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 (MGN) is the service designed to migrate servers, including Amazon EC2 instances, between AWS Regions. AWS DMS is for databases, AWS DataSync transfers file/object data, and AWS Migration Hub provides migration tracking rather than performing server migrations.
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: AWS Lambda is the most cost-effective choice for workloads that run for short durations and are invoked only a few times per day. Lambda is serverless, requires no infrastructure management, and charges only for execution time and requests. ECS, EKS, and EC2 typically require continuously running compute resources or cluster management, making them less cost-effective for this infrequent, short-lived application.
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 is designed to collect information about on-premises servers, application dependencies, configuration, and utilization to help assess and plan a migration. It does not migrate or replicate workloads. AWS Application Migration Service performs replication and migration, Cloud Migration Factory orchestrates migrations, and AWS Transfer Family is for managed file transfer protocols.
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: For a workload that runs continuously 24/7, will use the same EC2 instance family and instance type for the next 12 months, a Standard Reserved Instance provides the highest discount among reservation options because the capacity requirements are fixed. Choosing the All Upfront payment option maximizes the discount compared with Partial Upfront or No Upfront. Convertible Reserved Instances trade flexibility for lower discounts, Compute Savings Plans provide flexibility but typically are not the absolute lowest cost when the instance attributes are fixed, and Spot Instances are not suitable for uninterruptible workloads.
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: On-Demand Instances are most cost-effective for short-term, unpredictable, or temporary workloads without long-term commitments. A one-month QA environment fits this model. Compute-intensive video transcoding that can be restarted is a classic Spot Instances use case, while steady one-year and three-year workloads are generally more cost-effective with Savings Plans or Reserved Instances.
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: Rehost (also called 'lift and shift') migrates an existing application to AWS without changing the application or its architecture. Replatform involves some optimizations, refactor requires code changes, and repurchase replaces the application with a different product.
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 dedicated hardware security modules (HSMs) that allow customers to generate, store, and manage cryptographic keys in the cloud. AWS Certificate Manager manages SSL/TLS certificates, AWS License Manager manages software licenses, and AWS Directory Service provides managed directory services.
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' refers to AWS's responsibility for protecting the infrastructure that runs all AWS services, including hardware, software, networking, and facilities. Customers are responsible for 'security in the cloud,' such as IAM password policies and configuring their own 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: Amazon DynamoDB is a fully managed NoSQL database designed to store and query non-relational data with high durability and scalability. Amazon RDS and Amazon Aurora are relational databases, while Amazon QuickSight is a business intelligence and visualization service.
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: With AWS Lambda, AWS manages the underlying infrastructure, operating system, and managed language runtime. The customer is responsible for the function's business logic and configuring IAM roles and permissions so the Lambda service can execute and access other AWS resources.
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