ACloud Guru Certified Cloud Practitioner Practice Exam

What is a significant feature of AWS Elastic Load Balancer that ensures application stability?

1. Automated backups of instances

2. Health checks on registered targets

3. Traffic analysis

4. Increased storage capacity

The correct answer is: Health checks on registered targets

A significant feature of AWS Elastic Load Balancer that ensures application stability is health checks on registered targets. Health checks play a crucial role in maintaining the performance and reliability of applications deployed on AWS. When an Elastic Load Balancer routes traffic to various registered targets, it continuously monitors the health of these targets through regular health checks. These checks assess whether the instances or services behind the load balancer are functioning properly and can handle requests effectively. If a registered target fails the health check – meaning it does not respond in a timely manner or returns an error – the load balancer will automatically redirect traffic away from that unhealthy target to other healthy targets. This process minimizes downtime and prevents users from being directed to malfunctioning applications, thereby enhancing overall application stability and user experience. In contrast, the other options do not directly contribute to the stability of the application as effectively. Automated backups of instances are important for data recovery but do not impact the performance of live applications. Traffic analysis helps understand traffic patterns but does not actively manage health or availability. Increased storage capacity is beneficial for handling data but does not relate directly to load balancing or ensuring application stability in real-time operations.