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Sorry!For this module there is no Sample Code.
Sorry!For this module there is no Assignments.
Question No: 1 of 9
Which of the following is not a level of abstraction in a DBMS? 
Options:
  1. View Layer
  2. Physical layer
  3. Abstract layer
  4. Conceptual layer
View Answer/Explanation:
c
Explanation:
There are three levels of abstraction in a DBMS. They are the Physical layer, Conceptual layer (logical) and the View Layer

Question No: 2 of 9
Which of the following is a database model? 
Options:
  1. Network model
  2. Hierarchical Model
  3. Relational Model
  4. Entity Model
View Answer/Explanation:
d
Explanation:

Question No: 3 of 9
Which of the following is false? 
Options:
  1. A primary key is selected from composite keys
  2. A primary key can be composed of more than column
View Answer/Explanation:
a
Explanation:
A primary key is selected from candidate keys

Question No: 4 of 9
A row is synonymous to which of the following term? 
Options:
  1. Column
  2. Record
  3. Relation
  4. Field
View Answer/Explanation:
b
Explanation:

Question No: 5 of 9
Properties that describe the characteristics of entities are called? 
Options:
  1. Attributes
  2. Identifiers
  3. Relationships
View Answer/Explanation:
b
Explanation:

Question No: 6 of 9
Entities can be associated with one another in which of the following? 
Options:
  1. Attributes
  2. Relationships
  3. Identifiers
View Answer/Explanation:
c
Explanation:

Question No: 7 of 9
An entity set is a collection of? 
Options:
  1. Set of entities
  2. Collection of different entities
  3. Collection of related entities
  4. Collection of similar entities
View Answer/Explanation:
d
Explanation:

Question No: 8 of 9
Verbs used in the description of a system or business rules represent? 
Options:
  1. Entities of an ER diagram
  2. Relationships of an ER diagram
View Answer/Explanation:
b
Explanation:

Question No: 9 of 9
An ER diagram is used to represent? 
Options:
  1. Physical view of the database
  2. Conceptual view of the database
View Answer/Explanation:
b
Explanation:

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