Important Questions in Oracle,
Developer /2000(Form 4.5 and Reports 2.5)
Oracle
1) What are the Back ground
processes in Oracle and what are they.
1) This is one of the most
frequently asked question.There are basically 9 Processes
but in a general system we need to
mention the first five background processes.They do
the house keeping activities for the Oracle
and are common in any system.
The various background processes in
oracle are
a) Data Base Writer(DBWR) ::
Data Base Writer Writes Modified blocks from Database
buffer cache to Data Files.This is
required since the data is not written whenever a
transaction is commited.
b)LogWriter(LGWR) ::
LogWriter writes the redo log entries to disk. Redo Log data
is generated in redo log buffer of
SGA. As transaction commits and log buffer fills,
LGWR writes log entries into a
online redo log file.
c) System Monitor(SMON) :: The
System Monitor performs instance recovery at instance
startup.This is useful for recovery
from system failure
d)Process Monitor(PMON) :: The
Process Monitor peforms process recovery when user
Process fails. Pmon Clears and
Frees resources that process was using.
e)
CheckPoint(CKPT) :: At Specified times, all modified database buffers in
SGA are
written to data files by DBWR at
Checkpoints and Updating all data files and control
files of database to indicate the
most recent checkpoint
f)Archieves(ARCH) :: The Archiver
copies online redo log files to archival storal when they are busy.
g) Recoveror(RECO) :: The Recoveror
is used to resolve the distributed
transaction
in network
h) Dispatcher (Dnnn) :: The
Dispatcher is useful in Multi Threaded Architecture
i) Lckn :: We can have upto 10 lock
processes for inter instance locking in parallel
sql.
2) How many types of Sql Statements
are there in Oracle
2) There are basically 6 types of
sql statments.They are
a) Data Defination Language(DDL) ::
The DDL statments define and maintain
objects and
drop objects.
b) Data Manipulation Language(DML)
:: The DML statments manipulate database data.
c) Transaction Control
Statements :: Manage change by DML
d) Session Control :: Used to
control the
properties of current session
enabling and disabling roles and changing .e.g
::
Alter Statements,Set Role
e) System Control Statements :: Change Properties of Oracle
Instance .
e.g:: Alter System
f) Embedded Sql :: Incorporate
DDL,DML and T.C.S in Programming Language.e.g:: Using the Sql Statements in
languages such as 'C', Open,Fetch, execute and close
3) What is a Transaction in Oracle
3) A transaction is a Logical unit of work that compromises one or
more SQL Statements executed by a single User. According to ANSI, a transaction
begins with first executable statment and ends when it is explicitly commited
or rolled back.
4)
Key Words Used in Oracle
4) The Key words that are used in
Oracle are ::
a) Commiting :: A transaction is said to be
commited when the transaction makes permanent
changes resulting from the SQL statements.
b) Rollback :: A transaction that retracts any of the
changes resulting from SQL statements in Transaction.
c)
SavePoint :: For long
transactions that contain many SQL statements, intermediate markers or
savepoints are declared. Savepoints can be used to divide a transactino into
smaller points.
d)
Rolling Forward :: Process of applying
redo log during recovery is called rolling forward.
e) Cursor :: A cursor is a handle ( name
or a pointer) for the memory associated with a specific stament. A cursor is basically an area allocated by
Oracle for executing the Sql Statement. Oracle uses an implicit cursor
statement for Single row query and Uses Explcit cursor for a multi row query.
f) System Global Area(SGA) :: The
SGA is a shared memory region allocated by the Oracle that contains Data and
control information for one Oracle Instance.It consists of Database Buffer
Cache and Redo log Buffer.
g) Program Global Area (PGA) :: The
PGA is a memory buffer that contains
data and control information for server process.
g) Database Buffer Cache ::
Databese Buffer of SGA stores the most recently used blocks of datatbase
data.The set of database buffers in an instance is called Database Buffer
Cache.
h) Redo log Buffer :: Redo log Buffer of SGA stores all the
redo log entries.
i) Redo Log Files :: Redo log files are set of files that
protect altered database data in memory that has not been written to Data
Files. They are basically used for backup when a database crashes.
j) Process :: A Process is a 'thread of
control' or mechansim in Operating System that executes series of steps.
