Question for January 16, 2016
What is the difference between an undefined variable and a null variable?
A
An undefined variable is equal to 0 while a null variable is equal to 1.
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B
An undefined variable has not been initialized while a null variable has.
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C
An undefined variable has a value of TRUE while a null variable is FALSE.
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D
An undefined variable is an integer while a null variable is a string.
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Correct!
Incorrect!
View the Null definition.
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