What is ZRS in Azure

zone redundant storage- here data while will copied to 3 different zones in a single region. Total there will be 3 copies

What is plociy assignments in Azure?

Policy are set of rules assigned to maintain a company standars.
eg Allowed location - this policy will let u create a service only in a specific region.

What is the difference between read only and delete lock in Resource Group

Read only lock will prevent deletion as well as modification,
delete lock - only prevents deletion

what is storage explorer usage in Azure?

How many types of storage in Azure