Amazon Web Services Flashcards
7 cards from real Architecting on AWS Certification practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Amazon Web Services flashcards as text
A company needs to run a stateful workload that requires persistent block storage with consistent low-latency performance. Which AWS service is the best fit?
Answer: Amazon EBS
Amazon EBS provides persistent block storage with consistent low-latency performance ideal for stateful workloads like databases.
Which VPC feature allows instances in a private subnet to initiate outbound internet traffic without exposing them to inbound connections?
Answer: NAT Gateway
A NAT Gateway allows private subnet instances to initiate outbound internet connections while blocking unsolicited inbound traffic.
An architect wants to decouple a producer microservice from multiple consumer microservices using a fan-out pattern. Which combination of AWS services achieves this?
Answer: SNS to SQS
SNS publishes a message once and fans it out to multiple SQS queues, decoupling producers from consumers.
Which AWS Well-Architected pillar focuses on the ability of a system to recover from failures and dynamically acquire resources to meet demand?
Answer: Reliability
The Reliability pillar addresses recovering from failures and dynamically scaling to meet demand.
A workload requires storing session state shared across multiple EC2 instances in an Auto Scaling group. Which service is best suited for this?
Answer: Amazon ElastiCache
ElastiCache provides a fast, shared in-memory data store for session state accessible by all instances in an Auto Scaling group.
What is the primary purpose of an AWS Service Control Policy (SCP) in AWS Organizations?
Answer: Define guardrails for maximum permissions in member accounts
SCPs set permission guardrails that limit what actions can be performed in member accounts, regardless of IAM policies.
Which CloudFront feature allows you to run custom code at edge locations to modify HTTP requests and responses with sub-millisecond latency?
Answer: CloudFront Functions
CloudFront Functions execute lightweight JavaScript at edge locations with sub-millisecond startup for simple request/response manipulation.