AD0-E717 Exam Dumps : Adobe Commerce Developer Professional

The customer data JS library is used to store private customer data in local storage. This data can be used to improve the customer's experience on the store, such as by remembering their shipping address or their preferred payment method.

The customer data JS library in Adobe Commerce is used for managing customer data on the client side, such as the shopping cart, comparison list, and wishlist. It does not store sensitive information like credit card details or usernames and passwords. Instead, it utilizes local storage to keep a private data section where customer-specific data is stored securely and accessed via JavaScript, making option B correct.

The access.log file stores the information about the requests and responses that occur on the web server, such as the IP address, timestamp, request URI, response code, and referer URL1. By checking the access.log file, a developer can identify the requests that resulted in 503 errors and the possible causes of those errors, such as traffic spikes, insufficient server resources, or misconfiguration1.

To check the access.log file on an Adobe Commerce Cloud project, a developer can use the following command in the CLI:

grep -r "\" 50 [0-9]" /path/to/access.log

This command will search for any lines in the access.log file that contain a response code starting with 50, which indicates a server error1. The developer can then compare the timestamps of those lines with the exception.log and error.log files to find more details about the errors1.

Alternatively, if the error has occurred in the past and the access.log file has been rotated (compressed and archived), the developer can use the following command in the CLI (Pro architecture only):

zgrep "\" 50 [0-9]" /path/to/access.log..gz

This command will search for any lines in the compressed access.log file that contain a response code starting with 501. The rotation ID is a number that indicates how many times the log file has been rotated. For example, access.log.1.gz is the most recent rotated log file, and access.log.10.gz is the oldest rotated log file1.

When renaming a table in Magento, to prevent data loss, the developer must define the table and its columns mapping in thedb_schema_whitelist.jsonfile. This declarative schema approach ensures that the data migration tool knows about the changes and can migrate data from the old table to the newly named table without losing any data.