A company wants to deploy an application in multiple Availability Zones in a single AWS Region.
Which benefit will this deployment provide to the company?
A. Improved connection performance for global customers
B. Resilient architecture and a highly available solution
C. Reduced overall data storage costs
D. Ability to shut down an Availability Zone during periods of low demand
Show Answer
Correct Answer: B
Explanation: Deploying an application across multiple Availability Zones within a single AWS Region provides redundancy and fault tolerance. If one Availability Zone experiences an outage, the application can continue operating from the other Availability Zone(s), improving resilience and high availability. It does not improve global customer latency (use multiple Regions or edge locations), reduce storage costs, or allow shutting down an Availability Zone on demand.
Question 304
Which recommendation can AWS Cost Explorer provide to help reduce cost?
A. Use a specific database engine.
B. Change the programming language for an application.
C. Deploy a specific operating system.
D. Terminate an idle instance.
Show Answer
Correct Answer: D
Explanation: AWS Cost Explorer provides cost optimization recommendations, including identifying underutilized or idle resources. It can recommend terminating or rightsizing idle EC2 instances to reduce costs. It does not recommend application programming languages, operating systems, or specific database engines as Cost Explorer cost-saving recommendations.
Question 305
A company needs to perform an audit of recent AWS account activity. The audit will investigate who initiated an event and what actions were performed.
Which AWS service should the company use to meet these requirements?
A. AWS Config
B. Amazon Rekognition
C. AWS CloudTrail
D. Amazon Simple Notification Service (Amazon SNS)
Show Answer
Correct Answer: C
Explanation: AWS CloudTrail records AWS account activity and API calls, including who initiated an event, when it occurred, and what actions were performed. It is the primary service for auditing and governance. AWS Config tracks resource configuration changes, Amazon Rekognition is for image/video analysis, and Amazon SNS is a messaging service.
Question 306
A company uses Amazon EC2 instances to run its application. The application needs to be available and running continuously for three or more years.
What type of EC2 instance should the company purchase for a discount on the EC2 pricing?
A. Reserved Instances
B. Spot Instances
C. On-Demand Instances
D. EC2 Fleet
Show Answer
Correct Answer: A
Explanation: Reserved Instances provide significant discounts compared to On-Demand pricing when you commit to a 1-year or 3-year term, making them appropriate for long-running, steady-state workloads. Spot Instances can be interrupted, On-Demand has no long-term discount commitment, and EC2 Fleet is a provisioning feature rather than a pricing model.
Question 307
Which Amazon EC2 Reserved Instances term commitment will give users the MOST cost savings?
A. 1 year
B. 2 years
C. 3 years
D. 5 years
Show Answer
Correct Answer: C
Explanation: Amazon EC2 Reserved Instances are offered with 1-year and 3-year term commitments. The 3-year term provides the greatest discount compared with the 1-year term. A 5-year Reserved Instance term is not offered, so 3 years is the longest available commitment and yields the most cost savings.
Question 308
A company is hosting a web application on Amazon EC2 instances. The company wants to implement custom conditions to filter and control inbound web traffic.
Which AWS service will meet these requirements?
A. Amazon GuardDuty
B. AWS WAF
C. Amazon Macie
D. AWS Shield
Show Answer
Correct Answer: B
Explanation: AWS WAF allows you to define custom rules and conditions to inspect, filter, and control inbound HTTP/HTTPS web traffic to applications hosted on services such as Amazon EC2 (typically via Application Load Balancer or CloudFront). GuardDuty detects threats, Macie discovers sensitive data, and Shield provides DDoS protection but not custom web request filtering.
Question 309
A company needs to host an application in a specific geographic area to comply with regulations.
Which feature of the AWS global infrastructure will help the company meet this requirement?
A. Scalability
B. Global footprint
C. Availability
D. Performance
Show Answer
Correct Answer: B
Explanation: The correct feature is the AWS global footprint. AWS Regions are separate geographic areas around the world, allowing customers to deploy applications in a specific region to satisfy data residency and regulatory requirements. Availability refers to resilience across Availability Zones within a Region, not choosing the geographic location. Scalability and performance do not address geographic compliance.
Question 310
Which AWS service can companies use to subscribe to RSS feeds for updates about all AWS service issues?
A. Amazon Simple Notification Service (Amazon SNS)
B. AWS Health Dashboard
C. AWS Config
D. AWS CodeCommit
Show Answer
Correct Answer: B
Explanation: The AWS Health Dashboard provides information about AWS service health and service events. AWS publishes RSS/Atom feeds for AWS service health updates, making the Health Dashboard the appropriate choice for subscribing to updates about AWS service issues. Amazon SNS is a messaging service but is not the AWS service that provides the RSS feed for overall AWS service issues. AWS Config and AWS CodeCommit are unrelated.
Question 311
A company must archive its documents by using a write-once, read-many (WORM) model to meet legal and compliance obligations.
Which feature of Amazon S3 can the company use to meet this requirement?
A. S3 Versioning
B. S3 bucket policy
C. S3 Glacier Vault Lock
D. S3 multi-factor authentication (MFA) delete
Show Answer
Correct Answer: C
Explanation: Amazon S3 Glacier Vault Lock is designed to enforce write-once, read-many (WORM) compliance controls by locking a vault with a retention policy that prevents deletion or modification for the specified retention period. S3 Versioning preserves versions but does not enforce WORM, bucket policies control access rather than immutability, and MFA Delete adds protection against deletion but does not provide WORM compliance.
Question 312
A company wants to estimate the cost for its AWS architecture solution before migration.
Which AWS service or feature will meet this requirement?
A. Amazon Detective
B. AWS Budgets
C. AWS Resource Explorer
D. AWS Pricing Calculator
Show Answer
Correct Answer: D
Explanation: AWS Pricing Calculator is the service designed to estimate the cost of an AWS architecture before deployment or migration. AWS Budgets monitors and manages spending after estimates or usage exist, Amazon Detective is for security investigations, and AWS Resource Explorer helps discover AWS resources rather than estimate costs.
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