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#1. Your team wants to monitor unusual login attempts to your AWS account. Which tool should you use?
Explanation: GuardDuty detects security threats like unusual login attempts. Shield and Inspector focus on DDoS protection and vulnerabilities, respectively. Cost Anomaly Detection monitors billing, not security.
#2. A startup wants to launch a global app quickly without managing physical servers. Which AWS benefit aligns best with this goal?
Explanation: AWS’s global infrastructure enables rapid deployment across multiple regions without physical server management. The other options contradict cloud benefits.
#3. A startup wants predictable costs for their compute instances. Which pricing model should they choose?
Explanation: Reserved Instances offer predictable, discounted pricing for long-term commitments. Spot Instances are volatile, On-Demand is pay-as-you-go, and Savings Plans provide flexibility but not fixed rates.
#4. A company needs to analyze trends and detect anomalies in AWS cost and usage. Which tool is best?
Explanation: Cost Anomaly Detection identifies unexpected spending trends. Trusted Advisor provides best practice recommendations, CloudWatch monitors resources, and Resource Groups organize resources.
#5. A company wants to process user uploads directly as they arrive in S3. Which service enables event-driven execution?
Explanation: Lambda triggers can process events, such as S3 uploads. Glue is for ETL, Redshift for data warehousing, and Cost Explorer for billing analysis.
#6. Your company runs workloads on AWS and needs to track API activity for compliance. Which service should you use?
Explanation: CloudTrail logs all API activity for compliance and auditing. CloudWatch is for monitoring, X-Ray traces requests, and Config tracks configuration changes, not API activity.
#7. A team wants to store archived data cost-effectively while maintaining retrieval options. Which storage class should they choose?
Explanation: S3 Glacier provides low-cost storage for archival data with optional retrieval times. S3 Standard and Intelligent-Tiering are more expensive for frequent access. EBS Magnetic is for block storage, not archival.
#8. A developer needs a NoSQL database for a real-time gaming app. Which service is suitable?
Explanation: DynamoDB supports low-latency NoSQL operations for real-time apps. RDS and Aurora are relational, and S3 is object storage.
#9. Your company needs to monitor multiple AWS accounts for cost management. What should you use?
Explanation: Organizations manage multiple accounts and centralize cost monitoring. CloudFormation is for IaC, Lambda for compute, and Inspector for security.
#10. A company plans to migrate 10 TB of data to S3 but has limited internet bandwidth. Which AWS service is most appropriate?
Explanation: Snowball is a physical device for transferring large amounts of data offline. Direct Connect establishes dedicated network connections, Transfer Acceleration speeds up online transfers, and DataSync is for continuous sync but requires internet.
#11. A retail app needs high availability and failover between regions. Which AWS architecture feature is crucial?
Explanation: Cross-region replication ensures failover between regions. Multi-AZ is within a single region, ELB distributes traffic, and Auto Scaling adjusts resources but doesn’t replicate data.
#12. Your e-commerce platform needs to handle sudden increases in traffic during flash sales. What should you implement?
Explanation: Auto Scaling dynamically adjusts compute resources based on traffic. Cost Explorer tracks costs, Elastic Beanstalk simplifies application deployment, and DataSync is for data transfer.
#13. A business wants to encrypt sensitive data stored in S3. What should they use?
Explanation: Server-side encryption protects data in S3. Versioning tracks file changes, Transfer Acceleration speeds up uploads, and CloudWatch Logs is for monitoring.
#14. You need to distribute dynamic web content globally with low latency. Which service is best suited?
Explanation: CloudFront is a CDN for distributing web content globally with low latency. Glacier is for archival storage, Route 53 handles DNS, and Lambda is serverless compute.
#15. Your application requires near-zero downtime during updates. Which deployment strategy should you use?
Explanation: Blue/Green deployments switch traffic between environments, minimizing downtime. Rolling updates can cause partial unavailability, manual updates risk errors, and recreate deployments disrupt service.
#16. A team needs a relational database for analytics with automated backups. Which AWS service should they choose?
Explanation: RDS provides relational databases with automated backups. DynamoDB is NoSQL, S3 is object storage, and Redshift is a data warehouse, not a general-purpose relational database.
#17. Your company expects unpredictable spikes in web traffic during marketing campaigns. Which AWS design principle is most beneficial for this scenario?
Explanation: Elasticity allows automatic scaling up or down based on demand, ensuring resources match traffic spikes. Fixed provisioning and manual scaling can’t handle unpredictable traffic effectively. High latency is unrelated.
#18. A company needs to enforce the principle of least privilege for its employees. Which AWS service is most suitable?
Explanation: IAM enables fine-grained access control, implementing the least privilege principle effectively. Other services are not directly related to access control.
#19. A team wants to deploy and manage infrastructure as code. Which AWS service is the best choice?
Explanation: CloudFormation automates provisioning and management of AWS resources using code templates. CodeDeploy focuses on application deployment, OpsWorks on configuration management, and EC2 provides compute instances but lacks infrastructure management.
#20. A business wants to forecast future AWS usage costs. Which service should they use?
Explanation: Cost Explorer helps analyze and forecast costs. Budgets set cost limits but don’t forecast. Artifact is for compliance, and Inspector is for security.