AWS 201-250

A company is storing data that will not be frequently accessed in the AWS Cloud. If the company needs to access the data, the data needs to be retrieved within 12 hours. The company wants a solution that is cost-effective for storage costs for each gigabyte. Which Amazon S3 storage class will meet these requirements?

• S3 Standard

• S3 Glacier Flexible Retrieval

• S3 One Zone-Infrequent Access (S3 One Zone-IA)

• S3 Standard-Infrequent Access (S3 Standard-IA)

Answer explanation

Amazon S3 Glacier Flexible Retrieval (formerly Amazon S3 Glacier):

• Expedited (1 to 5 minutes)

• Standard (3 to 5 hours)

• Bulk (5 to 12 hours) – free.

Which AWS service or resource can be used to identify services that have been used by a user within a specified date range?

• Amazon S3 access control lists (ACLs)

• AWS Certificate Manager (ACM)

• Network Access Analyzer

• AWS Identity and Access Management Access Analyzer

A company needs to engage third-party consultants to help maintain and support its AWS environment and the company’s business needs. Which AWS service or resource will meet these requirements?

• AWS Support

• AWS Organizations

• AWS Service Catalog

• AWS Partner Network (APN)

A company wants to create Amazon QuickSight dashboards every week by using its billing data. Which AWS feature or tool can the company use to meet these requirements?

• AWS Budgets

• AWS Cost Explorer

• AWS Cost and Usage Report

• AWS Cost Anomaly Detection

A company is planning to move data backups to the AWS Cloud. The company needs to replace on-premises storage with storage that is cloud-based but locally cached. Which AWS service meets these requirements?

• AWS Storage Gateway

• AWS Snowcone

• AWS Backup

• Amazon Elastic File System (Amazon EFS)

Answer explanation

AWS Storage Gateway is a service that connects an on-premises software appliance with cloud-based storage to provide seamless and secure integration between an organization's on-premises IT environment and AWS's storage infrastructure. It allows the company to store data backups in the cloud while caching a copy locally for low-latency access.
There are different options of Storage Gateway, but two types that could be used for this use case are:
File Gateway (NFS) - allows to store and retrieve files as objects in Amazon S3 and access them through a file interface.
Volume Gateway (iSCSI) - allows to create storage volumes and mount them as iSCSI devices from on-premises application and access them as locally attached disks. Both options provide a cloud-based storage that is locally cached, which meets the company's requirement.

A company needs to organize its resources and track AWS costs on a detailed level. The company needs to categorize costs by business department, environment, and application. Which solution will meet these requirements?

• Access the AWS Cost Management console to organize resources, set an AWS budget, and receive notifications of unintentional usage.

• Use tags to organize the resources. Activate cost allocation tags to track AWS costs on a detailed level.

• Create Amazon CloudWatch dashboards to visually organize and track costs individually.

• Access the AWS Billing and Cost Management dashboard to organize and track resource consumption on a detailed level.

Answer explanation

• Tags: Tags are key-value pairs that can be applied to AWS resources. By tagging resources with keys such as Department, Environment, and Application, the company can categorize and organize resources effectively.

• Cost Allocation Tags: When cost allocation tags are activated in the AWS Billing and Cost Management console, they allow tracking costs based on those tags. This enables detailed cost breakdowns by the specified categories.

A company needs to plan, schedule, and run hundreds of thousands of computing jobs on AWS. Which AWS service can the company use to meet this requirement?

• AWS Step Functions

• AWS Service Catalog

• Amazon Simple Queue Service (Amazon SQS)

• AWS Batch

Answer explanation

• Fully managed batch processing at any scale

• Efficiently run 100,000s of computing batch jobs on AWS

• A “batch” job is a job with a start and an end (opposed to continuous)

• Batch will dynamically launch EC2 instances or Spot Instances

• AWS Batch provisions the right amount of compute /
memory.

Which AWS services or features provide high availability and low latency by enabling failover across different AWS Regions? (Choose two.)

• Amazon Route 53

• Network Load Balancer

• Amazon S3 Transfer Acceleration

• AWS Global Accelerator

• Application Load Balancer

Answer explanation

• Amazon Route 53:

  • Description: Amazon Route 53 is a highly available and scalable Domain Name System (DNS) web service. It enables global failover by routing user traffic to resources in different AWS Regions based on routing policies, such as latency-based, failover, or geolocation routing.

  • Use Case: Ensures users are directed to the nearest or healthiest region for low latency and high availability.

• AWS Global Accelerator:

  • Description: AWS Global Accelerator improves availability and performance for global applications by routing traffic to optimal endpoints in different AWS Regions. It uses the AWS global network for low-latency and reliable failover.

  • Use Case: Provides failover across regions while ensuring minimal latency by leveraging a global static IP address.

Which of the following is a way to use Amazon EC2 Auto Scaling groups to scale capacity in the AWS Cloud?

• Scale the number of EC2 instances in or out automatically, based on demand.

• Use serverless EC2 instances.

• Scale the size of EC2 instances up or down automatically, based on demand.

• Transfer unused CPU resources between EC2 instances.

Answer explanation

• Amazon EC2 Auto Scaling groups are designed to automatically adjust the number of EC2 instances in response to changes in demand. This process is known as "scaling in" (removing instances) or "scaling out" (adding instances).

• Purpose: This ensures the application maintains availability while optimizing costs by matching the number of instances to the workload.

Which abilities are benefits of the AWS Cloud? (Choose two.)

• Trade variable expenses for capital expenses.

• Deploy globally in minutes.

• Plan capacity in advance of deployments.

• Take advantage of economies of scale.

• Reduce dependencies on network connectivity.