Amazon AWS Certified Cloud Practitioner CLF-C02 Practice Test 42
Question 410
A stakeholder is considering Variable costs because a retailer wants lower cloud expenses during months with fewer transactions. What is the MOST relevant capability or benefit?
- Evaluate use of qualifying existing software licenses subject to vendor and AWS terms
- Let eligible costs rise and fall with actual resource consumption
- Classify cloud usage-based service payments as operating spending
- Reduce repetitive administrative work through consistent automation
Explanation
Correct Answer
B:Let eligible costs rise and fall with actual resource consumption. Variable cost follows utilization or usage rather than remaining fixed at a pre-purchased capacity level. The stated need is specifically a retailer wants lower cloud expenses during months with fewer transactions.
Incorrect Answers
A:This outcome fits Bring Your Own License: BYOL may reduce duplicate license purchases when specific licensing rules and deployment requirements are satisfied. The stakeholder requires the more specific capability provided by Variable costs, not that separate benefit.
C:This outcome fits Operating expenditure: Variable cloud charges generally align with operating expense rather than a customer buying provider hardware. The stakeholder requires the more specific capability provided by Variable costs, not that separate benefit.
D:This outcome fits Automation savings: Automation can reduce manual effort and mistakes while making temporary resources easier to retire. The stakeholder requires the more specific capability provided by Variable costs, not that separate benefit.
Question 411
A stakeholder is considering Amazon Lex because a company wants a conversational bot that interprets user requests in a customer service channel. What is the MOST relevant capability or benefit?
- Support interactive SQL analysis over data in S3
- Support managed big-data processing frameworks
- Support building conversational interfaces
- Support data integration, ETL and catalog features
Explanation
Correct Answer
C:Use Amazon Lex for building conversational interfaces. Lex provides conversational AI for chatbots and voice-enabled applications. The stated need is specifically a company wants a conversational bot that interprets user requests in a customer service channel.
Incorrect Answers
A:This outcome fits Amazon Athena: Athena is a serverless interactive query service for supported data sources such as S3. The stakeholder requires the more specific capability provided by Amazon Lex, not that separate benefit.
B:This outcome fits Amazon EMR: EMR runs supported distributed analytics frameworks and is not a relational transaction service. The stakeholder requires the more specific capability provided by Amazon Lex, not that separate benefit.
D:This outcome fits AWS Glue: Glue supports preparing and cataloging data; it is not the primary object storage service. The stakeholder requires the more specific capability provided by Amazon Lex, not that separate benefit.
Question 412
Multiple Linux EC2 instances require a shared elastic file system supporting common file semantics. Which AWS service or cloud concept is the MOST direct match for this need?
- Amazon S3
- Amazon EBS
- S3 Intelligent-Tiering
- Amazon EFS
Explanation
Correct Answer
D:Amazon EFS fits the need because eFS is a managed elastic network file system for supported Linux workloads, unlike S3 object API storage. The relevant capability or responsibility is: Use Amazon Elastic File System for managed shared file storage.
Incorrect Answers
A:Amazon S3 object storage is associated with a different use case: a business stores images and documents as objects accessed using service APIs. S3 stores data as objects in buckets; it is not an attachable EC2 block device or shared POSIX file system. The question instead focuses on multiple Linux EC2 instances require a shared elastic file system supporting common file semantics; Amazon EFS is the more direct match.
B:Amazon EBS block volumes is associated with a different use case: a database server on EC2 needs persistent block storage beyond the life of one specific host. EBS provides network-attached block volumes with persistence and snapshot capabilities subject to volume type and configuration. The question instead focuses on multiple Linux EC2 instances require a shared elastic file system supporting common file semantics; Amazon EFS is the more direct match.
C:S3 Intelligent-Tiering is associated with a different use case: an organization cannot accurately predict which stored objects will be accessed often next month. Intelligent-Tiering moves eligible objects among access tiers based on usage, with monitoring and other class terms. The question instead focuses on multiple Linux EC2 instances require a shared elastic file system supporting common file semantics; Amazon EFS is the more direct match.
Question 413
Within the Cloud Technology and Services domain, which business example MOST clearly illustrates Amazon Aurora, rather than a different AWS concept?
- A growing business wants a cloud-optimized managed relational engine compatible with MySQL or PostgreSQL
- A fraud team needs to query relationships and connections among entities
- A game needs low-latency access to large volumes of key-value player state without managing servers
- A web application needs a managed relational database that supports SQL queries and transactions
Explanation
Correct Answer
A:The decisive requirement is: Consider Amazon Aurora for a managed relational database compatible with supported engines. This is the role of Amazon Aurora. Aurora is an AWS-managed relational database designed for cloud operation and compatible with selected open-source SQL engines.
Incorrect Answers
B:This describes a scenario for Amazon Neptune: use Amazon Neptune for graph-oriented data relationships. Neptune supports graph data models for workloads centered on relationships among connected entities. It is not the most direct example of Amazon Aurora.
C:This describes a scenario for Amazon DynamoDB: use Amazon DynamoDB as a managed NoSQL database. DynamoDB supports key-value and document data models and is not a general-purpose relational SQL database. It is not the most direct example of Amazon Aurora.
