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Introduction to Database System

Introduction to Database System
In SQL, which command(s) is(are) used to enable/disable all triggers on a table?

ALTER TABLE
MODIFY TRIGGERS IN TABLE
ALTER TRIGGERS
All of the listed here

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Introduction to Database System
Which of the following hardware components is the most important to the operation of a database management system?

printer
plotter
high speed, large-capacity disk
high-resolution video display

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Introduction to Database System
Composite identifiers consist of two or more attributes.

True
False

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Introduction to Database System
A relational database management (RDBM) package manages data in more than one file at once. How does it organize these file? As

both (a) and (b)
relations
tuple
tables
None of these

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Introduction to Database System
An application where only one user accesses the database at a given time is an example of a(n) ________ .

multiuser database application
single-user database application
e-commerce database application
data mining database application

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Introduction to Database System
A relation is in this form if it is in BCNF and has no multivalued dependencies:

second normal form.
third normal form.
domain/key normal form.
fourth normal form.

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