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Answer : C

The best practice for adding test configuration data is to use a fixture file that contains the configuration values for different websites. The fixture file can be specified in the test method PHPDoc using the @magentoconfigFixture annotation. This way, the configuration data is isolated from the test code and can be reused for other tests. Reference: https://devdocs.magento.com/guides/v2.4/test/integration/annotations/magento-config-fixture.html

Answer : A, D

Asynchronous indexing allows Magento to process indexers in the background without affecting the storefront performance. Splitting the database allows Magento to use a separate database for checkout-related tables, which reduces the load on the main database and improves checkout performance. Reference: https://devdocs.magento.com/guides/v2.4/extension-dev-guide/indexing.html#asynchronous-indexing https://devdocs.magento.com/guides/v2.4/config-guide/multi-master/multi-master.html

To decrease the impact on checkout performance, the Architect should do two things:

Enable asynchronous indexing admin panel setting. This will allow Magento to update indexes using cron jobs instead of doing it on the fly during checkout. This option can be found under Stores > Settings > Configuration > Advanced > Developer > Grid Settings > Asynchronous indexing. It can also be enabled by executing the following CLI command: bin/magento config:set dev/grid/async_indexing 1

Create a new database and use the Split Database feature. This will allow Magento to separate the sales data from the main database and reduce the load on the database server. This option can be configured with the following command: bin/magento setup:db-schema:split-sales --host='<checkout db host or ip>' --dbname='<name>' --username='<checkout db username>' --password=''

https://devdocs.magento.com/guides/v2.4/extension-dev-guide/indexing.html#m2devgde-asynchronous-indexing

https://devdocs.magento.com/guides/v2.4/config-guide/multi-master/multi-master.html

Answer : C, E

To use Varnish as the full page cache, the cache type must be set to ''Varnish Caching'' in the Store Admin. This will enable the ''Flush Magento Cache'' button to send a purge request to Varnish. Additionally, the cache destination host must be specified using the magento CLI command to tell Magento which Varnish servers to purge. Reference: https://devdocs.magento.com/guides/v2.4/config-guide/varnish/config-varnish.html

Answer : C

The 'after' plugin is not suitable for modifying the arguments or return value of the original method. The 'around' plugin allows the plugin method to wrap around the original method and modify its behavior and output. Reference: https://devdocs.magento.com/guides/v2.4/extension-dev-guide/plugins.html#around-methods

Answer : C, D

To resolve the issue of product price changes not updating on the storefront, you need to take the following steps:

Make sure that no custom or third-party modules modify the changelog and indexing process. Some modules might interfere with the normal functioning of the indexing mechanism and cause data inconsistency or corruption. You can disable any custom or third-party modules that are related to indexing and check if the issue persists.

Make sure that the version_id for the price indexer in the mview_state table is not higher than the last entry for the same column in the changelog table and re-synchronize. The version_id column in the mview_state table indicates the current state of each indexer. If this value is higher than the last entry in the changelog table, it means that the indexer has skipped some records and needs to be re-synchronized. You can use the bin/magento indexer:reset command to reset the state of the price indexer and then run bin/magento indexer:reindex to reindex it.

: https://devdocs.magento.com/guides/v2.4/extension-dev-guide/indexing.html : https://devdocs.magento.com/guides/v2.4/config-guide/cli/config-cli-subcommands-index.html