N5 — outside your level filter
Is said whole, with nothing composed onto it and takes no だ／です, so there are no forms to conjugate.
何ですか
nandesukayes? (answering a call)N5expression
Example sentences2
田中さん！—はい、何ですか。
tanaka-san! — hai, nan desu ka.
Tanaka-san! — Yes, what is it? neutral
はい、何ですか、御用でしょうか。
hai, nan desu ka, goyou deshou ka.
Yes, what is it? How may I help you? formal