D:This describes a scenario for Amazon RDS relational database: use Amazon Relational Database Service for supported relational engines. RDS manages selected database infrastructure work for relational workloads, while users still control database schema and access. It is not the most direct example of Amazon Aurora.
Question 414
A stakeholder is considering Rapid experimentation because a product group wants to run several short-lived proofs of concept at low initial commitment. What is the MOST relevant capability or benefit?
- Protect stored objects against underlying component failures
- Launch and remove temporary testing resources without permanent equipment purchases
- Maintain operation despite certain component failures
- Experiment and deliver changes rapidly using on-demand resources
Explanation
Correct Answer
B:Launch and remove temporary testing resources without permanent equipment purchases. On-demand cloud environments make experiments easier to start and stop as new ideas are evaluated. The stated need is specifically a product group wants to run several short-lived proofs of concept at low initial commitment.
Incorrect Answers
A:This outcome fits Storage durability: Durability describes the likelihood that stored data remains intact; it is different from immediate service accessibility. The stakeholder requires the more specific capability provided by Rapid experimentation, not that separate benefit.
C:This outcome fits Fault tolerance: Fault tolerance keeps service functioning when failures happen, often through replicated or redundant components. The stakeholder requires the more specific capability provided by Rapid experimentation, not that separate benefit.
D:This outcome fits Agility: Cloud agility helps teams provision resources quickly and test business ideas without waiting for lengthy hardware procurement. The stakeholder requires the more specific capability provided by Rapid experimentation, not that separate benefit.
Question 415
A stakeholder is considering AWS Lambda because an online form should run short application code only when events occur without managing servers. What is the MOST relevant capability or benefit?
- Support AWS-hosted Kubernetes orchestration
- Support configurable virtual compute instances
- Support event-driven serverless function execution
- Distribute inbound traffic among healthy application targets
Explanation
Correct Answer
C:Use AWS Lambda for event-driven serverless function execution. Lambda executes event-triggered code without the customer managing underlying servers, subject to service limits. The stated need is specifically an online form should run short application code only when events occur without managing servers.
Incorrect Answers
A:This outcome fits Amazon EKS: EKS offers managed Kubernetes control-plane capabilities for applications using Kubernetes APIs. The stakeholder requires the more specific capability provided by AWS Lambda, not that separate benefit.
B:This outcome fits Amazon EC2 virtual servers: EC2 offers virtual servers with selectable instance types and customer-managed guest operating systems. The stakeholder requires the more specific capability provided by AWS Lambda, not that separate benefit.
D:This outcome fits Elastic Load Balancing: Elastic Load Balancing routes requests or connections to available targets rather than relying on one application instance. The stakeholder requires the more specific capability provided by AWS Lambda, not that separate benefit.
Question 416
Within the Cloud Concepts domain, which business example MOST clearly illustrates Rapid experimentation, rather than a different AWS concept?
- A payment-processing workload must continue processing transactions when an individual component unexpectedly fails
- A photo service needs stored customer pictures to remain intact despite individual storage hardware failures
- A research portal expects sustained growth from thousands to millions of visitors over several years
- A product group wants to run several short-lived proofs of concept at low initial commitment
Explanation
Correct Answer
D:The decisive requirement is: Launch and remove temporary testing resources without permanent equipment purchases. This is the role of Rapid experimentation. On-demand cloud environments make experiments easier to start and stop as new ideas are evaluated.
Incorrect Answers
A:This describes a scenario for Fault tolerance: maintain operation despite certain component failures. Fault tolerance keeps service functioning when failures happen, often through replicated or redundant components. It is not the most direct example of Rapid experimentation.
B:This describes a scenario for Storage durability: protect stored objects against underlying component failures. Durability describes the likelihood that stored data remains intact; it is different from immediate service accessibility. It is not the most direct example of Rapid experimentation.
C:This describes a scenario for Scalability: increase a system's capacity to handle a larger ongoing workload. Scalability is the ability to handle greater load by adding resources or increasing their capacity as an organization grows. It is not the most direct example of Rapid experimentation.
Question 417
A stakeholder is considering Operational Excellence pillar because a team wants to improve routine operations through measurement, incident learning, and repeatable processes. What is the MOST relevant capability or benefit?
- Continuously improve operations and operational procedures
- Use automation for routine, repeatable operational actions
- Represent infrastructure configuration declaratively and apply repeatable changes
- Use computing resources efficiently as requirements change
Explanation
Correct Answer
A:Continuously improve operations and operational procedures. The Operational Excellence pillar focuses on running and monitoring workloads effectively and improving operational processes. The stated need is specifically a team wants to improve routine operations through measurement, incident learning, and repeatable processes.
Incorrect Answers
B:This outcome fits Automated operational response: Automating repeatable operations reduces manual error and supports dependable responses while human review remains appropriate for sensitive changes. The stakeholder requires the more specific capability provided by Operational Excellence pillar, not that separate benefit.
C:This outcome fits Infrastructure changes as code: Infrastructure as code reduces manual drift and supports consistent, reviewable infrastructure provisioning. The stakeholder requires the more specific capability provided by Operational Excellence pillar, not that separate benefit.
