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VSAM files are used when we want to store data based on some key fields(Eg: KSDS) access method is indexed. NON VSAM files like PS are used when we want to store data which is not unique and also the access is sequential.
A brute force attack is defined as a trial-and-error method used to obtain information such as passwords or Personal Identification Number. Software is used to generate a large number of consecutive guesses in order to obtain this information.
The foil method in algebra is used to "multiply linear binomials."The FOIL method is used in elementary algebra as a guide for solving algebraic problems.
Simplex method used for maximization, where dual simplex used for minimization.
Column method can be used for both !