System Analysis and Design
Direct-access organization

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

ANSWER DOWNLOAD EXAMIANS APP

System Analysis and Design
The black-box concept:

assumes that the black box is independent
is invoked by describing a system in terms of inputs and outputs, leaving the transformation process a black box.
All of these
assumes that inputs and outputs will remain stable
None of these

ANSWER DOWNLOAD EXAMIANS APP