Azure Event Grid Quiz
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What is Azure Event Grid?

  • A relational database management system
  • A file storage service
  • A serverless event broker for integrating applications using events (correct)
  • A cloud-based virtual machine service

    • What do publishers do in Azure Event Grid?

  • Handle events without emitting them
  • Emit events without expectations about how the events are handled (correct)
  • Expect specific handling for each emitted event
  • Filter events before emitting them

    • What does Event Grid allow you to do with events?

  • Manually process events one by one
  • Store events in a relational database
  • Limit the number of events emitted
  • Easily build applications with event-based architectures (correct)

    • What are the common information included in every event in Azure Event Grid?

    <p>Source of the event, time the event took place, and unique identifier</p> Signup and view all the answers

    What is an event source in Event Grid?

    <p>The place where the event happens</p> Signup and view all the answers

    What is a topic used for in Event Grid?

    <p>A collection of related events</p> Signup and view all the answers

    What are system topics in Event Grid?

    <p>Built-in topics provided by Azure services</p> Signup and view all the answers

    What does a subscription tell Event Grid?

    <p>Which events on a topic you're interested in receiving</p> Signup and view all the answers

    What is an event handler in Event Grid?

    <p>The place where the event is sent</p> Signup and view all the answers

    What is the responsibility of event sources in Event Grid?

    <p>Sending events to Event Grid</p> Signup and view all the answers

    What is the purpose of custom topics in Event Grid?

    <p>Application and third-party topics</p> Signup and view all the answers

    What is the mechanism for guaranteeing the delivery of events for HTTP webhook event handlers in Event Grid?

    <p>The event is retried until the handler returns a status code of 200 – OK</p> Signup and view all the answers

    What is the maximum size limit for the array when posting events to an Event Grid topic?

    <p>1 MB</p> Signup and view all the answers

    How are operations charged for events over 64 KB in Azure Event Grid?

    <p>In 64 KB increments</p> Signup and view all the answers

    What happens if an event or the array exceeds the size limits when posting events to an Event Grid topic?

    <p>Receive the response 413 Payload Too Large</p> Signup and view all the answers

    What determines the data object for custom topics in Azure Event Grid?

    <p>The event publisher</p> Signup and view all the answers

    What should the top-level data have when publishing events to custom topics?

    <p>The same fields as standard resource-defined events</p> Signup and view all the answers

    What is the purpose of providing the path for where the event happened in the subject?

    <p>To enable subscribers to filter by segments of the path</p> Signup and view all the answers

    What is the benefit of using CloudEvents schema in Azure Event Grid?

    <p>Simplifies interoperability and provides a common event schema</p> Signup and view all the answers

    What is the difference in the header values for events delivered in CloudEvents schema and Event Grid schema?

    <p>content-type header value</p> Signup and view all the answers

    When can CloudEvents be used in Azure Event Grid?

    <p>For system events and custom events</p> Signup and view all the answers

    What is the purpose of providing a common event schema in CloudEvents?

    <p>To enable easy integration of work across platforms</p> Signup and view all the answers

    What is the benefit of using Event Grid for both input and output of events in CloudEvents schema?

    <p>It allows for transforming events on the wire back and forth</p> Signup and view all the answers

    What is the responsibility of subscribers in Event Grid?

    <p>To use the subject to filter and route events</p> Signup and view all the answers

    What is the default delivery behavior of Event Grid for each subscription?

    <p>Delivers one event at a time to the subscriber immediately</p> Signup and view all the answers

    What does Event Grid do if the error returned by the subscribed endpoint is a configuration-related error that can't be fixed with retries?

    <p>Dead-letters the event or drops the event if dead-letter isn't configured</p> Signup and view all the answers

    What happens if the endpoint hasn’t responded after 30 seconds of delivering a message?

    <p>The message is queued for retry</p> Signup and view all the answers

    What is the retry policy used by Event Grid for event delivery?

    <p>Exponential backoff retry policy</p> Signup and view all the answers

    What is the purpose of delayed delivery in Event Grid?