D:This outcome fits Performance Efficiency pillar: The Performance Efficiency pillar focuses on choosing and adapting resources to match workload performance needs. The stakeholder requires the more specific capability provided by Operational Excellence pillar, not that separate benefit.
Question 418
A project manager compares AWS Config with other AWS concepts while considering this need: an organization must inspect how an AWS resource configuration changed over time. Which pairing assigns the responsibilities or benefits correctly?
- AWS Config: access dedicated managed hardware security modules; AWS CloudHSM: track configuration changes and evaluate resource compliance over time
- AWS Config: track configuration changes and evaluate resource compliance over time; AWS CloudHSM: access dedicated managed hardware security modules
- AWS Config: organize control evidence collection; AWS Audit Manager: track configuration changes and evaluate resource compliance over time
- AWS Config: evaluate Region and service data-location capabilities against applicable residency requirements; Data residency considerations: track configuration changes and evaluate resource compliance over time
Explanation
Correct Answer
B:The first pairing identifies AWS Config with its actual role: record configuration changes and evaluate resource compliance with AWS Config. AWS Config tracks supported resource configuration history and rules rather than serving as a generic application log service. The comparison is valid because AWS CloudHSM hardware keys instead addresses use AWS CloudHSM to access dedicated managed hardware security modules.
Incorrect Answers
A:The roles are swapped. AWS CloudHSM is associated with use AWS CloudHSM to access dedicated managed hardware security modules; AWS Config instead has the role: Record configuration changes and evaluate resource compliance with AWS Config. AWS Config tracks supported resource configuration history and rules rather than serving as a generic application log service.
C:The roles are swapped. AWS Audit Manager is associated with use AWS Audit Manager to organize control evidence collection; AWS Config instead has the role: Record configuration changes and evaluate resource compliance with AWS Config. AWS Config tracks supported resource configuration history and rules rather than serving as a generic application log service.
D:The roles are swapped. Data residency considerations is associated with evaluate Region and service data-location capabilities against applicable residency requirements; AWS Config instead has the role: Record configuration changes and evaluate resource compliance with AWS Config. AWS Config tracks supported resource configuration history and rules rather than serving as a generic application log service.
Question 419
A legacy automation application uses an AWS access-key ID and secret key for API access. Which AWS service or cloud concept is the MOST direct match for this need?
- AWS IAM Identity Center
- AWS STS
- Access keys
- Identity federation
Explanation
Correct Answer
C:Access keys fits the need because aWS access keys enable programmatic authentication and must not be committed to public repositories. The relevant capability or responsibility is: Treat access keys as sensitive credentials and rotate or replace them where appropriate.
Incorrect Answers
A:AWS IAM Identity Center is associated with a different use case: employees need centralized workforce access to multiple AWS accounts using corporate identities. IAM Identity Center connects workforce identities and assigns access across AWS accounts and compatible applications. The question instead focuses on a legacy automation application uses an AWS access-key ID and secret key for API access; Access keys is the more direct match.
B:AWS STS role assumption is associated with a different use case: an application needs temporary AWS credentials after assuming an authorized IAM role. STS provides temporary credentials for permitted role or federated sessions; it does not issue physical security tokens. The question instead focuses on a legacy automation application uses an AWS access-key ID and secret key for API access; Access keys is the more direct match.
D:Identity federation is associated with a different use case: a company wants staff to authenticate to AWS using its existing corporate identity provider. Federation integrates identity-provider authentication with AWS access, supporting centralized workforce identity management. The question instead focuses on a legacy automation application uses an AWS access-key ID and secret key for API access; Access keys is the more direct match.
Question 420
An analytics node needs high local disk throughput for temporary data processing. Which AWS service or cloud concept is the MOST direct match for this need?
- Amazon Lightsail
- Elastic Load Balancing
- Amazon EC2
- Storage-optimized EC2
Explanation
Correct Answer
D:Storage-optimized EC2 fits the need because storage-optimized instance families are designed for high local storage I/O and throughput needs. The relevant capability or responsibility is: Choose an EC2 storage-optimized instance family where local storage performance is central.
Incorrect Answers
A:Amazon Lightsail is associated with a different use case: a small business wants a straightforward virtual private server with bundled resources. Lightsail offers simple virtual server and related resource plans for common small applications and websites. The question instead focuses on an analytics node needs high local disk throughput for temporary data processing; Storage-optimized EC2 is the more direct match.
B:Elastic Load Balancing is associated with a different use case: a website needs inbound requests distributed among several healthy application targets. Elastic Load Balancing routes requests or connections to available targets rather than relying on one application instance. The question instead focuses on an analytics node needs high local disk throughput for temporary data processing; Storage-optimized EC2 is the more direct match.
C:Amazon EC2 virtual servers is associated with a different use case: a software vendor needs full control of a virtual machine operating system for a legacy application. EC2 offers virtual servers with selectable instance types and customer-managed guest operating systems. The question instead focuses on an analytics node needs high local disk throughput for temporary data processing; Storage-optimized EC2 is the more direct match.