Quote
) Should one always respond with a 4 card major in preference to a 7 card minor, headed by the AQ?
Question 1) Simple question; simple answer. Assuming standard bidding, No.
Your bidding as responder depends on the strength of your hand. Generally speaking, responder's hand can be grouped in 3 categories: 1) Game forcing 2) Invitational strength 3) Weak.
Your bidding will depend on which strength you hold: Here are 3 hands with 4/7 hearts/diamonds to show you the difference (Forget Walsh for the moment - this is just plain old standard.) in responses when partner opens 1C.
xx, xxxx, AQxxxxx, x: Bid 1D then 2D. This shows weakness.
xx, KJxx, AQxxxxx, x: Bid 1D then 3D*. This shows invitational strength.
Ax, AJxx, AQxxxxx, x: Bid 1D then 2H. This shows game strength with longer diamonds than hearts.
*Hearts can wait. Better to show your relative stregnth first. If partner cannot bid 1H over 1D, you don't have a heart fit.
Question 2: 98762, AQJx. Answer: In standard 1S always. Otherwise you can never uncover the 5/3 fit. Keep the object in mind about majors - your first priority is to find an 8-card or better fit.
Hope this helps.
WinstonM