    <p>To protect unhealthy endpoints and the Event Grid system</p> Signup and view all the answers

    When does Event Grid dead-letter an event?

    <p>When it can't deliver an event within a certain time period or after trying to deliver the event a number of times</p> Signup and view all the answers

    What happens if Event Grid receives a 400 (Bad Request) or 413 (Request Entity Too Large) response code?

    <p>It immediately schedules the event for dead-lettering</p> Signup and view all the answers

    How can you enable dead-lettering for undelivered events in Event Grid?

    <p>Specify a storage account to hold undelivered events when creating the event subscription</p> Signup and view all the answers

    What is the purpose of output batching in Event Grid?

    <p>To improve HTTP performance in high-throughput scenarios</p> Signup and view all the answers

    How does Event Grid handle retries for consistently unhealthy endpoints?

    <p>It may opportunistically skip certain retries</p> Signup and view all the answers

    What happens if the dead-letter location is unavailable for four hours?

    <p>The event is dropped</p> Signup and view all the answers

    What is the maximum number of custom headers that can be set when creating an event subscription in Event Grid?

    <p>10</p> Signup and view all the answers

    What is the purpose of custom delivery properties in Event Grid?

    <p>To set up HTTP headers included in delivered events</p> Signup and view all the answers

    When is batching turned on by default in Event Grid?

    <p>It is turned off by default</p> Signup and view all the answers

    What does Event Grid do if an endpoint is overwhelmed?

    <p>It may opportunistically skip certain retries</p> Signup and view all the answers

    What is the functional purpose of delayed delivery in Event Grid?

    <p>To protect unhealthy endpoints and the Event Grid system</p> Signup and view all the answers

    What type of access control does Azure Event Grid use?

    <p>Azure role-based access control (Azure RBAC)</p> Signup and view all the answers

    Which built-in role allows the creation and management of Event Grid resources?

    <p>Event Grid Contributor</p> Signup and view all the answers

    What permission is required to write a new subscription at the scope of the resource that is the event source?

    <p>Microsoft.EventGrid/EventSubscriptions/Write</p> Signup and view all the answers

    What is the purpose of the Event Grid Subscription Reader and Event Grid Subscription Contributor roles?

    <p>Managing event subscriptions</p> Signup and view all the answers

    What is the responsibility of the Event Grid Data Sender role?

    <p>Send events to Event Grid topics</p> Signup and view all the answers

    What does the Event Grid Subscription Contributor role enable you to do?

    <p>Manage Event Grid event subscription operations</p> Signup and view all the answers

    What is the primary function of the Event Grid Contributor role?

    <p>Create and manage Event Grid resources</p> Signup and view all the answers

    What does Event Grid do if the error returned by the subscribed endpoint is a configuration-related error that can't be fixed with retries?

    <p>Dead-letter the event or drop the event if dead-letter isn't configured</p> Signup and view all the answers

    What type of errors would prevent Event Grid from retrying event delivery for Azure Resources endpoints?

    <p>400 Bad Request, 413 Request Entity Too Large, 403 Forbidden</p> Signup and view all the answers

    What happens if Dead-Letter isn't configured for an endpoint when certain errors occur?

    <p>Events will be dropped</p> Signup and view all the answers

    What is the default behavior of Event Grid for event delivery in terms of order?

    <p>Doesn't guarantee order for event delivery</p> Signup and view all the answers

    What is the default maximum number of attempts for retry policy when creating an event subscription in Event Grid?

    <p>30</p> Signup and view all the answers

    What is the default event time-to-live (TTL) value for an event subscription in Event Grid?

    <p>1440 minutes</p> Signup and view all the answers

    What is the maximum number of events that can be delivered per batch by Event Grid?

    <p>5000</p> Signup and view all the answers

    What is the target ceiling for batch size in kilobytes for batched delivery in Event Grid?

    <p>10 KB</p> Signup and view all the answers

    What happens if the dead-letter location is unavailable for four hours?

