Question 1

What is the minimum number of Availability Zones recommended to achieve High Availability in AWS?

Accepted 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?

Accepted 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?

Accepted 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?

Accepted 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?

Accepted 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.

AWS High Availability – Solutions Architect Associate

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