DBMS Keys Quiz 3

DBMS Keys Quiz 3

University

20 Qs

quiz-placeholder

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DBMS Keys Quiz 3

DBMS Keys Quiz 3

Assessment

Quiz

Computers

University

Practice Problem

Hard

Created by

Nikhil govil

Used 285+ times

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The primary key of a weak entity needs to be formed. It is known as the:

Discriminator or partial key

Foreign Key

Weak Key

Strong Key

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A _____ is a property of the entire relation, rather than of the individual tuples in which each tuple is unique.

Rows

Key

Attribute

Field

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The subset of a super key is a candidate key under what condition?

No proper subset is a super key

All subsets are super keys

Subset is a super key

Each subset is a super key

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which one of the following is a set of one or more attributes taken collectively to uniquely identify a record?

Candidate key

Sub key

Super key

Foreign key

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which one of the following cannot be taken as a primary key?

Id

Register number

Dept_id

Street

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An attribute in a relation is a foreign key if the _______ key from one relation is used as an attribute in that relation.

Candidate

Primary

Super

Sub

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The relation with the attribute which is the primary key is referenced in another relation. The relation which has the attribute as a primary key is called

Referential relation

Referencing relation

Referenced relation

Referred relation

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