On which port does FTP run by default?
A) 63
B) 89
C) 21
D) 25
C) 21
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The pointer to the first element in a linked list
a) can be used to traverse the list b) can be modified in any way necessary c) should only be modified by the code that adds nodes to the list and deletes nodes from the list d) is optional e) is inefficient
Every Web site should include a navigation list, which is a list containing links to the main topic areas of the site.
Answer the following statement true (T) or false (F)
In the previous chapter, Self-Test Question 16 described a class Person to represent a person. The class has instance variables for a person’s name, which is a string, and an integer age. These variables are name and age, respectively.
a. Write a default constructor for Person that sets name to the string "No name yet" and age to zero. b. Write a second constructor for Person that sets name to a given string and age to a given age. c. Write a static method createAdult() for Person that returns a special instance of this class. The instance represents a generic adult and has the name “An adult” and the age 21.
Create a use case diagram for one of the use cases.
What will be an ideal response?