Questions & Answers about Какой урок тебе нравится?
Какой is an interrogative adjective meaning roughly which / what kind of.
In this sentence it is:
- masculine
- singular
- nominative case
It has to agree with урок (lesson), which is a masculine, singular noun in the nominative case. So you get:
- какой урок – which lesson
- какая книга – which book (feminine)
- какое слово – which word (neuter)
- какие уроки – which lessons (plural)
So the form какой is chosen purely because it matches урок in gender, number, and case.
Урок is in the nominative case and functions as the grammatical subject of the sentence.
With the verb нравиться, Russian does something that feels “reversed” for English speakers:
- The thing that is liked → nominative (subject)
- The person who likes it → dative (indirect object)
So in Какой урок тебе нравится?:
- урок (lesson) is what “is pleasing” → subject in nominative
- тебе (to you) is the experiencer → dative
Literally the structure is closer to: Which lesson is pleasing to you?