provides fault tolerance and redundancy at the physical layer by distributing the EC2 instances across multiple Availability Zones.

The other options are incorrect because they are not the responsibility of AWS in this scenario:

• Option A is incorrect because AWS does not update the guest operating system of the EC2 instances. The guest operating system is the software that runs on top of the virtual machine (VM) and provides the interface for the applications and users. The customer is responsible for installing, configuring, updating, and securing the guest operating system of their EC2 instances.
• Option B is incorrect because AWS does not maintain high availability at the database layer. The database layer is the software that manages the data storage and retrieval for the applications. The customer is responsible for choosing, installing, configuring, scaling, backing up, and securing the database software on their EC2 instances. AWS does provide some managed database services, such as Amazon DynamoDB and Amazon RDS, that can handle some of these tasks for the customer, but they are not part of the EC2 service.
• Option D is incorrect because AWS does not configure the security group firewall. The security group firewall is a virtual firewall that controls the inbound and outbound network traffic for the EC2 instances. The customer is responsible for creating, modifying, and applying the security group rules to their EC2 instances according to their security requirements. AWS does provide some tools and best practices to help the customer secure their EC2 instances, such as Amazon VPC, AWS Identity and Access Management (IAM), and AWS Security Hub, but they are not part of the EC2 service.

I hope this answer helps you understand the question better.

Explanation 7

The task that is the responsibility of AWS in this scenario is to patch the physical infrastructure that hosts the EC2 instances (Option C).

In this scenario, the company is using Amazon EC2 instances to run a NoSQL database. EC2 instances are virtual machines hosted on AWS’s physical infrastructure in their data centers.

While the company is responsible for tasks related to their EC2 instances and database, such as updating the guest OS (Option A), maintaining high availability at the database layer (Option B), and configuring security groups (Option D), AWS is responsible for patching and maintaining the underlying physical hardware.

AWS owns and manages the physical servers, networking equipment, storage devices and other infrastructure that hosts the EC2 instances. Ensuring this infrastructure is kept up-to-date and secure through patching and maintenance falls under AWS’s purview (Option C).

Therefore, of the given options, the task that is AWS’s responsibility in this scenario of running a NoSQL database on EC2 instances is to patch the physical infrastructure hosting the virtual machines. The company manages resources and software at the instance and database layers, while AWS handles the physical hosting environment.

Explanation 8

C. Patch the physical infrastructure that hosts the EC2 instances.

In the shared responsibility model of AWS, AWS is responsible for the security ‘of’ the cloud, which includes the infrastructure that runs all of the services offered in the AWS Cloud. This infrastructure is composed of the hardware, software, networking, and facilities that run AWS Cloud services. Therefore, patching the physical infrastructure that hosts the EC2 instances is the responsibility of AWS. Tasks like updating the guest OS, maintaining high availability at the database layer, and configuring the security group firewall are the responsibility of the customer.

Explanation 9

The correct answer is: C. Patch the physical infrastructure that hosts the EC2 instances.

AWS is responsible for patching the physical infrastructure that hosts the EC2 instances. This includes the hardware, firmware, and software that make up the physical infrastructure. AWS also provides a number of tools and services that can help customers manage the security of their EC2 instances, such as security groups and network access control lists.

Option A is incorrect because AWS is not responsible for updating the guest operating system of the EC2 instances. This is the responsibility of the customer.

Option B is incorrect because AWS is not responsible for maintaining high availability at the database layer. This is the responsibility of the customer.

Option D is incorrect because AWS is not responsible for configuring the security group firewall. This is the responsibility of the customer.

Explanation 10

Here is a comprehensive response to the question:

The company is responsible for managing the guest operating systems of their EC2 instances and maintaining high availability at the database layer. AWS is responsible for patching and maintaining the physical infrastructure that hosts the EC2 instances (option C).

While AWS provides the EC2 instances as a service, the underlying hardware, hosts, operating systems and database software/configuration would need to be managed by the company. AWS is responsible for ensuring the availability of the compute and storage resources but not for availability or configuration of applications running on them.

Specifically for networking, AWS would be responsible for configuring and maintaining the security group firewall (option D). Security groups act as a virtual firewall that controls incoming and outgoing traffic to EC2 instances. The company can specify rules for allowing/denying traffic in their security groups, but AWS is responsible for implementing those rules in the underlying infrastructure.

In summary, when running a NoSQL database on EC2, the company manages the guest OS, database software and high availability configuration. AWS is responsible for maintaining the physical hosts and implementing network security rules defined in the account’s security groups. The correct answer is option C.

Explanation 11

Here is a detailed response:

The correct answer is C. When a company runs a NoSQL database on EC2 instances, AWS is responsible for patching the physical infrastructure that hosts the EC2 instances.

