Which of the following statements are true regarding N-tier architecture? (Choose two.)
A.
Each layer must be able to exist on a physically independent system.
B.
The N-tier architecture must have at least one logical layer.
C.
Each layer should exchange information only with the layers above and below it.
D.
When a layer is changed or updated,the other layers must also be recompiled or modified.
A and B is the Ans.