Questions & Answers about Antep fıstığı tuzlu.
Because tuzlu here is a predicate adjective, not an attributive one. Turkish follows a Subject–Predicate order, so you say
Subject: Antep fıstığı
Predicate adjective: tuzlu
If you actually want “salty pistachio” as an adjective before the noun, you’d write tuzlu Antep fıstığı.
Tuz means “salt.” Adding the suffix -lu (one of -lı/-li/-lü, chosen by vowel harmony) turns nouns into adjectives meaning “having or full of X.”
tuz + lu → tuzlu (“salty”)
Add değil (“not”) after the adjective:
Antep fıstığı tuzlu değil.
This means “Antep pistachio is not salty.”
Attach the question particle -mu/-mü/-mi/-mu after the adjective (observe vowel harmony):
Antep fıstığı tuzlu mu?
= “Is Antep pistachio salty?”
Add the plural suffix -lar to fıstık before the possessive marker:
fıstık + -lar + -ı → fıstıkları
So you get
Antep fıstıkları tuzlu.
= “Antep pistachios are salty.”
Turkish doesn’t have a definite article (the), and the indefinite article (a/an) is expressed with bir if needed. Here, no article is used:
Antep fıstığı tuzlu.
If you wanted to say “A pistachio from Antep is salty,” you’d say
Bir Antep fıstığı tuzlu.