The collection of information stored in the database at a particular moment is called an _______ of the database.
Instance
Schema
Subshema
None of these
The columns of a relation are referred to as _________.
tuples
attributes
records
views
The overall design of the database is called
Database schema
data abstraction
relation
data dictionary
___________ executes low level instructions generated by the DML compiler.
DML compiler
DDL interpreter
Query evaluation engine
none of these
Tables consisting of rows and columns are called
Tuples
Records
Attributes
Relations
__________ is the sole authority of the database.
Naive users
File manager
Sophisticated users
DBA
A database schema is defined by _____ language.
DCL
DML
DDL
__________ data model uses tables.
Hierachical
Network
Relational
Tables consisting of rows and colums are called __________.
__________ level of data abstraction treat data in bits and bytes.
physical level
Conceptual level
External level
View level