Magento Magento-2-Certified-Associate-Developer 問題集

質問 1：
How can you access the select query of a collection?
A. The select query is not available in the collection class, it will be generated by the MySQL adapter right before executing a query
B. You can get it by using public method getSelect() which returns an instance of Magento\Framework\DB\Select
C. You can only access the select query after the collection has been loaded by calling the public method query()
D. It is stored in a protected variable $query and can only be accessed from the inside of a collection class
正解：B

質問 2：
You are building a report using complex SQL aggregations to locate the required data.
In what type of class do you put these SQL statements?
A. Resource model
B. Model
C. Repository
D. Helper
正解：A

質問 3：
You have created a custom module which must perform an action immediately after an order is placed, but only on the store front of the merchant site. You have selected the checkout_submit_all_after as the target event which the module will observe.
In which file will the event observer be declared?
A. etc/events.xml
B. etc/config.xml
C. etc/frontend/events.xml
D. etc/frontend.xml
正解：C

質問 4：
You need to find all orders in the processing state. You have written the code:

How do you resolve the exception?
A. Change the getList parameter to: $searchCriteraBuilder->addFilter('state','processing')->create()
B. Clear generated code to get a new version of SearchCriteriaBuilder
C. Specify a preference in di.xml to map SearchCriteriaBuilder to SearchCriteriaInterface
D. Use dependency injection to load an instance of the SearchCriteria class
正解：A

質問 5：
You are adding a child node to the product.info block using the XML:

How will this block be rendered?
A. By calling $block->getChildHtml('mynewblock') in the parent block's template
B. Child block nodes are automatically rendered as HTML
C. Automatically if the block class Custom implements the _toHtml method
D. The layout is invalid since block elements cannot be nested
正解：A

質問 6：
A client has asked you to include category url keys in product URLs.
How is this done?
A. Create an after plugin on \Magento\UrlRewrite\Controller\Router::generateRewrite
B. This is not possible because products can belong to multiple categories
C. Create an observer for controller_action_postdispatch_catalog_product_view
D. Set the configuration value of catalog/seo/product_use_categories to Yes
正解：D