ExpertMedium1 markMultiple Choice
AWS SAP-C02 · Question 53 · Domain 2.4: Reliability Requirements
A popular news website experiences massive, unpredictable spikes in traffic during breaking news events. The site is hosted on EC2 instances behind an ALB, with an Amazon RDS database. During spikes, the database is overwhelmed by read requests for the same articles, causing the site to crash. What is the MOST effective architectural change to improve reliability?
A popular news website experiences massive, unpredictable spikes in traffic during breaking news events. The site is hosted on EC2 instances behind an ALB, with an Amazon RDS database. During spikes, the database is overwhelmed by read requests for the same articles, causing the site to crash. What is the MOST effective architectural change to improve reliability?
Answer options:
A.
Increase the maximum size of the EC2 Auto Scaling group.
B.
Migrate the RDS database to Aurora Multi-Master.
C.
Place Amazon CloudFront in front of the ALB to cache static and dynamic content.
D.
Implement Amazon SQS to decouple the web tier from the database tier.
How to approach this question
Identify the caching layer that absorbs read-heavy traffic spikes at the edge.
Full Answer
C.Place Amazon CloudFront in front of the ALB to cache static and dynamic content.✓ Correct
Place Amazon CloudFront in front of the ALB to cache static and dynamic content.
For read-heavy, unpredictable traffic spikes (like breaking news), a Content Delivery Network (CDN) like Amazon CloudFront is the best solution. It caches the content at edge locations globally, absorbing the traffic spike before it ever reaches the origin infrastructure.
Common mistakes
Trying to scale the backend (Auto Scaling/RDS) instead of caching at the edge.
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