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Introduction to Database System

Introduction to Database System
In SQL, which of the following is not a data Manipulation Language Commands?

UPDATE
DELETE
CREATE
SELECT

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Introduction to Database System
In SQL, which command is used to make permanent changes made by statements issue since the beginning of a transaction?

ZIP
COMMIT
PACK
SAVE

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Introduction to Database System
A large computer information system maintains many different computer files. Which amongst them is called a perpetual file?

Log file
Master file
Specialized file
Update file

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Introduction to Database System
A list consists of last names, first names, addresses, and pin codes if all people in the list have the same last and the same pin code, a useful key would be

a compound key consisting of the first name and the last name
All of these
None of these
the pin code
the last name

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Introduction to Database System
An ID-dependent entity is an entity whose identifier is a composite identifier where no portion of the composite identifier is an identifier of another entity.

True
False

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Introduction to Database System
Which of the following is a serious problem of file management systems?

All of these
data redundancy
lack of data independence
difficult to update
program dependence

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