AWS EventBridge Interview Guide: 10 Must-Know Questions

1. What is AWS EventBridge?

AWS EventBridge is a serverless event bus service that enables you to connect your applications with data from various sources, facilitating communication between your applications and services. It simplifies the process of ingesting, filtering, and routing events to multiple targets, allowing you to build event-driven architectures and manage the flow of information between decoupled components.

2. Can you explain the difference between Amazon EventBridge and Amazon SNS?

Amazon EventBridge is a serverless event bus designed for event-driven architectures, while Amazon Simple Notification Service (SNS) is a messaging service that enables you to send messages to multiple subscribers. EventBridge allows you to ingest, filter, and route events from various sources, whereas SNS focuses on sending messages or notifications to a specific set of subscribers via different protocols, such as email, SMS, or HTTP.

3. What are the primary components of AWS EventBridge?

The primary components of AWS EventBridge are:

• Event Sources: The services or applications that generate events.
• Event Bus: The central component that receives and routes events.
• Rules: Define the conditions for event processing and routing to targets.
• Targets: The services or applications that receive and process events.

4. How do you create an EventBridge rule?

To create an EventBridge rule, follow these steps:

1. Sign in to the AWS Management Console and navigate to the EventBridge console.
2. Choose ‘Create rule’.
3. Enter a name and description for the rule.
4. Define the event pattern or schedule, depending on your requirements.
5. Select or create the targets to which the event will be sent.
6. Configure input settings and tags, if necessary.
7. Click ‘Create’ to finalize the rule.
8. What are some common use cases for AWS EventBridge?

Some common use cases for AWS EventBridge include:

• Application integration: Connect various services to create an event-driven architecture.
• Monitoring and alerting: Route events from AWS services to monitoring and alerting tools.
• Security and compliance: Detect and respond to security threats or compliance violations.
• Custom application events: Send and process custom events from your applications.

6. How does EventBridge handle event filtering?

EventBridge uses rules to filter events based on event patterns. You can define rules with specific event patterns, which determine whether the event should be routed to the specified target. Event patterns can include filtering based on the event source, detail type, resources, or specific attributes within the event detail.

7. Can you explain the difference between an event pattern and an event schedule in AWS EventBridge?

An event pattern is a set of criteria that an event must meet to be processed by a specific rule. In contrast, an event schedule is a time-based configuration that triggers an event at a specified interval or cron expression.

8. How does AWS EventBridge ensure reliability and durability?

AWS EventBridge ensures reliability and durability by providing at-least-once delivery of events to targets. If an event fails to be delivered to the target, EventBridge retries the delivery until it succeeds or reaches a specified maximum number of attempts.

9. What are the supported event sources in AWS EventBridge?

EventBridge supports several event sources, including AWS services, SaaS applications, custom applications, and other partner event sources. Some examples of AWS service event sources are EC2, S3, and Lambda, while SaaS applications may include Zendesk, PagerDuty, or Auth0.

10. How do you secure events in AWS EventBridge?

You can secure events in AWS EventBridge by:

• Using AWS Identity and Access Management (IAM) policies to control access to the event buses, rules, and targets.
• Encrypting events in transit using HTTPS endpoints for target services.
• Optionally, using AWS Key

Management Service (KMS) to encrypt events at rest within EventBridge.

• Using AWS PrivateLink to keep event data within your VPC and reduce exposure to the public internet.
• Monitoring and auditing events with AWS CloudTrail, which logs API calls made by or on behalf of EventBridge, providing visibility into your environment’s event activity.