Defense - Opening Leads vs Suit Contracts

[@archie6945]

I heard that the partnership could have an agreement, with AK, depending on which is led, it sends a message; e.g. from AK doubleton.

[@archie6945]

In case 2, where partner leads the 2♠ and you have ♠KJ6...isn't it likely that the lead signifies partner has the Q♠& is leading fourth highest from an honour: you know where the other honours are?