何するか

what to do

→ 何
phrase Rare #24,913
what to do Used to express an indirect question about what someone will do or what to do. The particle か marks the question.
JA: 週末に何するかまだ決めてない。
EN: I haven't decided what to do this weekend yet.

私ってさあ何するか分かんない女でしょ?

I'm the kind of woman you never know what I'm going to do, right?

— Love Letter (1995)

一人にすると何するかわかんないし

You never know what they’ll do if you leave them alone.

— Perfect Days (2023)

次の月曜は何するかもう決まったの?

Have you decided what you're going to do next Monday?

僕にも・・・何するか言わないんだ

You won't even tell me what you're going to do...

— ラ・ラ・ランド (2016)

何するか決めたの?

Have you decided what to do?