True/False Questions for DBMS Architecute and Database Model
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1
Physical representation of the database on the computer is external level. FalseView Answer
2
External level does not concern with the way users perceive the data. FalseView Answer
3
External Schema corresponds to different views of data. TrueView Answer
4
Conceptual level is the way in which the DBMS and the operating system perceive
the data FalseView Answer
5
External level is the way that users perceive the data TrueView Answer
6
Conceptual level does not concern any storage considerations, such as
how many bytes occupied. TrueView Answer
7
Conceptual Level does not represent sematic about data FalseView Answer
8
A database instance is a set of memory structure and background processes that access a set of database files. TrueView Answer
9
Map of concepts and their relationships is represented by logical Schema. FalseView Answer
10
Physical data models are used to describe data at the highest level. FalseView Answer
11
There are three principle types of record base model. TrueView Answer
12
Logical data independence should not require changes to external schema or rewrites of application programs when user views to be updated. FalseView Answer
13
Non procedural DML is single retrieval or update statement. We don't have to explain how to retrieve the data. TrueView Answer
14
"Same data accessible to all users" is an objective of Three-Level Architecture. TrueView Answer
15
Conceptual Schema is a complete description of the internal model, including definitions of records, indexes and hashing functions. FalseView Answer
16
In data independence, upper levels are affected when changes are made in the low levels. FalseView Answer
