Which design principle aligns with performance efficiency pillar of the AWS Well-Architected Framework?
A. Using serverless architectures
B. Scaling horizontally
C. Measuring the cost of workloads
D. Using managed services
Show Answer
Correct Answer: A
Explanation: The Performance Efficiency pillar's cloud design principles include using serverless architectures, democratizing advanced technologies, going global in minutes, experimenting more often, and considering mechanical sympathy. 'Scale horizontally' is a design principle associated with the Reliability pillar, while 'measure the cost of workloads' belongs to Cost Optimization. 'Using managed services' is beneficial across multiple pillars but is not the specific design principle asked here.
Question 223
Which option is AWS responsible for under the AWS shared responsibility model?
A. Network and firewall configuration
B. Client-side data encryption
C. Management of user permissions
D. Hardware and infrastructure
Show Answer
Correct Answer: D
Explanation: Under the AWS shared responsibility model, AWS is responsible for the security 'of' the cloud, including the physical hardware, networking, data centers, and underlying infrastructure. Customers are responsible for security 'in' the cloud, such as managing user permissions, client-side encryption, and configuring network/firewall settings within their cloud resources.
Question 224
A company wants to gain insights from its data and build interactive data visualization dashboards.
Which AWS service will meet these requirements?
A. Amazon SageMaker
B. Amazon Rekognition
C. Amazon QuickSight
D. Amazon Kinesis
Show Answer
Correct Answer: C
Explanation: Amazon QuickSight is AWS's business intelligence service for analyzing data and creating interactive dashboards and visualizations. SageMaker is for building and deploying machine learning models, Rekognition is for image and video analysis, and Kinesis is for real-time data streaming.
Question 225
A company wants its Amazon EC2 instances to be in different locations but share the same geographic area. The company also wants to use multiple power grids and independent networking connectivity for the EC2 instances.
Which solution meets these requirements?
A. Use EC2 instances in multiple edge locations in the same AWS Region.
B. Use EC2 instances in multiple Availability Zones in the same AWS Region.
C. Use EC2 instances in multiple Amazon Connect locations in the same AWS Region.
D. Use EC2 instances in multiple AWS Artifact locations in the same AWS Region.
Show Answer
Correct Answer: B
Explanation: Availability Zones within the same AWS Region are physically separate locations that share the same geographic area while providing independent power, cooling, and networking. Deploying EC2 instances across multiple Availability Zones improves fault tolerance and meets the requirement for separate locations with independent infrastructure.
Question 226
An ecommerce company has deployed a new web application on Amazon EC2 instances. The company wants to distribute incoming HTTP traffic evenly across all running instances.
Which AWS service or resource will meet this requirement?
A. Amazon EC2 Auto Scaling
B. Application Load Balancer
C. Gateway Load Balancer
D. Network Load Balancer
Show Answer
Correct Answer: B
Explanation: An Application Load Balancer (ALB) is designed to distribute HTTP and HTTPS (Layer 7) traffic across multiple EC2 instances. EC2 Auto Scaling manages instance count rather than distributing traffic. Gateway Load Balancer is for deploying and scaling virtual network appliances. Network Load Balancer operates at Layer 4 (TCP/UDP/TLS) and is not the standard choice when the requirement specifically calls for distributing HTTP web application traffic.
Question 227
A company wants to migrate a company’s on-premises container infrastructure to the AWS Cloud. The company wants to prevent unplanned administration and operation cost and adapt to a serverless architecture.
Which AWS service will meet these requirements?
A. Amazon Connect
B. AWS Fargate
C. Amazon Lightsail
D. Amazon EC2
Show Answer
Correct Answer: B
Explanation: AWS Fargate is a serverless compute engine for containers that eliminates the need to provision and manage servers. It helps reduce operational overhead and unplanned administration costs while supporting containerized workloads on Amazon ECS or Amazon EKS. Amazon Connect is a contact center service, Lightsail is a simplified VM service, and EC2 requires server management.
Question 228
Which AWS service or feature gives users the ability to provision AWS infrastructure programmatically?
A. AWS Cloud Development Kit (AWS CDK)
B. Amazon CodeGuru
C. AWS Config
D. AWS CodeCommit
Show Answer
Correct Answer: A
Explanation: AWS Cloud Development Kit (AWS CDK) lets developers define and provision AWS infrastructure programmatically using familiar programming languages. It synthesizes infrastructure definitions into AWS CloudFormation templates for deployment. Amazon CodeGuru is for code reviews and profiling, AWS Config assesses resource configuration and compliance, and AWS CodeCommit is a source control service.
Question 229
A company migrated to the AWS Cloud. Now the company pays for services on an as-needed basis.
Which advantage of cloud computing is the company benefiting from?
A. Stop spending money running and maintaining data centers
B. Increase speed and agility
C. Go global in minutes
D. Trade fixed expense for variable expense
Show Answer
Correct Answer: D
Explanation: Paying for services on an as-needed basis means the company is using a consumption-based pricing model, replacing upfront capital expenditures with pay-as-you-go operational costs. This is the cloud advantage of trading fixed expense for variable expense.
Question 230
A company wants to use automated video analysis to identify employees that are accessing its offices.
Which AWS service will meet this requirement?
A. Amazon Rekognition
B. Amazon Polly
C. Amazon Cognito
D. AWS Lambda
Show Answer
Correct Answer: A
Explanation: Amazon Rekognition is AWS's image and video analysis service. It provides facial detection, face comparison, and face recognition capabilities that can identify people accessing an office from video feeds. Amazon Polly is text-to-speech, Amazon Cognito handles user identity and authentication for applications, and AWS Lambda is serverless compute rather than a video analysis service.
Question 231
A company needs a threat detection service that will continuously monitor its AWS accounts, workloads, and Amazon S3 buckets for malicious activity and unauthorized behavior.
Which AWS service meets these requirements?
A. AWS Shield
B. AWS Firewall Manager
C. Amazon GuardDuty
D. Amazon Inspector
Show Answer
Correct Answer: C
Explanation: Amazon GuardDuty is a managed threat detection service that continuously monitors AWS accounts, workloads, and Amazon S3 buckets for malicious activity and unauthorized behavior using AWS, network, and threat intelligence data. AWS Shield protects against DDoS attacks, AWS Firewall Manager centrally manages firewall policies, and Amazon Inspector assesses vulnerabilities rather than providing continuous threat detection.
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