5) What are Procedure,functions and
Packages
5) Procedures and functions consist of set of PL/SQL
statements that are grouped together as a unit to solve a specific problem
or perform set of related tasks.
Procedures do not Return values while
Functions return one One Value
Packages :: Packages Provide a method of
encapsulating and storing related
procedures, functions, variables
and other Package Contents
6) What are Database Triggers and
Stored Procedures
6) Database Triggers :: Database
Triggers are Procedures that are automatically executed as a result of insert
in, update to, or delete from table.
Database triggers have the values old and new
to denote the old value in the table before it is deleted and the new indicated
the new value that will be used. DT are useful for implementing complex
business rules which cannot be enforced using the integrity rules.We can have
the trigger as Before trigger or After Trigger and at Statement or Row level.
e.g:: operations insert,update
,delete 3
before ,after 3*2 A total of 6
combinatons
At statment level(once for the trigger)
or row level( for every execution )
6 * 2 A total of 12.
Thus a total of 12 combinations are there and
the restriction of usage of 12 triggers has been lifted from Oracle 7.3
Onwards.
Stored Procedures :: Stored Procedures are Procedures that are
stored in Compiled
form in the database.The advantage
of using the stored procedures is that many users
can use the same procedure in
compiled and ready to use format.
7) How many Integrity Rules are
there and what are they
7) There are Three Integrity Rules.
They are as follows ::
a) Entity Integrity Rule :: The
Entity Integrity Rule enforces that the
Primary key cannot be Null
b) Foreign Key Integrity Rule ::
The FKIR denotes that the relationship between the
foreign key and the primary key has
to be enforced.When there is data in Child Tables
the Master tables cannot be
deleted.
c) Business Integrity Rules :: The
Third Intigrity rule is about the complex business
processes which cannot be
implemented by the above 2 rules.
8) What are the Various Master and
Detail Relation ships.
8) The various Master and Detail
Relationship are
a) NonIsolated :: The Master cannot
be deleted when a child is exisiting
b) Isolated :: The Master can be deleted when the
child is exisiting
c) Cascading :: The child gets deleted when the Master
is deleted.
9) What are the Various Block
Coordination Properties
9) The various Block Coordination
Properties are
a) Immediate
Default Setting. The Detail records
are shown when the Master Record are shown.
b) Deffered with Auto Query
Oracle Forms defer fetching the
detail records until the operator navigates to the detail block.
c) Deffered with No Auto Query
The operator must navigate to the
detail block and explicitly execute a
query
10) What are the Different
Optimisation Techniques
10) The Various Optimisation
techniques are
a) Execute Plan :: we can see the
plan of the query and change it accordingly based on the indexes
b) Optimizer_hint ::
set_item_property('DeptBlock',OPTIMIZER_HINT,'FIRST_ROWS');
Select /*+ First_Rows */
Deptno,Dname,Loc,Rowid from dept
where (Deptno > 25)
c) Optimize_Sql ::
By setting the Optimize_Sql = No,
Oracle Forms assigns a single cursor for all SQL statements.This slow downs the
processing because for evertime the SQL must be parsed whenver they are
executed.
f45run module = my_firstform userid
= scott/tiger optimize_sql = No
d) Optimize_Tp ::
By setting the Optimize_Tp= No, Oracle Forms
assigns seperate cursor only for each query SELECT statement. All other SQL statements reuse the
cursor.
f45run module = my_firstform userid
= scott/tiger optimize_Tp = No
11) How do u implement the If
statement in the Select Statement
11) We can implement the if
statement in the select statement by using the Decode statement.
e.g select DECODE (EMP_CAT,'1','First','2','Second'Null);
Here the Null is the else statement
where null is done .
12)How many types of Exceptions are
there
12) There are 2 types of
exceptions. They are
a) System Exceptions
e.g. When no_data_found, When
too_many_rows
b) User Defined Exceptions
e.g. My_exception exception
When My_exception then
13) What are the inline and the
precompiler directives
13) The inline and precompiler
directives detect the values directly
14) How do you use the same lov for
2 columns
14) We can use the same lov for 2
columns by passing the return values in
global values and using the global values in the code
15) How many minimum groups are
required for a matrix report
15) The minimum number of groups in
matrix report are 4
16) What is the difference between
static and dynamic lov
16) The static lov contains the
predetermined values while the dynamic
lov contains values that come at run time
17) What are snap shots and views
17) Snapshots are mirror or
replicas of tables. Views are built using the columns from one or more tables.
