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Que. Which level of Abstraction describes how data are stored in the data base ? 
a. Physical level
b. View level
c. Abstraction level
d. Logical level
Answer:Physical level
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Similar Questions:

Consider the relation schema R = (A,B,C,D,E,F) on which the following functional dependencies hold:

A → B
B, C → D
E → C
D → A

What are the candidate keys of R?
A primary key for an entity is:
Consider a “CUSTOMERS” database table having a column “CITY” filled with all the names of Indian cities (in capital letters). The SQL statement that finds all cities that have “GAR” somewhere in its name, is:
Consider the following relational schemas for a library database: 
Book (Title, Author, Catalog_no, Publisher, Year, Price) 
Collection (Title, Author, with the following dependencies :

I. Title, Author —> Catalog_no
II. Catalog_no —> Title, Author, Publisher, Year
III. Publisher, Title, Year —> Price
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A superkey for an entity consists of:
Relations produced from E - R Model will always be in ..............
Which of the following statements concerning Object-Oriented databases is FALSE?
Given two relations R1(A, B) and R2(C, D), the result of following query
Select distinct A, B from R1, R2
is guaranteed to be same as R1 provided one of the following condition is satisfied.
Given a Relation POSITION (Posting-No, Skill), then query to retrieve all distinct pairs of posting-nos requiring skill is
Let pk(R) denotes primary key of relation R. A many-to-one relationship that exists between two relations R1 and R2 can be expressed as follows:
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