System Analysis and Design
A hierarchical chart that divides a large program into modules, in which greater details is designed in successively lower programming levels, is called a

None of these
All of these
Scheme
sub-schema
Structure

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System Analysis and Design
A menu-driven system

None of these
can be used only by computer professionals
presents options and allows the user to make selections
increases the operator's work
is required only for on-line systems

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System Analysis and Design
Direct-access organization

Stores records sequentially but uses an index to locate records
means storing records in contiguous blocks according to a key.
uses an index for each key type
has records placed randomly throughout the file

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