What is the french expression for am i to as in what would know?

The French expression that translates to "am I to" in the context of "what would know" is:

"Est-ce que je dois…" or "Dois-je…"

Examples:

* Est-ce que je dois savoir ça? (Am I to know that?)

* Dois-je comprendre que...? (Am I to understand that...?)

These expressions convey the idea of obligation or expectation, asking if the speaker is supposed to understand or know something.