1. N deals, opens 1N (12-14), you double, S bids 2♥ natural ending the auction. Partner leads J♦ showing the 10 or singleton/doubleton, this goes K A 3, what do you do at trick 2 ?
2. The auction on this board is complete nonsense, you deal and open 2♦-(X)-3♦-(3N) but suffice it to say that you've shown 4 or more diamonds and 0-10 points, partner has shown any hand with 5 diamonds or a weak no trump type hand with 4 diamonds, and declarer having had to guess, may not have as much strength as he would like when he sees dummy.
You lead the 2♦ - Q - A - 7, partner returns the 3♦ (showing exactly 4 to start with) - 10 - J - 2♠, what do you do at trick 3 ?