Derive a class BuyNItemsGetOneFree from DiscountPolicy, as described in Exercise 10. The class should have a constructor that has a single parameter n. In addition, the class should define the method computeDiscount so that every nth item is free. For example, the following table gives the discount for the purchase of various counts of an item that costs $10, when n is 3:
What will be an ideal response?
See the code in BuyNItemsGetOneFree.java.
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un the kill -l command on your system to display all the signals that your system supports along with their numbers. What are the numbers for the following signals: SIGCHLD and SIGSEGV? When are these signals generated?
The following session shows that our Red Hat 7.0 system supports 63 signals. The numbers for SIGCHLD and SIGSEGV are 17 and 11, respectively. The SIGCHLD signal is sent to a process when any of its children processes terminates. The SIGSEGV signal is sent to a processes when it causes a segmentation fault, i.e., it tries to access an illegal memory location.
Answer the following statements true (T) or false (F)
1. The redirection parameter > changes or overrides the standard UNIX system output device. 2. A pipe accepts data from the standard input device, modifies them in some way, and sends the output to the standard output device. 3. A filter causes one utility’s standard output to be used as another utility’s standard input. 4. A shell script is a file that consists of a series of commands. 5. A GUI is easier to use (than line commands) because it presents a visual picture of the available options, but communicating through a GUI is relatively inefficient because the commands must be processed by an extra layer.
A hoax that is intended to trick someone out of their money is called ________
Fill in the blank(s) with correct word
The Caption property is used to give a name to fields used on forms and reports
Indicate whether the statement is true or false