AWS manages the hardware, host operating system, virtualization layer and physical security of the underlying infrastructure hosting the EC2 instances. This includes regularly patching the physical servers, networking devices, storage devices etc. to apply security updates and fix software bugs (option C).

The other options are responsibilities of the customer:

A) Updating the guest operating system of the EC2 instances is the customer’s responsibility. They decide what OS to install and are responsible for patching it.

B) Maintaining high availability at the database layer, such as configuring replication, failover etc. is the customer’s responsibility. AWS only provides the virtual hosting platform.

D) Configuring the security group firewall rules that control network access to EC2 instances is the customer’s responsibility. They define the rules, while AWS only enforces them at the virtual networking layer.

In summary, when a NoSQL database is run on AWS EC2 instances, AWS is responsible for option C – patching the physical infrastructure, while other database deployment and management tasks fall under the customer’s purview.

Explanation 12

In the scenario where a company wants to run a NoSQL database on Amazon EC2 instances, the responsibility of AWS can be determined as follows:

A. Updating the guest operating system of the EC2 instances: This task is the responsibility of the company or the user. When using Amazon EC2 instances, the user has full control over the operating system and is responsible for managing updates and patches.

B. Maintaining high availability at the database layer: This task is also the responsibility of the company or the user. While Amazon EC2 provides the infrastructure to run the instances, ensuring high availability at the database layer requires additional configuration and management by the user. This may involve implementing replication, clustering, or other techniques to ensure data availability and durability.

C. Patching the physical infrastructure that hosts the EC2 instances: This task is the responsibility of AWS. Amazon Web Services manages the underlying physical infrastructure, including servers, networking, and storage, to ensure it is secure and up to date. AWS is responsible for applying patches and updates to the physical infrastructure to maintain its reliability and security.

D. Configuring the security group firewall: This task is the responsibility of the company or the user. Amazon EC2 provides a feature called security groups, which act as virtual firewalls controlling inbound and outbound traffic for EC2 instances. The user is responsible for configuring the security groups to allow appropriate network access to the NoSQL database running on the EC2 instances.

Therefore, in this scenario, the responsibility of AWS would be option C: Patch the physical infrastructure that hosts the EC2 instances. AWS manages and maintains the physical infrastructure, ensuring that it is patched and up to date. The other tasks mentioned (updating the operating system, maintaining high availability at the database layer, and configuring the security group firewall) fall under the responsibility of the company or the user.

Explanation 13

In the scenario where a company wants to run a NoSQL database on Amazon EC2 instances, the responsibility of AWS varies depending on the specific task. Let’s go through each option to determine which task AWS is responsible for:

A. Update the guest operating system of the EC2 instances:
Amazon Web Services (AWS) is not responsible for updating the guest operating system of the EC2 instances. As the user or administrator, it is your responsibility to manage and update the operating system running on the EC2 instances. AWS provides the infrastructure and platform for running the instances but does not manage the operating system-level updates.

B. Maintain high availability at the database layer:
Maintaining high availability at the database layer is the responsibility of the company or the database administrator. AWS provides various services and features that can help achieve high availability, such as Amazon RDS (Relational Database Service) or Amazon DynamoDB, which are managed database services. However, when running a NoSQL database on EC2 instances, the responsibility for ensuring high availability lies with the company or the administrators.

C. Patch the physical infrastructure that hosts the EC2 instances:
AWS takes care of patching and maintaining the physical infrastructure, including the underlying EC2 host systems. As a user or administrator, you do not have direct control over the physical infrastructure. AWS manages the patching and maintenance of the host systems to ensure the security, reliability, and performance of the infrastructure.

D. Configure the security group firewall:
Configuring the security group firewall is the responsibility of the user or administrator. AWS provides the security group feature that acts as a virtual firewall for EC2 instances. It allows you to define inbound and outbound traffic rules to control network access to your instances. You are responsible for configuring the security groups based on your specific requirements and security policies.

In summary, in the scenario of running a NoSQL database on Amazon EC2 instances:

• AWS is responsible for patching and maintaining the physical infrastructure.
• The responsibility for updating the guest operating system, maintaining high availability at the database layer, and configuring the security group firewall lies with the company or the administrators.

Explanation 14

I can confidently answer the following question:

The task that is the responsibility of AWS in the scenario where a company wants to run a NoSQL database on Amazon EC2 instances is:

D. Configure the security group firewall.

Explanation:

When a company wants to run a NoSQL database on Amazon EC2 instances, AWS provides the necessary infrastructure and security features to ensure the safety and security of the database. One of the key security features is the security group firewall, which is used to control inbound and outbound traffic to the database instances.

AWS is responsible for configuring the security group firewall to allow only authorized traffic to reach the database instances, including traffic from the application servers that will be accessing the database. This involves setting up security groups with the appropriate inbound rules to allow traffic on the ports used by the NoSQL database, such as port 2181 for Amazon DynamoDB and port 2182 for Amazon DocumentDB.

