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Question 1
What is the minimum number of Availability Zones recommended to achieve High Availability in AWS?
Answer: A minimum of 2 Availability Zones is recommended so that if one AZ fails, the other can continue serving traffic.
Question 2
What is the difference between High Availability and Fault Tolerance in AWS?
Answer: High Availability minimizes downtime by allowing brief interruptions during failover, while Fault Tolerance means the system continues operating with zero interruption even during component failure.
Question 3
What AWS concept describes the ability of a system to recover automatically from infrastructure failures without human intervention?
Answer: Self-healing architecture, commonly implemented using Auto Scaling groups that automatically replace failed instances.
Question 4
Which AWS load balancer type operates at Layer 7 and supports host-based and path-based routing?
Answer: The Application Load Balancer (ALB) operates at Layer 7 (HTTP/HTTPS) and supports both host-based and path-based routing rules.
Question 5
Which load balancer type should you choose to handle millions of requests per second with ultra-low latency using TCP/UDP traffic?
Answer: The Network Load Balancer (NLB) operates at Layer 4 and is designed for extreme performance, handling millions of requests per second with ultra-low latency.