System Analysis and Design
An indexed file offers the facility of a Random file and the access method of a

indexed file
direct access file
random access file
None of these
Sequential file

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System Analysis and Design
System prototyping helps the designer in

communicating to the user, quickly, how the system, when developed, will look like and get a feedback.
making the programmers understand how the system will function.
giving a demo of the software, to the system manager to whom he reports
all of the listed here

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System Analysis and Design
Positive testing is

running the system with line data by the actual user
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
is checking the logic of one or more programs in the candidate system

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