Go back to M70-201 - Magento Certified Developer Plus Exam

Question :-

The value of the config/placeholders/ [placeholder_id] /block node from the merged cache.xml configuration is used______________.
only as a human-readable attribute to the placeholder tags in full page cache records
to fetch the cache lifetime for the full page cache entry from the correct block instance
to build the unique cache id for full page cache records
to map a block instance to the corresponding placeholder configuration while saving a full page cache entry

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