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Quiz for Oracle





1. How many columns are presented after executing this query:

1
2
3
0

2. What was a problem with navigational data access languages?

The user had to have knowledge of the table and index structures.
Navigational data access was far slower than declarative access.
Navigational access languages required the coder to embed their queries inside a procedural language shell.
Navigational languages were far slower then SQL

3. Which Oracle access method is the fastest way for Oracle to retrieve a single row?

Primary key access
Access via unique index
Table access by ROWID
Full table scan

4. Which is a major problem with SQL?

SQL cannot support object-orientation
The same query can be written in many ways, each with vastly different execution plans.
SQL syntax is too difficult for non-computer professionals to use
SQL creates excessive locks within the database

5. Which of the following can be a valid column name?

Column
1966_Invoices
Catch_#22
#Invoices

6. Which command will delete all data from a table and will not write to the rollback segment?

DROP
DELETE
CASCADE
TRUNCATE

7. Which character function can be used to return a specified portion of a character string?

INSTR
SUBSTRING
SUBSTR
POS

8. The primary key on table EMP is the EMPNO column. Which of the following statements will not use the associated index on EMPNO?

select * from EMP where nvl(EMPNO, '00000') = '59384';
select * from EMP where EMPNO = '59384';
select EMPNO, LASTNAME from EMP where EMPNO = '59384';
select 1 from EMP where EMPNO = '59834';

9. When a user creates an object without a TABLESPACE clause, where will Oracle store the segment?

System tablespace
Users tablespace
Default tablespace for the user
Default tablespace for the user

10. Which character is used to continue a statement in SQL*Plus?

*
/
-
=

11. Assuming today is Monday, 10 July 2000, what is returned by this statement: SELECT to_char(NEXT_DAY(sysdate, 'MONDAY'), 'DD-MON-RR') FROM dual;

17-JUL-00
10-JUL-00
12-JUL-00
11-JUL-00

12. Which of the following is an important consideration when tuning an SQL statement?

The number of CPUs on the server
The degree of parallelism on the tables
The use of bitmap indexes
The quality of the SQL optimization

13. Which of the following database design features is most important to SQL performance?

Removal of data redundancy
The introduction of data redundancy
The introduction of non-first normal form relations
The introduction of SQL*Plus

14. Why is searching for large-table full-table scans critical to SQL tuning?

They indicate an optimized execution plan.
They may be able to be tuned to use an index
The full-table scan should be normalized from the database design
A full-table scan is always sub-optimal.

15. What best describes the relationship between indexes and SQL performance?

Indexes are only used in special cases
Indexes are used to make table storage more efficient
Indexes rarely make a difference in SQL performance
Indexes exist solely to improve query speed.

16. To produce a meaningful result set without any cartesian products, what is the minimum number of conditions that should appear in the WHERE clause of a four-table join?

8
2
3
4

17. Which command can be used to disable all the roles including the default roles?

Set Role Off
Drop Role All
Revoke Role All
Set Role None

18. Which of the following views provides all the grants on all the objects in the database?

DBA_SYS_PRIVS
DBA_COL_PRIVS
DBA_OBJ_PRIVS
DBA_TAB_PRIVS

19. Which of the following are valid table-partitioning methods?

Range
Freelist
Hash
Index

20. Which two parameters can be set to tell the Oracle to use OMF (Oracle Managed Files)?

DB_CREATE_FILE_DEST
DB_CREATE_ONLINE_LOG_n
USER_DUMP_DEST
LOG_ARCHIVE_DEST



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HTML Quizes
HTML Quiz
XHTML Quiz
CSS Quiz
TCP/IP Quiz
CSS 1.0 Quiz
CSS 2.0 Quiz
HLML Quiz
XML Quizes
XML Quiz
XSL Quiz
XSLT Quiz
DTD Quiz
Schema Quiz
XForms Quiz
XSL-FO Quiz
XML DOM Quiz
XLink Quiz
XQuery Quiz
XPath Quiz
XPointer Quiz
RDF Quiz
SOAP Quiz
WSDL Quiz
RSS Quiz
WAP Quiz
Web Services Quiz
Browser Scripting Quizes
JavaScript Quiz
VBScript Quiz
DHTML Quiz
HTML DOM Quiz
WMLScript Quiz
E4X Quiz
Server Scripting Quizes
ASP Quiz
PERL Quiz
SQL Quiz
ADO Quiz
CVS Quiz
Python Quiz
Apple Script Quiz
PL/SQL Quiz
SQL Server Quiz
PHP Quiz
.NET (dotnet) Quizes
Microsoft.Net Quiz
ASP.Net Quiz
.Net Mobile Quiz
C# : C Sharp Quiz
ADO.NET Quiz
VB.NET Quiz
VC++ Quiz
Multimedia Quizes
SVG Quiz
Flash Quiz
Media Quiz
SMIL Quiz
Photoshop Quiz
Gimp Quiz
Matlab Quiz
Gnuplot Programming Quiz
GIF Animation Quiz
Scientific Visualization Quiz
Graphics Quiz
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W3C Quiz
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C Quiz
C++ Quiz
Visual Basic Quiz
Data Structures Using C Quiz
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Mainframe Quiz
Forth Programming Quiz
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Pascal Quiz
Delphi Quiz
Fortran Quiz
OOPs Quiz
Data Warehousing Quiz
CGI Programming Quiz
Emacs Quiz
Gnome Quiz
ILU Quiz
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Leadership Skills Quiz
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Sales & Distribution Quiz
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Netweaver Quiz
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Corba Quiz
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