Keyword(s) ________ begin(s) a class declaration
a) new class
b) declare class
c) declare
d) class
d) class
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Explain howtimestamps are used to defend against a replay attack in a security protocol.
What will be an ideal response?
Consider a class Characteristic that will be used in an online dating service to assess how compatible two people are. Its attributes are
• description—a string that identifies the characteristic • rating—an integer between 1 and 10 that indicates a person’s desire for this characteristic in another person a. Write a constructor that sets the description of the characteristic to a given string and sets the rating to zero to indicate that it has not yet been determined. b. Write a private method isValid(aRating) that returns true if the given rating is valid, that is, is between 1 and 10. c. Write a method setRating(aRating) that sets the rating to aRating if it is valid. d. Write a method setRating that reads a rating from the keyboard, insisting that the rating supplied by the user be valid.
Which of the following is an activity that falls into a gray area and might be acceptable Internet use in some organizations but not others?
a. Email b. Online training c. Web meetings d. Online shopping during a break time
The operation top removes the top element of the stack.
Answer the following statement true (T) or false (F)