State and describe the four fundamental characteristics of a sine wave.
What will be an ideal response?
There are four important characteristics of signals that relate to sine waves:
? Frequency: the number of oscillations per unit time (usually seconds)
? Amplitude: the difference between the maximum and minimum signal heights
? Phase: how far the start of the sine wave is shifted from a reference time
? Wavelength: the length of a cycle as a signal propagates across a medium
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private fields of a superclass can be accessed in a subclass
a. by calling private methods declared in the superclass. b. by calling public or protected methods declared in the superclass. c. directly. d. All of the above.
What will be matched by the following ed regular expressions? (Tip: If you're using them in other contexts, you should omit the backslashes
* [0-9]\{3\} xx* [0-9]\{3,5\} x\{5,\} ^\... x\{10\} [A-Za-z_][A-Za-z_0-9]* [0-9]* ^Begin$ [0-9][0-9][0-9] ^\(.\).*\1$
Which of the following agents is called upon when directing a message to a specific user in a mail server?
a. Mail user agent b. Mail transport agent c. Mail delivery agent d. Application interface agent
Detection and identification rate isthe rate at which individuals in a database are properly identified in a closed-set identification application.
Answer the following statement true (T) or false (F)