Which AWS service can migrate Amazon EC2 instances from one AWS Region to another?
A. AWS Application Migration Service
B. AWS Database Migration Service (AWS DMS)
C. AWS DataSync
D. AWS Migration Hub
Show Answer
Correct Answer: A
Explanation: AWS Application Migration Service is specifically designed to lift and shift server-based workloads, including Amazon EC2 instances, between AWS Regions or from on-premises to AWS. It continuously replicates source servers and launches them as EC2 instances in the target Region. The other options focus on databases (AWS DMS), data transfer (DataSync), or migration tracking and orchestration (Migration Hub), not EC2 instance migration.
Question 203
A company has an on-premises application. The application has processing times of less than 5 minutes and is invoked only a few times each day. The company wants to move the application to the AWS Cloud.
Which AWS service will support this application MOST cost-effectively?
A. Amazon Elastic Container Service (Amazon ECS)
B. AWS Lambda
C. Amazon Elastic Kubernetes Service (Amazon EKS)
D. Amazon EC2
Show Answer
Correct Answer: B
Explanation: The application runs for less than 5 minutes and is invoked only a few times per day, which aligns perfectly with AWS Lambda’s serverless, event-driven model. Lambda charges only for execution time and number of invocations, with no cost for idle capacity or infrastructure management. In contrast, ECS, EKS, and EC2 involve paying for provisioned compute resources even when the application is idle, making them less cost-effective for infrequent, short-lived workloads.
Question 204
A company is planning to migrate to the AWS Cloud. The company needs to understand the existing on-premises usage and configuration. The company does not want to replicate its workloads to AWS, yet.
Which AWS service or tool will meet these requirements?
A. AWS Application Discovery Service
B. AWS Application Migration Service
C. Cloud Migration Factory
D. AWS Transfer Family
Show Answer
Correct Answer: A
Explanation: AWS Application Discovery Service collects information about on-premises servers, applications, configurations, and utilization to help assess and plan a migration. It does not require replicating or migrating workloads, which matches the requirement to understand the existing environment before moving to AWS.
Question 205
A company runs an uninterruptible Amazon EC2 workload on AWS 24 hours a day, 7 days a week. The company will require the same instance family and instance type to run the workload for the next 12 months.
Which combination of purchasing options should the company choose to MOST optimize costs? (Choose two.)
A. Standard Reserved Instance
B. Convertible Reserved Instance
C. Compute Savings Plan
D. Spot Instance
E. All Upfront payment
Show Answer
Correct Answer: A, E
Explanation: The workload runs 24/7, is uninterruptible, and will use the same instance family and type for a full year, which matches the ideal use case for a Standard Reserved Instance. Standard RIs provide the highest discount when instance attributes are fixed. Choosing the All Upfront payment option further maximizes the discount compared to partial or no upfront options. Spot Instances are unsuitable for uninterruptible workloads, and Convertible RIs or Savings Plans offer more flexibility but at a lower discount when flexibility is not needed.
Question 206
For which use case are Amazon EC2 On-Demand Instances MOST cost-effective?
A. Compute-intensive video transcoding that can be restarted if necessary
B. An instance in continual use for 1 month to conduct quality assurance tests
C. An instance that runs a web server that will run for 1 year
D. An instance that runs a database that will run for 3 years
Show Answer
Correct Answer: B
Explanation: Amazon EC2 On-Demand Instances are most cost-effective for short-term, predictable usage where there is no long-term commitment. Option B describes an instance used continuously for only 1 month, which is too short to justify Reserved Instances or Savings Plans. Option A is better suited for Spot Instances since it can be restarted. Options C and D involve long-term workloads where Reserved Instances would be more cost-effective.
Question 207
A company runs a legacy workload in an on-premises data center. The company wants to migrate the workload to AWS. The company does not want to make any changes to the workload.
Which migration strategy should the company use?
A. Repurchase
B. Replatform
C. Rehost
D. Refactor
Show Answer
Correct Answer: C
Explanation: The requirement is to migrate a legacy on‑premises workload to AWS without making any changes. Rehosting, also known as "lift and shift," moves the application as‑is to AWS with no code or architecture modifications, which directly matches the requirement.
Question 208
Which AWS service can a company use to manage encryption keys in the cloud?
A. AWS License Manager
B. AWS Certificate Manager (ACM)
C. AWS CloudHSM
D. AWS Directory Service
Show Answer
Correct Answer: C
Explanation: AWS CloudHSM provides hardware security modules in the cloud that allow organizations to generate, store, and manage their own encryption keys using dedicated, tamper‑resistant hardware. The other options do not manage encryption keys directly.
Question 209
What does "security of the cloud” refer to in the AWS shared responsibility model?
A. Availability of AWS services such as Amazon EC2
B. Security of the cloud infrastructure that runs all the AWS services
C. Implementation of password policies for IAM users
D. Security of customer environments by using AWS Network Firewall partners
Show Answer
Correct Answer: B
Explanation: In the AWS shared responsibility model, "security of the cloud" is AWS’s responsibility and refers to protecting the underlying cloud infrastructure—hardware, software, networking, and facilities—that run all AWS services. Customers are responsible for security *in* the cloud, such as IAM password policies and configuring their environments.
Question 210
A company has an application that produces unstructured data continuously. The company needs to store the data so that the data is durable and easy to query.
Which AWS service can the company use to meet these requirements?
A. Amazon RDS
B. Amazon Aurora
C. Amazon QuickSight
D. Amazon DynamoDB
Show Answer
Correct Answer: D
Explanation: The application produces unstructured data continuously and needs durable storage with the ability to query the data. Amazon DynamoDB is a fully managed, highly durable NoSQL key-value and document database that can store unstructured or semi-structured data at scale and supports fast querying. Amazon RDS and Amazon Aurora are relational databases suited for structured data, and Amazon QuickSight is a visualization service, not a data store.
Question 211
A company wants to build an application that uses AWS Lambda to run Python code.
Under the AWS shared responsibility model, which tasks will be the company’s responsibility? (Choose two.)
A. Management of the underlying infrastructure.
B. Management of the operating system.
C. Writing the business logic code.
D. Installation of the computer language runtime.
E. Providing AWS Identity and Access Management (IAM) access to the Lambda service.
Show Answer
Correct Answer: C, E
Explanation: Under the AWS shared responsibility model for AWS Lambda, AWS manages the underlying infrastructure, operating system, and language runtime. The customer is responsible for writing and maintaining the application’s business logic code and for configuring security in the cloud, including providing appropriate IAM roles and permissions that allow Lambda to access other AWS services.
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