System Analysis and Design
Sequential or series testing is

is checking the logic of one or more programs in the candidate system
testing changes made in an existing or a new program
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
A couple:

is represented by a line joining two modules
None of these
is a data item that moves from one module to another
means that the upper module has the capability of calling the lower module
None of these

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