Adobe AD0-E720 Exam Questions

To access a view model within an existing block, the developer can use either of the following ways:

$block->getData('view_model'): This method will return the view model object that is assigned to the argument name ''view_model'' in the layout XML file. For example:

<referenceBlock name=''blog_posts_list''> ExampleObjectModel/ExampleObjectModel </referenceBlock>

In the template file, the developer can access the view model object by using:

$block->getData('view_model')

$block->getData('viewModel'): This method will return the view model object that is assigned to the argument name ''viewModel'' in the layout XML file. For example:

<referenceBlock name=''blog_posts_list''> ExampleObjectModel/ExampleObjectModel </referenceBlock>

In the template file, the developer can access the view model object by using:

$block->getData('viewModel')

The following methods are not valid and will not work:

$block->viewModel(): This method does not exist and will cause an error.

$block->getViewHodel(): This method is misspelled and will cause an error.

In client-side compilation mode, the stylesheet customizations will display immediately after reloading a page in a browser. This is because in this mode, the LESS files are compiled into CSS files by the browser using JavaScript. This mode is useful for development and debugging purposes, as it allows quick changes and previews of the styles. However, this mode is not recommended for production, as it can affect the performance and compatibility of the site. The other modes, server-side compilation and LESS compilation, require running commands or tools to compile the LESS files into CSS files on the server side, which can take some time and delay the display of the customizations. Reference: [Compilation modes], [Compile LESS]

The bin/magento dev:source-theme:deploy command is used to create symlinks for frontend theme files during development. This command allows the developer to modify source files without running static content deployment every time. The developer can use parameters to specify the type, locale, theme, and file names for creating symlinks. For example, to create symlinks for a CSS file named styles-l.css for the Vendor/Orange theme and the en_US locale, the developer can use:

bin/magento dev:source-theme:deploy --type=less --locale=en_US --theme=Vendor/Orange css/styles-l

The other two options are incorrect because they do not create symlinks for frontend theme files. The bin/magento dev:theme:deploy command is used to register themes with Magento and clear caches. The bin/magento deploy:mode:set command is used to change the application mode. Reference:Adobe Commerce Developer Documentation,Adobe Inc.

To customize a JavaScript component that is written as a function, the developer can use option A. This option will use the prototype property of the function to extend its functionality and add new methods or properties. For example:

function Component() { // Component logic }

Component.prototype.customMethod = function() { // Custom method logic };

This will create a new method called customMethod on the prototype of the Component function, which can be accessed by any instance of the Component object. The developer can also override existing methods or properties on the prototype by reassigning them with new values.

Option B is not correct because it will not extend the native JavaScript function, but create a new function that wraps the original function. This will not allow the developer to access or modify the properties or methods of the original function. Option C is not correct because it will not extend the native JavaScript function, but create a new object that inherits from the original function. This will not allow the developer to customize the original function itself, but only its instances.

The bin/magento dev:source-theme:deploy command is used to create symlinks for frontend theme files during development. This command allows the developer to modify source files without running static content deployment every time. The developer can use parameters to specify the type, locale, theme, and file names for creating symlinks. For example, to create symlinks for a CSS file named styles-l.css for the Vendor/Orange theme and the en_US locale, the developer can use:

bin/magento dev:source-theme:deploy --type=less --locale=en_US --theme=Vendor/Orange css/styles-l

The other two options are incorrect because they do not create symlinks for frontend theme files. The bin/magento dev:theme:deploy command is used to register themes with Magento and clear caches. The bin/magento deploy:mode:set command is used to change the application mode. Reference:Adobe Commerce Developer Documentation,Adobe Inc.