Adobe AD0-E134 Adobe Experience Manager Developer Exam Practice Test

The developer should add the defaultInjectionStrategy = DefaultInjectionStrategy property to the @Model Class annotation to fix the snippet. The defaultInjectionStrategy property defines how the Sling Model handles missing or null values for the injected fields. By default, the Sling Model uses the REQUIRED injection strategy, which means that all fields must have a non-null value or else an exception is thrown. By setting the defaultInjectionStrategy property to OPTIONAL, the Sling Model allows null values for the injected fields and does not throw an exception. This way, if the page field is null because the resource is not a page, the Sling Model can still work without errors. References: https://sling.apache.org/documentation/bundles/models.html https://sling.apache.org/documentation/bundles/models.html#optional-injection

The /enableTTL “1” configuration must be applied to enable re-fetching of cached items based on Cache Headers sent by AEM. This configuration enables the Time To Live (TTL) feature of dispatcher, which allows dispatcher to check the Cache-Control and Expires headers of the cached files and re-fetch them from AEM if they are expired. References:https://experienceleague.adobe.com/docs/experience-manager-dispatcher/using/configuring/page-invalidation.html?lang=en#time-based-cache-invalidation

The recommended way to make the secret key available in the AEM application is to use an environment variable which is then consumed by an OSGi configuration. This way, the secret key is not stored in the code base or in the repository, but rather in a secure and encrypted way in the Cloud Manager environment variables. The OSGi configuration can use a placeholder to reference the environment variable and inject its value at runtime. References: https://experienceleague.adobe.com/docs/experience-manager-cloud-service/implementing/deploying/configuring-osgi.html?lang=en#environment-variables https://experienceleague.adobe.com/docs/experience-manager-cloud-service/implementing/deploying/environment-variables.html?lang=en

The aemVersion property specifies the target AEM version for the project. To create a project based on AEM as a Cloud Service SDK, the value should be set to cloud. The sdkVersion property specifies the AEM as a Cloud Service SDK version to use for local development. To use a specific SDK version, the value should be set to the exact version number, such as 2022.5.7575.20220530T152407Z-220401. References: https://experienceleague.adobe.com/docs/experience-manager-core-components/using/developing/archetype/using.html?lang=en#properties https://experienceleague.adobe.com/docs/experience-manager-cloud-service/implementing/developing/aem-as-a-cloud-service-sdk.html?lang=en#sdk-versions

A Synonym filter can help to map different terms that have the same meaning, such as “cat” and “feline”. A LowerCase filter can help to normalize the case of the terms, so that “cats and dogs” and “Cats and Dogs” are treated the same.

The recommended path to override /libs standard functionality is /apps. The /apps folder contains application-specific code and configuration that can extend or override the default functionality provided by /libs. The /apps folder has precedence over the /libs folder, meaning that if there are two resources with the same path under both folders, the one under /apps will be used. References: https://experienceleague.adobe.com/docs/experience-manager-cloud-service/implementing/developing/aem-project-content-package-structure.html?lang=en#repository-restrictions https://experienceleague.adobe.com/docs/experience-manager- learn/foundation/development/set-up-a-local-aem-development-environment.html?lang=en#the-aem-repository

The @Component(service = ConfigurationFactory.class) @Designate(ocd = ConfigurationFactorylmpl.Config.class,factory=true) option is recommended for creating a multi-tenancy configuration and binding multiple configurations to it. This option uses the OSGi R6 annotations to define a component that provides a service of type ConfigurationFactory and designates a class that contains the configuration properties. The factory=true attribute indicates that multiple configurations can be created for this component. References:https://experienceleague.adobe.com/docs/experience-manager-65/deploying/configuring/osgi-configuration-settings.html?lang=en#creating-factory-configurations