Practice Managing Databases With Oracle Multiple Choice Questions Quiz-2 - MCQGeeks.com

Q.1

Oracle directly supports the definition of surrogate keys.

True
False

Q.2

Oracle maintains a System Change Number (SCN) which is a database-wide value that is incremented by Oracle whenever database changes are made.

True
False

Q.3

An Oracle System Change Number (SCN):

is a value that is incremented whenever a dirty read occurs.
is incremented whenever a deadlock occurs.
is a value that keeps track of explicit locks.
is a value that is incremented whenever database changes are made.

Q.4

To obtain the structure of an Oracle table, the command to use is:

STRUCTURE [TableName].
DESCRIBE [TableName].
DESCRIBE STRUCTURE [TableName].
DESC TABLE [TableName].

Q.5

To see the contents of the SQL*Plus buffer, type:

CONTENTS
BUFFER
CURRENT
LIST

Q.6

Of the three ways to create an Oracle database, which one is the easiest and most recommended?

Using the Oracle Database Configuration Assistant.
Using the Oracle-supplied database creation procedures.
Using the SQL CREATE DATABASE command.
None of the above is correct.

Q.7

What Oracle backup and recover file contains user and system data?

Control file
Datafile
OnLine ReDo file
Offline ReDo file

Q.8

When using SQL*Plus, Oracle commands, column names, table names and all other database elements:

are case insensitive.
are case sensitive.
must always be in lower case.
must always be in upper case.

Q.9

Which SQL phrase is not supported by Oracle?

ON DELETE CASCADE
ON UPDATE CASCADE
CREATE SEQUENCE [SequenceName]
DROP SEQUENCE [SequenceName]

Q.10

What is the type of Oracle backup in which all uncommitted changes have been removed from the datafiles?

Full backup
Consistent backup
Inconsistent backup
Differential backup

Q.11

Which of the following is not true of SQL views?

Oracle views cannot use the ORDER BY clause in view definitions.
Oracle views are created using the standard SQL-92 CREATE VIEW command.
Oracle views can by queried.
The SQL-92 standard does not allow the use of the ORDER BY clause in view definitions.

Q.12

SQL*Plus will finish the statement and execute it when the user types in this:

A left slash ( ) followed by [Enter].
A colon ( : ) followed by [Enter].
A semicolon ( ; ) followed by [Enter].
A period ( . ) followed by [Enter].

Q.13

Which of the following is NOT an Oracle-supported trigger?

BEFORE
DURING
AFTER
INSTEAD OF

Q.14

After a table has been created, its structure can be modified using the SQL command:

UPDATE TABLE [TableName].
MODIFY TABLE [TableName].
ALTER TABLE [TableName].
CHANGE TABLE [TableName].

Q.15

Which of the following is not true about modifying table columns?

You can drop a column at any time.
You can add a column at any time as long as it is a NULL column.
You can increase the number of characters in character columns or the number of digits in numeric columns
You cannot increase or decrease the number of decimal places.

Q.16

You have linked SQLPlus to an external text editor. To invoke the text editor for use within SQLPlus, which command do you use?

Open [FileName]
Show [FileName]
Alter [FileName]
Edit [FileName]

Q.17

Which of the following is not true of SQL views?

Oracle views cannot use the ORDER BY clause in view definitions.
Oracle views are created using the standard SQL-92 CREATE VIEW command.
Oracle views can by queried.
The SQL-92 standard does not allow the use of the ORDER BY clause in view definitions.

Q.18

Of the three ways to create an Oracle database, which one is the easiest and most recommended?

Using the Oracle Database Configuration Assistant.
Using the Oracle-supplied database creation procedures.
Using the SQL CREATE DATABASE command.
None of the above is correct.

Q.19

What type of failure occurs when Oracle fails due to an operating system or computer hardware failure?

Application failure
Instance Failure
Media Failure
Rollback failure

Q.20

The default extension for an Oracle SQL*Plus file is:

.txt.
.pls.
.ora.
.sql.

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