Q59

A software engineer is required to implement two sets of algorithms for a single set of matrix operations in an object oriented programming language; the two sets of algo­rithms are to provide precisions of 10-3 and 10-6, respectively. She decides to implement two classes, Low Precision Matrix and High Precision Matrix, providing precisions 10-3 and 10-6 respectively. Which one of the following is the best alternative for the imple­mentation? S1: The two classes should be kept independent. S2: Low Precision Matrix should be derived from High Precision Matrix. S3: High Precision Matrix should be derived from Low Precision Matrix. S4: One class should be derived from the other; the hierarchy is immaterial.