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Database participation 2

Authored by Bassant Reda

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University

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Database participation 2
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12 questions

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1.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Weak entity set is represented as

Underline

Double line

Double diamond

Double rectangle

2.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Double oval represents----------

Derived Attribute

Multi-valued Attribute

Composite Attribute

Simple Attribute

3.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Dashed oval represents----------

Derived Attribute

Multi-valued Attribute

Composite Attribute

Simple Attribute

4.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Which is the subset of SQL commands used to manipulate Database structures?

Data Definition Language(DDL)

Data Manipulation Language(DML)

Data Control Language(DCL)

DML and DDL

5.

MULTIPLE SELECT QUESTION

20 sec • 1 pt

Which of the following is/are the DDL statements?

Create

Drop

Alter

Update

6.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Command that is used to add attributes to an existing relation, is said to be

Update

Alter

Modify

Change

7.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

A PRIMARY KEY allows a single row to contain NULL

True

False

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