if you want to emphasize that he has only ONE children, yes. otherwise it is reduntant.
There is no difference between "Has got" and "has" so "He has the children" must be considered correct.
That is not correct. There is a difference between "he has children" and "he has the children." This sentence is the former. The latter would be "çocuklar onda/onunla"
Why is the answer in plural (kids), when there is çocuk in the question? çocuklar is plural, or I got it wrong?
The answer is singular "He is a child." However, it can be understood as plural to some people...this example is not the norm though :)
who says there is not plural?
then it would be "onun çocukları var". the object in the sentence above is singular, not plural.
"He has children" was accepted. If "onun çocuğu var" was said, is it assumed children (plural), or child (singular)
Possessive suffixes follow 4-way vowel harmony and consonant harmony of Accusative lesson