Japanese speakers please.How do you say"What is your name?"could it be written in hiragana or katakana please?thank you.?

名を名乗れ(なをなのれ）：when a samurai was attacked by anonymous assailant

お名前は（おなまえは）：when a teacher of kindergarten ask the name of a child

あんた、だれ：super casual

In hiragana, yes. Katakana is only used for writing foreign language words, loan words, and to represent onomatopoeia.

'What's your name?' : あなたのお名前は何ですか？ ("Anata no o-namae wa nan desu ka?"), お名前はなんですか? ("O-namae wa nan desu ka?"), (informal) お名前は何？ ("O-namae wa?") (literally: "Your name is ... ?")

super polite:しつれいですが、おなまえをうかがえますか？

polite: おなまえをおしえてください。

casual: なまえをおしえて。

The answer of "." is not wrong in terms of word-to-word translation, but unnatural.