Q1: Is it always correct that an adjective clause always and without exception placed after a subject noun or an object noun in a sentence?

Q2: What are the difference between a noun clause and an adjective clause?

Q3: Are these clauses commonly used in daily conversation?
1. Adjective clauses as far as I know occur immediately after the noun.

I'm afraid I do not know whether there are any exceptions to this.

2. She said she likes apple.

She met a man who has a mill in this town.

Noun clause is either the subject or the object of the verb.

Here in the example above it is the object of the verb 'said'.

Adjective clause as the name suggests describes the noun.

3. Yes, very much.
Thanks for answering my questions.
The answers that you gave is really helpful. I appreciate that.