System Analysis and Design
Backup and recovery procedures are primarily implemented to

All of these
to show different versions of data and programs
handle the contingency when a file gets corrupted
to provide data redundancy
None of these

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System Analysis and Design
Acceptance testing is

testing changes made in an existing or a new program
is checking the logic of one or more programs in the candidate systems
making sure that the new programs do in fact process certain transactions according to Specifications
running the system with line data by the actual user

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System Analysis and Design
Sequential or series testing is

making sure that the new programs do in fact process certain transactions according to Specifications
is checking the logic of one or more programs in the candidate system
running the system with line data by the actual user
testing changes made in an existing or a new program

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