A chart type useful for illustrating comparisons among related numbers is called:
A) A column chart B) A pie chart C) An area chart
A
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Answer the following questions true (T) or false (F)
1. You may omit the else part of an if-else statement if no alternative action is required. 2. In a switch statement, the choice of which branch to execute is determined by an expression given in parentheses after the keyword switch.
Office 2013 is the name of the perpetual _________________________ that includes individual applications that can be installed on a single computer.
Fill in the blank(s) with the appropriate word(s).
Write the flow of events and specify all fields for the use case UpdateTariff that you drew in Exercise 2–4. Do not forget to specify any relationships.
Figure 2-2 depicts a possible solution for this exercise. Use case name UpdateTariff Participating actor Initiated by CentralComputerSystem Flow of events 1. The CentralComputerSystem activates the “UpdateTariff” function of the ticket distributors available on the network. 2. The ticket distributor disables the traveler interface and posts a sign indicating that the ticket distributor is under maintenance. 3. The ticket distributor waits for the new database from the CentralComputerSystem. 4. After waiting a minute for the ticket distributors to reach a waiting state, the CentralComputerSystem broadcasts the new database. 5. The ticket distributor system receives the new database of tariff. Upon complete, the ticket distributor sends an acknowledgement to the CentralComputerSystem. 6. After acknowledgment, the ticket distributor enables the traveler interface and can issue tickets at the new tariff. 7. The CentralComputerSystem checks if all ticket distributors have acknowledged the new database. If not, the CentralComputerSystem invokes the CheckNonRespondingDistributors use case. Entry condition • The ticket distributor is connected to a network reachable by the CentralComputerSystem. Exit condition • The ticket distributor can issue tickets under the new tariff, OR • The ticket distributor is disabled and displays a sign denoting that it is under maintenance. Quality requirements • The ticket distributor stays offline at most 2 minutes and is considered out-of-order otherwise.
____________________ is the process of verifying someone's identity by checking his or her username and password against a central user database.
Fill in the blank(s) with the appropriate word(s).