31. What is Data Storage - Definition Language? The storage
structures and access methods used by database system are
specified by a set of definition in a special type of DDL called
data storage-definition language. 32. What is DML (Data
Manipulation Language)? This language that enable user to access
or manipulate data as organised by appropriate data model. 33.
What is DML Compiler? It translates DML statements in a query
language into low-level instruction that the query evaluation
engine can understand. 34. What is Query evaluation engine? It
executes low-level instruction generated by compiler. 35. What
is DDL Interpreter? It interprets DDL statements and record them
in tables containing metadata. 36. What is Record-at-a-time? The
Low level or Procedural DML can specify and retrieve each record
from a set of records. This retrieve of a record is said to be
Record-at-a-time.