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 design principles explicitly include **using serverless architectures**, along with democratizing advanced technologies, going global in minutes, experimenting more often, and considering mechanical sympathy. Horizontal scaling is primarily listed under the Reliability pillar, not Performance Efficiency.
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, which includes the physical data centers, hardware, networking equipment, and underlying infrastructure. Customers are responsible for configuration and management tasks such as network/firewall settings, user permissions, and client-side encryption.
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: The requirement is to gain insights from data and build interactive data visualization dashboards. Amazon QuickSight is AWS’s serverless business intelligence service designed specifically for creating interactive dashboards and visual analytics. The other options focus on machine learning (SageMaker), image/video analysis (Rekognition), or real-time data streaming (Kinesis), not dashboard visualization.
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 data centers that share the same geographic area but use independent power, cooling, and networking. Deploying EC2 instances across multiple AZs meets the requirement for different locations, multiple power grids, and independent network connectivity while staying within one Region.
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: The requirement is to distribute incoming HTTP traffic evenly across multiple EC2 instances. An Application Load Balancer operates at Layer 7 (HTTP/HTTPS) and is specifically designed to route and balance HTTP traffic across registered targets. Auto Scaling manages instance count, not traffic distribution. Gateway Load Balancer is for network appliances. Network Load Balancer operates at Layer 4 and is not required when HTTP-level routing is desired.
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: The requirement is to migrate container workloads while avoiding server management and unplanned operational costs, and to adopt a serverless architecture. AWS Fargate is a serverless compute engine for containers that removes the need to provision or manage EC2 instances and charges only for resources used. The other options are not serverless container platforms.
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) allows users to define and provision AWS infrastructure using code (in languages like TypeScript, Python, Java, etc.), which is then deployed via AWS CloudFormation. The other options do not provide infrastructure provisioning capabilities.
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 costs vary with usage instead of being fixed upfront. This directly corresponds to the cloud advantage of trading fixed expenses (owning and operating infrastructure) for variable expenses (pay only for what you use).
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: Automated video analysis to identify people requires computer vision and facial recognition. Amazon Rekognition provides image and video analysis capabilities, including face detection and face recognition, which can be used to identify employees accessing offices. The other options do not analyze video content.
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 data for malicious activity and unauthorized behavior using logs such as CloudTrail, VPC Flow Logs, and DNS logs. The other options focus on DDoS protection (Shield), firewall policy management (Firewall Manager), or vulnerability assessments (Inspector).
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