I may be confused regarding sub delegated zone

[Blason R]

Hello friends,

I may sound like novice but have basic question regarding Sub-zone which is
an delegated zone. lets say I have zone example.com whose NS are
ns1.example.com and then I have delegated sub-zone subdom.example.com whose
ns record would be say ns2.example.com.

So people who will be querying to A record for subdom.example.com [which @]
will first be forwarded to ns1.example.com and then from there ns record of
subdom.example.com will be given?

Or will it directly be forwarded to n2.example.com?
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