In the binary search routine in the text, the first thing the code does is to check whether the object is not in the array. What is the test for this condition?
a) first < last
b) first == last
c) first > last
d) the test does not involve the variables first and last.
c) first > last
a) With arrays increasing sorted, while first < last, there are still a subarray where elements must be considered. b) when the first == last there is still one element that must be examined, so this also is the test for the target not being in the array. d) is nonsense.
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