Section 1
1. On an ER diagram which symbol identifies an attribute as part of a unique identifier. Mark for Review
(1) Points
# (*)
*
o
x
2. Entity names are always plural. True or False? Mark for Review
(1) Points
True
False (*)
3. Which symbol is used to indicate that a particular attribute is optional? Mark for Review
(1) Points
*
o (*)
#
&
4. Entity boxes are drawn as Mark for Review
(1) Points
Soft Boxes (*)
Hard Boxes
Bold Circles
Normal Circles
5. Attributes are written inside the entity to which they belong. True or False? Mark for Review
(1) Points
True (*)
False
6. Consider the recommended drawing conventions for ERD's. Indicate which of the following accurately describes diagramming conventions for entities and attributes: Mark for Review
(1) Points
The * means that an attribute is optional and entity names should be plural verbs
The 'o' means that the attribute is optional and entity names should be plural verbs
The * means that an attribute is mandatory or required and the entity name should be singular (*)
The 'o' means that the attribute is mandatory or required and the entity name should be a singular noun
