Database-Management-System
August 29, 2024Database-Management-System
August 29, 2024Database-models
|
Question 2
|
Which statement is false regarding data Independence :
|
Hierarchical data model suffers from data Independence.
|
|
|
Network model suffers from data Independence.
|
|
|
Relational model suffers only from logical data Independence.
|
|
|
Relational model suffers only from physical data Independence.
|
Question 2 Explanation:
TRUE: Hierarchical data model suffers from data independence
TRUE: Network model suffers from data independence
FLASE: Relational model suffers only from logical data independence.
Note: Relational model means tabular representation of the database and since tabular is in 1NF but for remaining normal forms there is some dependency problem exist not independency exist
TRUE: Relational model suffers only from physical data independence
TRUE: Network model suffers from data independence
FLASE: Relational model suffers only from logical data independence.
Note: Relational model means tabular representation of the database and since tabular is in 1NF but for remaining normal forms there is some dependency problem exist not independency exist
TRUE: Relational model suffers only from physical data independence
Correct Answer: C
Question 2 Explanation:
TRUE: Hierarchical data model suffers from data independence
TRUE: Network model suffers from data independence
FLASE: Relational model suffers only from logical data independence.
Note: Relational model means tabular representation of the database and since tabular is in 1NF but for remaining normal forms there is some dependency problem exist not independency exist
TRUE: Relational model suffers only from physical data independence
TRUE: Network model suffers from data independence
FLASE: Relational model suffers only from logical data independence.
Note: Relational model means tabular representation of the database and since tabular is in 1NF but for remaining normal forms there is some dependency problem exist not independency exist
TRUE: Relational model suffers only from physical data independence