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A sparse index and a dense index are the same thing.Selected Answer:[pic 1] FalseCorrect Answer:[pic 2] FalseQuestion 21 out of 1 pointsThe file system uses the disk management subsystem.Selected Answer:[pic 3] TrueCorrect Answer:[pic 4] TrueQuestion 31 out of 1 pointsEven though main memory is faster that secondary storage, its volatility makes it less suitable for database storageSelected Answer:[pic 5] TrueCorrect.