Quiz 3

Quiz 3

University

15 Qs

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Quiz 3

Quiz 3

Assessment

Quiz

Other

University

Practice Problem

Easy

Created by

Maryam Ahmad

Used 4+ times

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15 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the primary purpose of normalization in databases?

Improve execution speed

Increase redundancy

Eliminate update anomalies

Avoid using foreign keys

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which normal form removes partial dependencies?

First Normal Form (1NF)

Second Normal Form (2NF)

Third Normal Form (3NF)

Boyce-Codd Normal Form (BCNF)

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In functional dependency A → B, which of the following is true?

A determines nothing

A determines B

B determines A

A is always a foreign key

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which operation in relational algebra selects specific rows based on a condition?

SELECT (σ)

PROJECT (π)

JOIN (⋈)

UNION (∪)

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Which of the following is a valid PROJECT operation?

σDNO=4(EMPLOYEE)

πLNAME, SALARY(EMPLOYEE)

EMPLOYEE × DEPARTMENT

  1. EMPLOYEE − WORKS_ON

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which type of JOIN includes only matching tuples based on a condition?

Left outer join

Equijoin

Natural join

Cartesian product

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What SQL command is used to give privileges to users?

AUTHORIZE

PERMIT

GRANT

ALLOCATE

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