lvl. 1 Chapter 2 Relational Model (QB)

lvl. 1 Chapter 2 Relational Model (QB)

University

30 Qs

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lvl. 1 Chapter 2 Relational Model (QB)

lvl. 1 Chapter 2 Relational Model (QB)

Assessment

Quiz

Computers

University

Practice Problem

Easy

Created by

Riddhish Thakore

Used 6+ times

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30 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The number of tuples in a relation is known as

degree
relation
attribute
cardinality

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following aspects of data is the concern of a relational database model?

data manipulation
data integrity
data structure
all of these

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A relational database consists of a collection of

Tables
Fields
Records
Keys

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following is used to denote the selection operation in relational algebra?

Pi (Greek)
Sigma (Greek)
Lambda (Greek)
Omega (Greek)

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

For select operation the                  appear in the subscript and the                        argument appears in the paranthesis after the sigma.

Predicates, relation
Relation, Predicates
Operation, Predicates
Relation, Operation

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The                        operation, denoted by −, allows us to find tuples that are in one relation but are not in another.

Union
Set-difference
Difference
Intersection

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A Set of Possible data value is called                                              .

Attribute
Degree
Tuple
Domain

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