QUESTION: 9

Assume that $collection is a new instance of a class that extends Magento\Framework\Model\ResourceModel\Db\Collection\AbstractCollection, and $ids is an array of ids.
How do you select a list of records from the database where the record ids are in the $ids list?

Option A
Option B
Option C
Option D

Answer(s): A

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QUESTION: 10

While reviewing a layout file named sales_order_view.xml you notice the element

<update handle="customer_account"/>
What is the purpose of this element?

Replaces the customer_account handle with sales_order_view
Nothing, this element has been deprecated
Adds the customer_account handle to the page's handles list
Updates the current page handle to customer_account

Answer(s): C

Reference:

https://devdocs.magento.com/guides/v2.2/frontend-dev-guide/layouts/xml- instructions.html#fedg_layout_xml-instruc_ex_upd

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QUESTION: 11

You have to install a new module on the production environment. All the module is adding a new product attribute. You enabled maintenance mode, copied the module code, run bin/magento setup:upgrade and disabled maintenance mode.
What two risks does this process pose? (Choose two.)

It will clean all caches which will cause a performance degradation
The new attribute will be invisible on the storefront until the cache is cleaned manually
It will void all active sessions
It will clean static assets from the pub/static folder

Answer(s): B,C

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QUESTION: 12

Magento 2's architecture uses code to bootstrap a custom module that resides in app/code.
What two files are required to make a module usable? (Choose two.)

Helper/Data.php
etc/config.xml
etc/module.xml
registration.php

Answer(s): C,D

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QUESTION: 9

QUESTION: 10

Reference:

QUESTION: 11

QUESTION: 12

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