A class becomes abstract when you place the __________ key word in the class definition.
a. super b. extends c. final d. abstract
d. abstract
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If an object has a natural ____ representation, it is a good idea to build it within a toString() method.
A. Double B. Boolean C. String D. Integer
Alice lets us build programs consisting of statements, in which we often send messages to ____.
A. functions B. objects C. classes D. methods
What is the SQL statement required to delete the age column from the Student table discussed earlier in the chapter?
What will be an ideal response?
A distributed WLAN architecture can be described as which of the following?
A. a BSS composed of two or more ESS networks B. an ESS that uses multiple autonomous access points C. an IBSS that uses a single centrally managed fat AP D. multiple ad-hoc networks combined to form one large network