Page 200 - DCAP312_WEB_TECHNOLOGIES_II

Web Technologies-II

Notes 8. All data in the database reside in a ………………….
(a) abstract data (b) data repository
(c) dictionary (d) relational data

9. The relationship between each pair of data structures at levels next to each other is a
…………….. relationship.

(a) customer (b) client server
(c) parent-child (d) None of these
10. A relation is a …………………….. table of data observing relational rules.

(a) two-dimensional (b) single-dimensional
(c) multi-dimensional (d) None of these
11. The relational model establishes relationships between data structures by means of
…………….. and not by physical pointers.
(a) primary keys (b) foreign keys

(c) derived key (d) secondary key
12. Each fragment of data at every location may be managed with the ……..type of database
management system.

(a) same (b) different
(c) all (d) related

13. To finish with the precisions, a class can be ……………….
(a) subclassResponsibility (b) aMethodDeclaredAbstract
(c) method (d) abstract
14. The XForm document maintains the design and the logic of the form as a standard relatin
between ………….. and Development phase.
(a) Design (b) Documentation

(c) Testing (d) Maintenance
15. The parser receives form's declarative definition in …………. format and then regenerates
the user interface.

(a) XForms (b) Web Services
(c) XSL files and XSLT files (d) Database

9.8 Summary

• A data model represents the data requirements of an organization. You can diagrammatically
show a data model with symbols and figures.

• All data in the database reside in a data repository.
• The data repository contains the actual data.
• The database approach provides for data abstraction.
• Hierarchy model should show that an assembly contains subassemblies, a subassembly
contains parts, and a part contains subparts. Immediately you can observe that this

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