In the Petri net above, how many steps does it take at least until the maximum possible number of tokens are at the place "Reading"? 

In the Petri net above, how many tokens can be in the place "Reading" simultaneously?

An objective in the supermarket checkout system is to calculate the correct total. One risk that decreases satisfaction is the calculation with prices that differ from those marked at the shelves. Possible consequences of this risk are

• the supermarket loses money
• customers are dissatisfied
• supermarket employees have to invest work in receiving the customer complaint

Which risk reduction tactic would be the most likely to produce the countermeasure

"Prices are regularly scanned from on-shelf price tags and compared with in-system price information for the item."

Which layer would be the most suitable to be responsible for 

"The supermarket checkout application must internally represent an item for sale in the supermarket with its price, product code, description, ..."

The state chart allows a terminating scenario in which a patient feeling ill does not go to the doctor.

An objective in the supermarket checkout system is to calculate the correct total. One risk that decreases satisfaction is the calculation with prices that differ from those marked at the shelves. Possible consequences of this risk are

• the supermarket loses money
• customers are dissatisfied
• supermarket employees have to invest work in receiving the customer complaint

Which risk reduction tactic would be the most likely to produce the countermeasure

"Prices must not change during shop hours, on-shelf price displays are electronic and connected to supermarket system displaying same price as cash register uses for calculations."

Which layer would be the most suitable to be responsible for 

"The system must provide a notification service through email with which the supermarket can communicate to a customer  (send customer's receipt electronically, inform about specials, ...)."

Which layer would be the most suitable to be responsible for 

"The system shall request user credentials to establish a session that will be considered active unless it is explicitly terminated or there is inaction for 30 minutes."

Pick the best choice for the following statement

"Students must get at least a score of 65 to pass."

In the Petri net above, how many tokens can be in the place "Writing" simultaneously?