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Quiz for PL/SQL Tutorial





1. What output will the follwing statement produce? Select NVL2(NULL,'NOT NULL', NULL) from dual;

NULL
NOT NULL
Function NVL2 is not defined
None of the above

2. Which three definitions are associated with implicit cursors?

%rowtype, %toomanyrows, %found
%found, %notfound, %rowcount
%rowtype, %rowcount, %notfound
None of the above

3. In this PL/SQL statement, which of the following lines will produce an error?

cursor CAPITALS is
select CITY, STATE
into my_city, my_state
from CITIES

4. In a PL/SQL block, a variable is declared as NUMBER without an initial value. What will its value be when it is first used in the executable section of the PL/SQL block?

NULL
0
Results in a compilation error
An exception will be raised

5. PL/SQL raises an exception, in which TWO of the following cases:

When a SELECT statement returns no rows
When a SELECT statement returns more than one row
When the datatypes of SELECT clause and INTO clause do not match
When INTO statement is missing in the SELECT statement

6. PL/SQL raises an exception, in which TWO of the following cases:

When a SELECT statement returns no rows
When a SELECT statement returns more than one row
When the datatypes of SELECT clause and INTO clause do not match
bothab

7. What is the result if two NULL values are compared to each other?

TRUE
False
Undefined
NULL

8. Functions for error trapping are contained in which section of a PL/SQL block?

Header
Declarative
Executable
Exception

9. Which section of a PL/SQL block would most likely contain a RAISE statement?

Header
Declarative
Executable
Exception

10. Select the VALID trigger type(s)?

AFTER statement trigger
INSERT row trigger
DELETE row trigger
UPDATE row trigger

11. In this SQL statement, which of the following lines will produce an error?

CREATE OR REPLACE TRIGGER check_age
BEFORE INSERT OR UPDATE ON employee FOR EACH ROW
IS
years_old NUMBER;

12. In this PL/SQL statement, which of the following lines will produce an error?

create or replace function vat (vat_rate IN NUMBER, price IN NUMBER)
declare
l_vat NUMBER;
begin

13. For an unconditional approach to a particular part of a complex PL/SQL block, which of the following control structures can be used?

If-Then-Else
While loop
GoTo
Decode

14. Which of the following statements about an SQL statement are not correct?

SQL statements can be on one or more lines.
Keywords cannot be split across lines.
SQL statements are not case-sensitive, unless indicated.
Keywords can be abbreviated.

15. Suppose you have to remove a table. There are several indexes associated with this table.

DROP INDEX
DROP INDEX
ALTER TABLE ....... DROP CONSTRAINT
DROP TABLE

16. Which section of a PL/SQL block would most likely contain a RAISE statement?

Header
Declarative
Executable
Exception

17. What does the term 'locking' refer to?

Locking is a process, which logs database usage.
Locking is the process of database authentication.
Locking is a process preventing users from reading data being changed by other users, and prevents concurrent users from changing the same data at the same time.


18. What does ACID stand for?

Access. Consistency. Isolation. Data.
Atomicity. Consistency. Isolation. Durability.
Access. Constraint. Index. Data.


19. What is a database cursor?

A blinking vertical line that indicates the location of the next input on the display screen.
A cursor is SQL keyword specifying a retrieved data order.
Cursor is acronym for Current Set Of Records and is a database object pointing to a currently selected set of records.


20. Which SQL statement inserts data into a table called Projects?

INSERT INTO Projects (ProjectName, ProjectDescription) VALUES ('Content Development', 'Website content development project')
INSERT Projects ('Content Development', 'Website content development project')
INSERT Projects VALUES ('Content Development', 'Website content development project')
SAVE INTO Projects (ProjectName, ProjectDescription) VALUES ('Content Development', 'Website content development project')



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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
Web Building  Quizes
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Web Hosting Quiz
W3C Quiz
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Java Quiz
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C Quiz
C++ Quiz
Visual Basic Quiz
Data Structures Using C Quiz
Cobol 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
Soft Skills Quizes
Communication Skills Quiz
Time Management Quiz
Project Management Quiz
Team Work Quiz
Leadership Skills Quiz
Corporate Communication Quiz
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Sales & Distribution Quiz
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Netweaver Quiz
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