    <p>Event is dropped</p> Signup and view all the answers

    What is the maximum number of custom headers that can be set when creating an event subscription in Event Grid?

    <p>10</p> Signup and view all the answers

    What is the default value for the maximum number of attempts for retry policy when creating an event subscription in Event Grid?

    <p>30</p> Signup and view all the answers

    What is the default event time-to-live (TTL) value for an event subscription in Event Grid?

    <p>1440 minutes</p> Signup and view all the answers

    What does Event Grid do if it receives a 400 (Bad Request) or 413 (Request Entity Too Large) response code?

    <p>Schedules the event for dead-lettering</p> Signup and view all the answers

    What is the purpose of delayed delivery in Event Grid?

    <p>To protect unhealthy endpoints and the Event Grid system</p> Signup and view all the answers

    What are the system topics used for in Event Grid?

    <p>Azure service health notifications</p> Signup and view all the answers

    What does filtering by event type allow you to do when creating an event subscription?

    <p>Send only certain event types to your endpoint</p> Signup and view all the answers

    How can you filter events based on subject in Event Grid?

    <p>Specify a starting or ending value for the subject</p> Signup and view all the answers

    What does advanced filtering in Event Grid allow you to do?

    <p>Filter by values in the data fields and specify the comparison operator</p> Signup and view all the answers

    What JSON syntax is used for filtering by event type in Event Grid?

    <p>Provide an array with the event types, or specify All to get all event types for the event source</p> Signup and view all the answers

    Study Notes

    Azure Event Grid Overview

    • Azure Event Grid is a fully managed event routing service that simplifies event-based architectures.
    • It allows for the integration of various Azure services and supports custom applications to react to events.

    Publishers in Azure Event Grid

    • Publishers are entities that send events to Event Grid, allowing other services to process these events.
    • Any application or service can act as a publisher, sending notifications or data to Event Grid for routing.

    Event Grid Capabilities

    • Event Grid allows for the management of high-volume and diverse event streams efficiently.
    • It facilitates building applications that respond in real-time to events.

    Common Event Information

    • Every event in Event Grid typically includes:
      • ID: Unique identifier for the event.
      • Subject: The path or resource where the event occurred.
      • Time: Timestamp of when the event occurred.
      • Data: Payload or content of the event.

    Event Sources and Topics

    • An event source is any entity that publishes events, such as Azure services or custom applications.
    • A topic serves as a conduit for event publishing; it acts as an endpoint for event sources to send events.

    System Topics

    • System topics are predefined topics provided by Azure, linked to specific Azure services that generate events.

    Event Subscription

    • An event subscription instructs Event Grid on where to send events corresponding to certain criteria.
    • It acts as a connection between events generated by sources and event handlers (responses).

    Event Handlers

    • An event handler is a service or application that processes events delivered via Event Grid.

    Responsibilities of Event Sources

    • Event sources are responsible for creating and sending events to the Event Grid based on triggers.

    Custom Topics

    • Custom topics allow for the integration of non-Azure events, enabling custom applications to provide their events.

    Event Delivery Mechanism

    • HTTP webhook event handlers utilize a delivery guarantee mechanism that includes retries in case of failure.

    Size Limits and Charging

    • Maximum size for the array of events posted to a topic is typically 64 KB.
    • Events larger than this limit are charged differently based on Azure pricing.

    Handling Size Exceedance

    • If an event exceeds size limits, it cannot be processed, necessitating proper structuring of the events.

    Data Object for Custom Topics

    • The data object for custom topics is determined by the publisher and must follow a specific schema.

    Top-Level Data in Custom Topics

    • The top-level data for published events should clearly define the context and payload details necessary for processing.

    Subject Path

    • Providing the path where the event occurred in the subject aids in filtering and organizing events within Event Grid.

    CloudEvents Schema

    • Utilizing the CloudEvents schema provides a standardized way to describe events, ensuring compatibility and consistency across systems.

    Header Values in Event Delivery

    • There are differences in header values between CloudEvents schema and Event Grid schema; key distinctions support different processing requirements.

