Content Management System (CMS) Question:

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Why we used child theme in CMS?

CMS Interview Question
CMS Interview Question

Answer:

Child themes are often used when you want to customize or tweak an existing WordPress theme without losing the ability to upgrade that theme.
Advantage is child theme is Safe Updates,Easy to Extend,Fallback Safe.

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Explain child theme?Can you please explain the difference between Posts vs. Pages?