System Analysis and Design
Back-up procedure helps in

restoring the operation whenever there is a disk failure
none of the listed here
all of the listed here
restoring the data files whenever there is a system crash

ANSWER DOWNLOAD EXAMIANS APP

System Analysis and Design
Direct-access organization

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

ANSWER DOWNLOAD EXAMIANS APP