A company is migrating to the AWS Cloud and plans to run experimental workloads for 3 to 6 months on AWS.
Which pricing model will meet these requirements?
A. Use Savings Plans for a 3-year term.
B. Use Dedicated Hosts.
C. Buy Reserved Instances.
D. Use On-Demand Instances.
Show Answer
Correct Answer: D
Explanation: On-Demand Instances are the best fit for experimental workloads lasting only 3 to 6 months because they require no long-term commitment or upfront payment. Savings Plans and Reserved Instances involve commitment periods (typically 1 or 3 years), making them unsuitable for short-term experiments. Dedicated Hosts are intended for specific licensing, compliance, or hardware isolation requirements rather than cost-effective short-term experimentation.
Question 345
Which AWS service provides the ability to host a NoSQL database in the AWS Cloud?
A. Amazon Aurora
B. Amazon DynamoDB
C. Amazon RDS
D. Amazon Redshift
Show Answer
Correct Answer: B
Explanation: Amazon DynamoDB is AWS's fully managed NoSQL database service. Amazon Aurora and Amazon RDS are managed relational database services, and Amazon Redshift is a data warehouse service.
Question 346
A company needs to move 75 petabytes of data from its on-premises data centers to AWS.
Which AWS service should the company use to meet these requirements MOST cost-effectively?
A. AWS Snowball Edge Storage Optimized
B. AWS Snowmobile
C. AWS Direct Connect
D. AWS Storage Gateway
Show Answer
Correct Answer: B
Explanation: AWS Snowmobile is designed to transfer extremely large datasets, up to exabyte scale, and is the most cost-effective option for migrating 75 PB of data. Snowball Edge devices are intended for smaller-scale transfers, AWS Direct Connect is network-based and impractical for this volume, and Storage Gateway is for hybrid storage access rather than bulk data migration.
Question 347
A company wants to integrate natural language processing (NLP) into business intelligence (BI) dashboards. The company wants to ask questions and receive answers with relevant visualizations.
Which AWS service or tool will meet these requirements?
A. Amazon Macie
B. Amazon Rekognition
C. Amazon QuickSight Q
D. Amazon Lex
Show Answer
Correct Answer: C
Explanation: Amazon QuickSight Q enables users to ask questions in natural language about their data and returns answers with automatically generated relevant visualizations within BI dashboards. Amazon Macie is for data security and sensitive data discovery, Amazon Rekognition is for image/video analysis, and Amazon Lex is for building conversational chatbots rather than BI query visualization.
Question 348
When a user wants to utilize their existing per-socket, per-core, or per-virtual machine software licenses for a Microsoft Windows server running on AWS, which Amazon EC2 instance type is required?
A. Spot Instances
B. Dedicated Instances
C. Dedicated Hosts
D. Reserved Instances
Show Answer
Correct Answer: C
Explanation: Dedicated Hosts provide physical servers dedicated to a single customer and support bring-your-own-license (BYOL) for eligible software, including Microsoft Windows Server licenses that are licensed per-socket, per-core, or per-virtual machine. Dedicated Instances, Spot Instances, and Reserved Instances do not provide the required host-level license affinity for these licensing models.
Question 349
Which of the following AWS services are serverless? (Choose two.)
A. AWS Outposts
B. Amazon EC2
C. Amazon Elastic Kubernetes Service (Amazon EKS)
D. AWS Fargate
E. AWS Lambda
Show Answer
Correct Answer: D, E
Explanation: AWS Fargate and AWS Lambda are serverless compute services. Fargate runs containers without requiring management of servers or clusters, and Lambda runs code without provisioning or managing servers. AWS Outposts provides on-premises AWS infrastructure, EC2 requires instance management, and EKS is a managed Kubernetes service but still involves cluster management (unless specifically using EKS Auto Mode/Fargate).
Question 350
Which AWS service provides a single location to track the progress of application migrations?
A. AWS Application Discovery Service
B. AWS Application Migration Service
C. AWS Service Catalog
D. AWS Migration Hub
Show Answer
Correct Answer: D
Explanation: AWS Migration Hub provides a single location to track the progress of application migrations across multiple AWS and partner migration tools. Application Discovery Service collects discovery data, Application Migration Service performs server migrations, and Service Catalog manages approved IT services.
Question 351
A company wants to allow users to authenticate and authorize multiple AWS accounts by using a single set of credentials.
Which AWS service or resource will meet this requirement?
A. AWS Organizations
B. IAM user
C. AWS IAM Identity Center (AWS Single Sign-On)
D. AWS Control Tower
Show Answer
Correct Answer: C
Explanation: AWS IAM Identity Center (formerly AWS Single Sign-On) provides centralized authentication and authorization across multiple AWS accounts using a single set of credentials. AWS Organizations manages accounts but not user authentication, IAM users are account-scoped, and AWS Control Tower helps set up and govern multi-account environments but does not provide single sign-on.
Question 352
Which mechanism allows developers to access AWS services from application code?
A. AWS Software Development Kit
B. AWS Management Console
C. AWS CodePipeline
D. AWS Config
Show Answer
Correct Answer: A
Explanation: The AWS Software Development Kit (SDK) provides language-specific libraries and APIs that allow developers to access and interact with AWS services directly from application code. The AWS Management Console is a web interface, CodePipeline is a CI/CD service, and AWS Config is a resource configuration tracking and compliance service.
Question 353
A user needs a relational database but does not have the resources to manage the hardware, resiliency, and replication.
Which AWS service option meets the user's requirements?
A. Run MySQL on Amazon Elastic Container Service (Amazon ECS).
B. Run MySQL on Amazon EC2.
C. Choose Amazon RDS for MySQL.
D. Choose Amazon ElastiCache for Redis.
Show Answer
Correct Answer: C
Explanation: Amazon RDS for MySQL is a fully managed relational database service that handles hardware provisioning, automated backups, patching, replication options, and high availability, making it the best choice for users who do not want to manage infrastructure. Running MySQL on ECS or EC2 still requires managing the database and underlying infrastructure, while ElastiCache for Redis is an in-memory cache rather than a relational database.
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