Can a defensive player stretch his arms out to impede the offensive player from driving to the hoop?

Question

Can a defensive player stretch his arms out to impede the offensive player from driving to the hoop?

Answer 1

Yes, but he must be moving also and not touch the offensive player hard or it's a foul

Answer 2

no. that would be a foul. You have to move your feet and stay in front of the player like most good defensive players. You can only touch the offensive player with a bent elbow anything outside of that and a ref is going to whistle you real quick.