The Single Table View can be updated but the view with multi table cannot be
updated
18) What are the OOPS concepts in
Oracle.
18) Oracle does implement the OOPS
concepts. The best example is the Property Classes. We can categorise the
properties by setting the visual attributes and then attach the property
classes for the
objects. OOPS supports the concepts
of objects and classes and we can consider the peroperty classes as classes and
the items as objects
19)
What is the difference between candidate key, unique key and primary key
19) Candidate keys are the columns
in the table that could be the primary keys and the primary key
is the key that has been selected
to identify the rows. Unique key is also useful for identifying the distinct rows in the table.
20)What is concurrency
20) Cuncurrency is allowing simultaneous access of same data by
different users. Locks useful for
accesing the database are
a) Exclusive
The exclusive lock is useful for
locking the row when an insert,update or delete is being done.This lock should
not be applied when we do only select
from the row.
b) Share lock
We can do the table as Share_Lock
as many share_locks can be put on the same resource.
21) Previleges and Grants
21) Previleges are the right to execute a particulare type of SQL statements.
e.g :: Right to Connect, Right to
create, Right to resource
Grants are given to the objects so
that the object might be accessed accordingly.The grant has to be
given by the owner of the object.
22)Table Space,Data Files,Parameter
File, Control Files
22)Table Space :: The table space
is useful for storing the data in the database.When a database is created two
table spaces are created.
a) System Table space :: This data
file stores all the tables related to the system and dba tables
b) User Table space :: This data file stores all the user
related tables
We should have seperate table
spaces for storing the tables and indexes so that the access is fast.
Data Files :: Every Oracle Data
Base has one or more physical data files.They store the data for the
database.Every datafile is associated with only one database.Once the Data file
is created the size cannot change.To increase the size of the database to store
more data we have to add data file.
Parameter Files :: Parameter file
is needed to start an instance.A parameter file contains the list of instance
configuration parameters e.g.::
db_block_buffers = 500
db_name = ORA7
db_domain = u.s.acme lang
Control Files :: Control files record the physical
structure of the data files and redo log files
They contain the Db name, name and
location of dbs, data files ,redo log files and time stamp.
23) Physical Storage of the Data
23) The finest level of granularity
of the data base are the data blocks.
Data Block :: One Data Block
correspond to specific number of
physical database space
Extent :: Extent is the number of specific
number of contigious data blocks.
Segments ::
Set of Extents allocated for Extents. There are three types of Segments
a) Data Segment :: Non Clustered
Table has data segment data of every table
is stored in
cluster data segment
b) Index Segment :: Each Index has
index segment that stores data
c) Roll Back Segment :: Temporarily
store 'undo' information
24) What are the Pct Free and Pct
Used
24) Pct Free is used to denote the
percentage of the free space that is to be left when creating a table.
Similarly Pct Used is used to denote the percentage of the used space that is
to be used when creating a table
eg.:: Pctfree 20, Pctused 40
26) What is a 2 Phase Commit
26) Two Phase commit is used in
distributed data base systems. This is useful to maintain the integrity of the
database so that all the users see the same values. It contains DML statements
or Remote Procedural calls that reference a remote object. There are basically
2 phases in a 2 phase commit.
a) Prepare Phase :: Global
coordinator asks participants to prepare
b) Commit Phase :: Commit all participants to
coordinator to Prepared, Read only or abort Reply
27)
What is the difference between
deleting and truncating of tables
27)
Deleting a table will not remove
the rows from the table but entry is there
in
the database dictionary and it can be retrieved But truncating a table
deletes
it completely and it cannot be
retrieved.
28) What are mutating tables
28) When a table is in state of
transition it is said to be mutating. eg ::
If a row has been deleted then the
table is said to be mutating and no operations can
be done on the table except select.
29)
What are Codd Rules
29) Codd Rules describe the ideal
nature of a RDBMS. No RDBMS satisfies all the 12 codd rules and Oracle
Satisfies 11 of the 12 rules and is the only Rdbms to satisfy the maximum
number of rules.
