A company has migrated its workload to the AWS Cloud. The company wants to optimize existing Amazon EC2 resources.
Which AWS services or tools provide this functionality? (Choose two.)
A. AWS Elastic Beanstalk
B. AWS Cost Explorer
C. Amazon Detective
D. AWS Compute Optimizer
E. AWS Billing Conductor
Show Answer
Correct Answer: B, D
Explanation: AWS Cost Explorer helps analyze and optimize EC2 spending by identifying usage patterns and cost-saving opportunities. AWS Compute Optimizer analyzes EC2 workloads and provides right-sizing recommendations based on utilization metrics, directly optimizing existing EC2 resources.
Question 303
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 improves fault tolerance. If one Availability Zone experiences a failure, the application can continue running in other zones, resulting in a resilient architecture and high availability.
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 analyzes usage and spending patterns and provides cost-saving recommendations such as identifying underutilized or idle resources. One common recommendation is to terminate idle EC2 instances to reduce unnecessary costs. It does not recommend programming languages, database engines, or operating systems.
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 and logs all API calls and account activity in an AWS account, including who initiated an event, when it occurred, and what actions were performed. This makes it the primary service for auditing and governance. AWS Config tracks resource configuration changes, not user actions; Amazon Rekognition is for image/video analysis; Amazon SNS is for messaging and notifications.
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: The application must run continuously for three or more years, which matches the use case for Reserved Instances. Reserved Instances provide significant discounts compared to On-Demand pricing when you commit to a 1- or 3-year term, while still offering reliable, uninterrupted capacity. Spot Instances can be interrupted, On-Demand has no long-term discount, and EC2 Fleet is a provisioning mechanism 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 or 3-year term commitments. A 3-year Reserved Instance provides the highest discount compared to On-Demand pricing, resulting in the most cost savings. AWS does not offer a 5-year Reserved Instance term, so 3 years is the longest and most cost-effective option available.
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 create custom rules and conditions to filter and control inbound HTTP/HTTPS traffic to web applications running on Amazon EC2, such as blocking or allowing requests based on IP addresses, headers, URIs, or request patterns. The other services focus on threat detection (GuardDuty), data discovery (Macie), or DDoS protection (Shield), not fine-grained 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 requirement is to host an application in a specific geographic area for regulatory compliance, such as data residency laws. AWS’s global footprint refers to its worldwide network of Regions and Availability Zones. By selecting a specific AWS Region, a company can ensure its application and data remain within a defined geographic location. Scalability, availability, and performance are benefits of AWS infrastructure but do not directly address geographic or regulatory placement requirements.
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 (also known as the AWS Service Health Dashboard) provides official updates on AWS service issues, maintenance events, and outages. AWS publishes RSS feeds from this dashboard that customers can subscribe to in order to receive updates about all AWS service issues. Other options like Amazon SNS, AWS Config, and AWS CodeCommit do not natively provide AWS-wide service health RSS feeds.
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: The requirement is for write-once, read-many (WORM) storage to meet legal and compliance obligations. Amazon S3 Glacier Vault Lock is specifically designed for this purpose: it allows you to lock a vault with a compliance or retention policy that prevents objects from being modified or deleted for a defined period (or indefinitely). The other options do not guarantee immutability—versioning, bucket policies, and MFA delete can help protect data but do not enforce true WORM behavior required for compliance.
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