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Question 186

______ embodies the "share-nothing" architecture and essentially involves breaking a large database into several smaller databases. Common ways to split a database include
1 ) splitting tables that are not joined in the same query onto different hosts or
2 ) duplicating a table across multiple hosts and then using a hashing algorithm to determine which host receives a given update.

A.DOL operations
B.Federation
C.Fai lure recovery
D.$harding

Question 187

You have been doing a lot of testing of your VPC Network by deliberately failing EC2 instances to test whether instances are failing over properly. Your customer who will be paying the AWS bill for all this asks you if he being charged for all these instances. You try to explain to him how the billing works on EC2 instances to the best of your knowledge. What would be an appropriate response to give to the customer in regards to this?

A.Billing commences when Amazon EC2 AMI instance is completely up and billing ends as soon as the instance starts to shutdown.
B.Billing only commences only after 1 hour of uptime and billing ends when the instance terminates.
C.Billing commences when Amazon EC2 initiates the boot sequence of an AMI instance and billing ends when the instance shuts down.
D.Billing commences when Amazon EC2 initiates the boot sequence of an AMI instance and billing ends as soon as the instance starts to shutdown.

Question 188

A company hosts a data lake on Amazon S3. The data lake ingests data in Apache Parquet format from various data sources. The company uses multiple transformation steps to prepare the ingested data. The steps include filtering of anomalies, normalizing of data to standard date and time values, and generation of aggregates for analyses.
The company must store the transformed data in S3 buckets that data analysts access. The company needs a prebuilt solution for data transformation that does not require code. The solution must provide data lineage and data profiling. The company needs to share the data transformation steps with employees throughout the company.
Which solution will meet these requirements?

A.Configure an AWS Glue Studio visual canvas to transform the data. Share the transformation steps with employees by using AWS Glue jobs.
B.Configure Amazon EMR Serverless to transform the data. Share the transformation steps with employees by using EMR Serveriess jobs.
C.Configure AWS Glue DataBrew to transform the data. Share the transformation steps with employees by using DataBrew recipes.
D.Create Amazon Athena tables for the data. Write Athena SQL queries to transform the data. Share the Athena SQL queries with employees.

Question 189

A company has applications that run on Amazon EC2 instances. The EC2 instances connect to Amazon RDS databases by using an 1AM role that has associated policies. The company wants to use AWS Systems Manager to patch the EC2 instances without disrupting the running applications.
Which solution will meet these requirements?

A.Create a new 1AM role. Attach the AmazonSSMManagedlnstanceCore policy to the new 1AM role.
Attach the new 1AM role to the EC2 instances and the existing 1AM role.
B.Create an 1AM user. Attach the AmazonSSMManagedlnstanceCore policy to the 1AM user. Configure Systems Manager to use the 1AM user to manage the EC2 instances.
C.Enable Default Host Configuration Management in Systems Manager to manage the EC2 instances.
D.Remove the existing policies from the existing 1AM role. Add the AmazonSSMManagedlnstanceCore policy to the existing 1AM role.

Correct Answer: C

The most suitable solution for the company's requirements is to enable Default Host Configuration Management in Systems Manager to manage the EC2 instances. This solution will allow the company to patch the EC2 instances without disrupting the running applications and without manually creating or modifying IAM roles or users.
Default Host Configuration Management is a feature of AWS Systems Manager that enables Systems Manager to manage EC2 instances automatically as managed instances. A managed instance is an EC2 instance that is configured for use with Systems Manager. The benefits of managing instances with Systems Manager include the following:
Connect to EC2 instances securely using Session Manager.
Perform automated patch scans using Patch Manager.
View detailed information about instances using Systems Manager Inventory.
Track and manage instances using Fleet Manager.
Keep SSM Agent up to date automatically.
Default Host Configuration Management makes it possible to manage EC2 instances without having to manually create an IAM instance profile. Instead, Default Host Configuration Management creates and applies a default IAM role to ensure that Systems Manager has permissions to manage all instances in the Region and account where it is activated. If the permissions provided are not sufficient for the use case, the default IAM role can be modified or replaced with a custom role1.
The other options are not correct because they either have more operational overhead or do not meet the requirements. Creating a new IAM role, attaching the AmazonSSMManagedInstanceCore policy to the new IAM role, and attaching the new IAM role and the existing IAM role to the EC2 instances is not correct because this solution requires manual creation and management of IAM roles, which adds complexity and cost to the solution. The AmazonSSMManagedInstanceCore policy is a managed policy that grants permissions for Systems Manager core functionality2. Creating an IAM user, attaching the AmazonSSMManagedInstanceCore policy to the IAM user, and configuring Systems Manager to use the IAM user to manage the EC2 instances is not correct because this solution requires manual creation and management of IAM users, which adds complexity and cost to the solution. An IAM user is an identity within an AWS account that has specific permissions for a single person or application3. Removing the existing policies from the existing IAM role and adding the AmazonSSMManagedInstanceCore policy to the existing IAM role is not correct because this solution may disrupt the running applications that rely on the existing policies for accessing RDS databases. An IAM role is an identity within an AWS account that has specific permissions for a service or entity4.
References:
AWS managed policy: AmazonSSMManagedInstanceCore
IAM users
IAM roles
Default Host Management Configuration - AWS Systems Manager

Question 190

A company is designing a distributed application to optimize its global supply chain and manufacturing process. The company has facilities near the us east-1 Region, the eu-west-1 Region and the ap-south 1 Region.
According to the application requirements, orders that are booked in one Region must be visible in the other two Regions in 1 second or less. The database must be able to support failover with a recovery time objective (RTO) of less than 5 minutes. The application must avoid downtime so that the manufacturing process is not negatively affected Which solution meets these requirements?

A.Use Amazon DynamoDB to invoke an AWS Lambda function
B.Use an Amazon Aurora global database
C.Use Amazon RDS for PostgreSQL with a cross-Region read replica.
D.Use Amazon RDS for MySQL with a cross-Region read replica