Database MCQ

ER-model & Relational Model Database design File Structures Query languages SQL Transactions and concurrency control

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Database MCQ - ER-model & Relational Model

16:

Data independence means

A.	Data is defined separately and not included in programs
B.	Programs are not dependent on the physical attributes of data.
C.	Programs are not dependent on the logical attributes of data
D.	Both (B) and (C).
	Answer Report Discuss
	Option: D Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

17:

E-R model uses this symbol to represent weak entity set ?

A.	Dotted rectangle
B.	Diamond
C.	Doubly outlined rectangle
D.	None of these
	Answer Report Discuss
	Option: C Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

18:

SET concept is used in :

A.	Network Model
B.	Hierarchical Model
C.	Relational Model
D.	None of these
	Answer Report Discuss
	Option: A Explanation : Click on Discuss to view users comments. Abhishek singh said: (5:32pm on Wednesday 23rd November 2016) In network database terminology, a relationship is a set. Each set is made up of at least two types of records: an owner record (equivalent to parent in the hierarchical model) and a member record (similar to the child record in the hierarchical model). Write your comments here: Updating your Comments.. Updating your Comments..

19:

Relational Algebra is

A.	Data Definition Language
B.	Meta Language
C.	Procedural query Language
D.	None of the above
	Answer Report Discuss
	Option: C Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

20:

Key to represent relationship between tables is called

A.	Primary key
B.	Secondary Key
C.	Foreign Key
D.	None of these
	Answer Report Discuss
	Option: C Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

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