1. Will the cash secured put being exercise when the price drop below the strike price before expiration ? 2. After I being assigned with 100 shares, can I sell it immediately ? Thanks you 🙏

Tan has answered you the questions, just for the no.2 , normally i’ll cc instead of selling it immediately

1. Whether the put is exercised depends on the options buyer, they may sell the put options to take the profit, or if they own the shares, they can exercise and assign the shares to you.
2. Of course you can sell immediately because you now own the assigned shares.