Option A, updating the guest operating system of the EC2 instances, is not a task that AWS would typically perform. AWS provides pre-configured and optimized images for various operating systems, including Amazon Linux and Windows, which are designed to be used as-is for various workloads. However, the company may choose to perform updates and patches on their own, or they may request AWS to perform these tasks as part of their managed services offerings.

Option B, maintaining high availability at the database layer, is a responsibility shared between the company and AWS. Both parties must work together to ensure that the database instances are properly configured and monitored to ensure high availability. This includes configuring automated backups, setting up redundant storage and networking, and implementing load balancing and auto-scaling.

Option C, patching the physical infrastructure that hosts the EC2 instances, is not a task that AWS would typically perform. AWS provides virtualized computing resources, and it is the responsibility of the company to manage and maintain the underlying physical infrastructure, including patching and updating the hosts and networking equipment.

In summary, AWS is responsible for configuring the security group firewall to control traffic to the NoSQL database instances, while the company is responsible for maintaining high availability at the database layer and managing the physical infrastructure that hosts the EC2 instances.

Explanation 15

The correct answer is D. Configure the security group firewall.

When running a NoSQL database on Amazon EC2 instances, AWS is responsible for providing a secure and scalable infrastructure. One of the key security features that AWS provides is the security group firewall, which allows you to control inbound and outbound network traffic to and from your EC2 instances.

AWS does not provide updates to the guest operating system of the EC2 instances (Option A), as that is the responsibility of the customer. Additionally, AWS does not maintain high availability at the database layer (Option B), as that is the responsibility of the customer to ensure through appropriate database design, clustering, and replication. Finally, AWS does not patch the physical infrastructure that hosts the EC2 instances (Option C), as that is the responsibility of the customer to ensure through appropriate maintenance and upgrades.

Therefore, the correct answer is D. Configure the security group firewall. AWS is responsible for configuring and managing the security group firewall to ensure that only authorized traffic can access the EC2 instances running the NoSQL database.

Explanation 16

In the scenario where a company wants to run a NoSQL database on Amazon EC2 instances, the responsibility of AWS is option B: Maintain high availability at the database layer.

Here’s a detailed explanation:

A. Update the guest operating system of the EC2 instances:

AWS is responsible for providing the infrastructure for EC2 instances, but the responsibility for updating the guest operating system (OS) of the EC2 instances falls on the customer. AWS provides tools and services like Amazon Systems Manager (SSM) that customers can use to automate OS updates, but the actual updates and patching are typically the customer’s responsibility.

B. Maintain high availability at the database layer:

AWS provides services and features that enable high availability at the database layer, especially for NoSQL databases like Amazon DynamoDB. AWS offers managed NoSQL database services like DynamoDB and DocumentDB, which are designed to be highly available and automatically managed by AWS. Customers can use these services to ensure high availability without needing to manage the underlying infrastructure themselves.

C. Patch the physical infrastructure that hosts the EC2 instances:

Patching the physical infrastructure is entirely the responsibility of AWS, and customers do not need to be concerned with it. AWS manages the underlying physical infrastructure and ensures it is patched and maintained for security and reliability.

D. Configure the security group firewall:

Configuring the security group firewall is a shared responsibility between AWS and the customer. AWS provides the security group feature, which allows customers to define inbound and outbound traffic rules for their EC2 instances. Customers are responsible for configuring security groups to meet their specific security requirements.

In summary, when running a NoSQL database on Amazon EC2 instances, maintaining high availability at the database layer is primarily the responsibility of AWS. AWS offers managed database services that are designed for high availability, making it easier for customers to ensure their databases are resilient and available.

Explanation 17

In the scenario where a company wants to run a NoSQL database on Amazon EC2 instances, the task that is the responsibility of AWS is to maintain high availability at the database layer (Option B).

Amazon EC2 provides virtual machines on which the company can run their NoSQL database. While the company has control over the EC2 instances and the guest operating system running on them (Option A), AWS takes responsibility for ensuring high availability at the database layer.

High availability refers to the ability of a system to remain operational and accessible even in the event of failures or disruptions. AWS offers various services and features to help achieve high availability for databases, such as Amazon RDS (Relational Database Service) and Amazon DynamoDB.

With Amazon RDS, AWS manages the underlying infrastructure, including database backups, software patching, and automatic failure detection and recovery. This allows the company to focus on managing the database itself rather than worrying about the underlying infrastructure.

Similarly, Amazon DynamoDB is a fully managed NoSQL database service provided by AWS. It automatically replicates data across multiple availability zones to ensure high availability and durability.

On the other hand, tasks such as patching the physical infrastructure that hosts the EC2 instances (Option C) and configuring the security group firewall (Option D) are the responsibility of AWS. These tasks are part of the infrastructure management and security provided by AWS.

