Task Statement 3.2: Implement Solutions That Are Scalable to Meet Business Requirements. DOP-C02 Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   A database-backed application is experiencing high read traffic, causing the database to become a bottleneck. The team wants to reduce the load on the database by caching frequently accessed query results. Which AWS service is BEST suited for this use case?

   • AAmazon DynamoDB Accelerator (DAX)
   • BAmazon ElastiCache
   • CAmazon S3
   • DAmazon CloudFront
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   A web application experiences variable traffic patterns. The application is memory-intensive, and each request consumes a predictable amount of memory. The team wants to scale the fleet of EC2 instances based on the workload. Which metric is the MOST appropriate to use for a target tracking scaling policy?

   • ARequest count per target
   • BCPU utilization
   • CNetwork I/O
   • DMemory utilization
   Reveal Solution Discussion Select an answer first
4. 18foundation · easy

   A team is redesigning a monolithic application to improve scalability. The goal is to allow the order-processing component to scale independently from the web frontend. Which architectural pattern BEST achieves this goal?

   • ADeploy both components on the same EC2 instances with a larger instance type
   • BPlace both components behind the same Application Load Balancer
   • CDecouple the components using an Amazon SQS queue between the frontend and the order processor
   • DUse a shared database to coordinate the components
   Reveal Solution Discussion Select an answer first
5. 19expert · hard

   An e-commerce platform uses an Auto Scaling group with a step scaling policy based on CPU utilization. During a traffic spike, the group repeatedly adds and removes instances every few minutes, causing instability and increased costs. The application is stateless and instances take about 3 minutes to become healthy. What is the most effective remediation?

   • AIncrease the cooldown period and lower the step adjustment thresholds
   • BDisable scale-in policies and manually terminate instances during off-peak hours
   • CUse a simpler metric like NetworkIn to avoid rapid fluctuations
   • DSwitch to a target tracking policy with a higher target value and longer warm-up time
   Reveal Solution Discussion Select an answer first
6. 20application · medium

   A company runs a fleet of EC2 instances that host a TCP-based application. The application requires very low latency and the ability to handle millions of requests per second. The team needs a load balancer that can scale to these levels without being a bottleneck. Which load balancer should they choose?

   • AGateway Load Balancer
   • BApplication Load Balancer
   • CClassic Load Balancer
   • DNetwork Load Balancer
   Reveal Solution Discussion Select an answer first