    Availability of CloudEvents

    • CloudEvents can be integrated in Event Grid when interoperability between services is needed.

    Common Event Schema Usage

    • A unified event schema in CloudEvents enables easier consumption and understanding of events across different platforms.

    Input and Output Benefits of Event Grid

    • Event Grid allows both input and output for events using the CloudEvents schema, enhancing system integration.

    Subscribers' Role

    • Subscribers in Event Grid process events according to their specific use cases, often triggering automation or workflows.

    Default Delivery Behavior

    • Event Grid’s default delivery attempts ensure reliable processing unless a configuration error prevents further retries.

    Error Handling Policies

    • Unrecoverable errors that relate to configuration issues lead to event tracking but halt delivery retries.

    Response Timeout

    • If an endpoint does not respond within 30 seconds, Event Grid considers the delivery attempt failed, initiating retries.

    Retry Policy

    • Event Grid employs a retry policy with a maximum retry window typically spanning several hours for successful event delivery.

    Delayed Delivery Purpose

    • Delayed delivery serves to manage workloads and avoid overwhelming event handlers.

    Dead-Lettering Events

    • Events are dead-lettered after failing to deliver after multiple retries, enabling review and manual processing later.

    Exception Handling Codes

    • Event Grid reacts to a 400 (Bad Request) or 413 (Request Entity Too Large) response by logging the failure and stopping further deliveries.

    Dead-Lettering Configuration

    • Dead-lettering can be set up to manage events that were undeliverable to specific endpoints.

    Output Batching Purpose

    • Output batching minimizes the number of requests made to endpoints, improving efficiency in event delivery.

    Event Retry Handling

    • Continually unhealthy endpoints trigger an alternative resolution strategy, ensuring event processing is redirected appropriately.

    Unavailability of Dead-Letter Location

    • If the dead-letter location is unavailable for four hours, Event Grid will cease subsequent dead-lettering attempts.

    Custom Headers

    • A maximum of 5 custom headers can be configured when creating an event subscription to tailor event properties.

    Custom Delivery Properties

    • Custom delivery properties facilitate enhanced routing and processing of events post-delivery.

    Default Batching

    • Batching is enabled by default for high-volume event applications, optimizing resource usage.

    Overwhelmed Endpoints

    • If endpoints are overwhelmed, Event Grid can delay deliveries temporarily or use exponential backoff strategies.

    Access Control in Event Grid

    • Azure Event Grid employs Role-Based Access Control (RBAC) for fine-tuning permissions and access.

    Built-In Roles

    • The Event Grid Contributor role allows full management and creation capabilities for Event Grid resources.

    Subscription Permissions

    • Writing a subscription to the resource requires specific permissions outlining access levels.

    Event Grid Subscription Roles

    • Event Grid Subscription Reader and Contributor roles manage access to view and edit event subscriptions.

    Data Sender Role

    • This role is responsible for sending events to Event Grid, facilitating input to the service.

    Transaction Management

    • Event Grid systematically processes and manages events for reliable end-to-end tracking.

    Event Delivery Order

    • Event Grid does not guarantee order of event delivery by default, which can affect workflow timing.

    Retry Attempts

    • Default maximum retries for event delivery in Event Grid is typically set to 30 attempts.

    Event Time-to-Live (TTL)

    • The event TTL value signifies how long an event remains valid within the system.

    Batch Delivery Limits

    • Event Grid has a maximum batch size of typically 1 MB for delivering events efficiently.

    Response Handling for Errors

    • On receiving 400 or 413 response codes, Event Grid logs the error and suspends the attempt for that specific event.

    System Topics and Filtering

    • System topics facilitate event management by categorizing events from Azure services, allowing for easier filtering based on event type.

    Advanced Filtering Capabilities

    • Advanced filtering enables precise criteria-setting for event subscription, enhancing targeted event routing.

    JSON Filtering Syntax

    • JSON syntax is utilized for filtering by event type, enabling specified manipulation of event streams in Event Grid.

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