I need help with the second question also can you tell me if I have the right answer for question#1?

(1.)What is the difference between a perpetual inventory and a physical inventory ?

The periodic system relies upon an occasional physical count of the inventory to determine the ending inventory balance and the cost of goods sold, while the perpetual system keeps continual track of inventory balances.

(2.)If a company maintains a perpetual inventory, should its physical inventory at any date be equal to the amount indicated by the perpetual inventory records ? Why?