30) What is Normalisation
30) Normalisation is the process of
organising the tables to remove the redundancy.There are mainly 5 Normalisation
rules.
a) 1 Normal Form :: A table is said to be in 1st Normal Form when
the attributes
are atomic
b) 2 Normal Form :: A table is said to be in 2nd Normal Form when
all the
candidate keys are dependant on the
primary key
c) 3rd Normal Form :: A table is
said to be third Normal form when it is not
dependant transitively
31) What is the Difference between
a post query and a pre query
31) A post query will fire for
every row that is fetched but the pre query will fire only once.
32) Deleting the Duplicate rows in
the table
32) We can delete the duplicate rows
in the table by using the Rowid
33) Can U disable database trigger?
How?
33) Yes. With respect to table
ALTER TABLE TABLE
[ DISABLE all_trigger ]
34) What is pseudo columns ? Name
them?
34) A pseudocolumn behaves like a table
column, but is not actually
stored in the table. You can
select from pseudocolumns, but you
cannot insert, update, or delete their values. This section
describes these pseudocolumns:
* CURRVAL
* NEXTVAL
* LEVEL
* ROWID
* ROWNUM
35) How many columns can table
have?
The number of columns in a table can range from 1 to 254.
36) Is space acquired in blocks or
extents ?
In extents .
37) what is clustered index?
In an indexed cluster, rows are
stored together based on their cluster
key values .
Can not applied for HASH.
38) what are the datatypes
supported By oracle (INTERNAL)?
Varchar2, Number,Char , MLSLABEL.
39 ) What are attributes of cursor?
%FOUND , %NOTFOUND , %ISOPEN,%ROWCOUNT
40) Can you use select in FROM
clause of SQL select ?
Yes.
Forms 4.5 Questions
1) Which trigger are created when
master -detail rela?
1) master delete property
*
NON-ISOLATED (default)
a) on check delete master
b) on clear details
c) on populate details
*
ISOLATED
a) on clear details
b) on populate details
*
CASCADE
a) per-delete
b) on clear details
c) on populate details
2) which system variables can be
set by users?
SYSTEM.MESSAGE_LEVEL
SYSTEM.DATE_THRESHOLD
SYSTEM.EFFECTIVE_DATE
SYSTEM.SUPPRESS_WORKING
3) What are object group?
An object group is a container for
a group of objects. You define an object group
when you want to package related objects so you can copy or
reference them in
another module.
4) What are referenced objects?
Referencing allows you to create
objects that inherit their functionality and appearance from other objects.
Referencing an object is similar to
copying an object, except that the resulting reference object maintains a
link to its source object. A
reference object automatically inherits any changes that have been made to the
source object when you open or
regenerate the module that contains the reference object.
5) Can you store objects in
library?
Referencing allows you to create
objects that inherit their functionality and appearance from other
objects. Referencing an object is
similar to copying an object, except that the resulting reference
object maintains a link to its
source object. A reference object automatically inherits any changes that
have been made to the source object
when you open or regenerate the module that contains the
reference object.
6) Is forms 4.5 object oriented
tool ? why?
6)
yes , partially. 1) PROPERTY CLASS
- inheritance property
2) OVERLOADING :
procedures and functions.
7) Can you issue DDL in forms?
7)
yes, but you have to use FORMS_DDL.
Referencing allows you to create
objects that inherit their functionality and appearance from other
objects. Referencing an object is
similar to copying an object, except that the resulting reference object
maintains a link to its source
object. A reference object automatically inherits any changes that have
been made to the source object when
you open or regenerate the module that contains the reference object.
Any string expression up to 32K:
·a literal
· an
expression or a variable representing the text of a block of dynamically
created PL/SQL code
· a
DML statement or
· a
DDL statement
Restrictions:
The statement you pass to FORMS_DDL
may not contain bind variable references in the string, but the
values of bind variables can be
concatenated into the string before passing the result to FORMS_DDL.
8) What is SECURE property?
8)- Hides characters that the
operator types into the text item. This
setting is typically used for
password protection.
9 ) What are the types of triggers
and how the sequence of firing in text item
9)
Triggers can be classified as Key
Triggers, Mouse Triggers ,Navigational Triggers.
Key Triggers :: