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Total 125 Questions | Updated On: Nov 19, 2024

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Question 1

Consider the following relational algebraic expression as well as the Employee and Department relations shown in the exhibit: Which of the following relations would result from the given relational algebraic expression?

A :

B :

C :

D :

Answer: D

Question 2

Which of the following best describes a composite key?

A : A composite key is a primary key that consists of the first two attributes of a relation

B : A composite key is a primary or foreign key defined by its parent keys.

C : A composite key is a foreign key that consists of the same attributes as the primary key from a related table.

D : A composite key is a primary or foreign key that consists of two or more attributes of a relation

Answer: D

Question 3

With regard to databases, what is normalization?

A : The process of reducing the cardinality of a relation

B : The process of organizing and refining relations

C : The process of duplicating data to reduce the number of tables

D : The process of limiting data stored in a table to a specific range of values

Answer: B

Question 4

Consider the following database information:

domain s_id: integer domain grd: fixed length

character string length 1

STUDENT_GRADE(

Student_Number: s_id NOT NULL -

Grade: grd ) Primary Key -

Student_Number -

During which phase of the database design process would this information be developed?

A : Logical

B : Physical

C : Conceptual

D : Implementation

Answer: A

Question 5

Which statement is used to define a named group of related tables, views, domains and other database objects?

A : CREATE

B : CREATE TABLE

C : CREATE DOMAIN

D : CREATE SCHEMA

Answer: D

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Total 125 Questions | Updated On: Nov 19, 2024

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