In summary, in the scenario of running a NoSQL database on Amazon EC2 instances, the responsibility of AWS is to maintain high availability at the database layer. AWS achieves this through services like Amazon RDS and Amazon DynamoDB, which handle replication, backups, and automatic failure recovery. The company is responsible for tasks like updating the guest operating system (Option A) and can configure the security group firewall (Option D) to control network access to the EC2 instances.

Explanation 18

The correct answer is D. Configure the security group firewall.

AWS is responsible for the physical infrastructure that hosts the EC2 instances, including patching the underlying operating system and hypervisor. However, the customer is responsible for configuring the security group firewall, which controls inbound and outbound network traffic to and from the EC2 instances.

The other options are the responsibility of the customer.

• Option A, updating the guest operating system of the EC2 instances, is the responsibility of the customer.
• Option B, maintaining high availability at the database layer, is the responsibility of the customer.
• Option C, patching the physical infrastructure that hosts the EC2 instances, is the responsibility of AWS.

Explanation 19

The correct answer is D. Configure the security group firewall.

AWS is responsible for the physical infrastructure that hosts the EC2 instances, including patching the underlying operating system and maintaining high availability. However, the customer is responsible for configuring the security group firewall, which controls the traffic that can reach the EC2 instances.

The other options are the responsibility of the customer.

Option A, updating the guest operating system of the EC2 instances, is the responsibility of the customer. AWS does not update the guest operating system of EC2 instances.

Option B, maintaining high availability at the database layer, is the responsibility of the customer. AWS does not provide any built-in high availability features for NoSQL databases.

Option C, patching the physical infrastructure that hosts the EC2 instances, is the responsibility of AWS. AWS regularly patches the underlying operating system of the physical infrastructure that hosts EC2 instances.

Therefore, the only task that is the responsibility of AWS in this scenario is configuring the security group firewall.

Here are some other tasks that are the responsibility of AWS:

• Providing physical infrastructure for EC2 instances
• Provisioning and managing EC2 instances
• Providing networking for EC2 instances
• Providing storage for EC2 instances
• Providing compute resources for EC2 instances

Here are some other tasks that are the responsibility of the customer:

• Configuring the security group firewall
• Installing and configuring the NoSQL database software
• Managing the data in the NoSQL database
• Backing up the data in the NoSQL database
• Monitoring the NoSQL database

Explanation 20

The correct answer is D. Configure the security group firewall.

AWS is responsible for the physical infrastructure that hosts the EC2 instances, including patching and maintaining the underlying hardware. AWS is also responsible for configuring the security group firewall, which controls the traffic that can flow into and out of the EC2 instances.

The company is responsible for updating the guest operating system of the EC2 instances and maintaining high availability at the database layer.

Here is a breakdown of the responsibilities of AWS and the company in this scenario:

AWS responsibilities:

• Patch the physical infrastructure that hosts the EC2 instances.
• Configure the security group firewall.
• Provide 24/7 monitoring and support for the EC2 instances.

Company responsibilities:

• Update the guest operating system of the EC2 instances.
• Install and configure the NoSQL database software.
• Maintain high availability at the database layer.
• Back up the database regularly.

Explanation 21

The correct answer is B. Maintain high availability at the database layer.

When running a NoSQL database on Amazon EC2 instances, the responsibility of AWS is to provide a highly available and scalable infrastructure for the database to operate on. This includes providing redundant storage, networking, and compute resources to ensure that the database remains available and responsive even in the event of hardware failures or other disruptions.

Option A, updating the guest operating system of the EC2 instances, is the responsibility of the company or the database administrator, as AWS does not have access to the guest operating system.

Option C, patching the physical infrastructure that hosts the EC2 instances, is also the responsibility of the company or the database administrator, as AWS is responsible for maintaining the physical infrastructure, but not for patching or updating the operating system.

Option D, configuring the security group firewall, is a shared responsibility between AWS and the company. AWS provides the security group feature, which allows for the configuration of firewall rules to control access to the EC2 instances. However, it is the responsibility of the company or the database administrator to configure the security group rules to meet their specific security requirements.

Therefore, the correct answer is B, Maintain high availability at the database layer, as this is a responsibility that falls squarely on AWS.

Reference

• AWS Shared Responsibility Model – Introduction to DevOps on AWS (amazon.com)
• Overview of the AWS Shared Responsibility Model | by Aveek Das | Towards Data Science
• Shared Responsibility Model – Amazon Web Services (AWS)
• The AWS Shared Responsibility Model: Everything You Need to Know – Security Boulevard
• The Shared Responsibility Model Explained w/Examples | Wiz
• Shared Responsibility Model (w3schools.com)

Amazon AWS Certified Cloud Practitioner certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the Amazon AWS Certified Cloud Practitioner exam and earn Amazon AWS Certified Cloud Practitioner certification.

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