Primary key is selected from the:
ACandidate keys
BComposite keys
CDeterminants
DForeign keys
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Capability of computer to perform more than one tasks at the same time is:
Pick out the unary operator from the following :
A typical CPU contains and FPU and what other processing unit?
An unauthorized program which functions from inside what seems to be an authorized program, thereby concealing what it is actually doing: