List of top Computer Science & Information Technology Questions on Propositional Logic

In propositional logic \( P ↔ Q \) is equivalent to \( \sim \) (denotes NOT) _______.
Which of the following is a tautology?
If $ P $ is false, then what is the value of the proposition $ (P \rightarrow Q) \rightarrow R $?
The proposition $ \neg P \cup Q $ is equivalent to which of the following?