Exercise: Logical Database Design And The Relational Model

Questions for: Logical Database Design And The Relational Model

Relations are:
A:
two-dimensional tables.
B:
three-dimensional tables.
C:
four-dimensional tables.
D:
five-dimensional tables.
Answer: A
No answer description is available. Let's discuss.
📖
📝
💬
👁️
When mapping a supertype/subtype relationship which of the following is true?
A:
The supertype primary key is assigned to each subtype.
B:
The subtype primary key is assigned to each supertype.
C:
There is no link between the supertype/subtype entities.
D:
There is no primary key/foreign key relationship between a supertype/subtype.
Answer: A
No answer description is available. Let's discuss.
📖
📝
💬
👁️
When mapping a regular entity into a relation which of the following is true?
A:
One relation is created.
B:
Two relations are created.
C:
Three relations are created.
D:
Four relations are created.
Answer: A
No answer description is available. Let's discuss.
📖
📝
💬
👁️
When mapping a ternary relationship with an associative entity into a relation which of the following is true?
A:
One relation is created.
B:
Two relations are created.
C:
Three relations are created.
D:
Four relations are created.
Answer: D
No answer description is available. Let's discuss.
📖
📝
💬
👁️
A relation has which of the following properties?
A:
Each row is not unique.
B:
Attributes can have the same name within a given table.
C:
Each relation has a unique name.
D:
The order of the columns is significant.
Answer: C
No answer description is available. Let's discuss.
📖
📝
💬
👁️
Ad Slot (Above Pagination)
Quiz