The key to a cost effective data input operation is:
OCR equipment
validity checks
validation
employee motivation
A good query system:
can accept English language commands
allows non programmers to access information stored in a database
can be accessed only by data processing professionals
both (a) and (b)
The function of a database is _______.
to check all the input data
to check all the spellings
to collect and organize input data
to output data
A schema describes:
data elements
record and file
record and relationships
all of the above
The distingushable part of a record are called:
files
data
fields
formats
The files stored in a secondary storage device are composed of a hirarchy of data. What does a record in a file contain?
bits
characters
data field
schema
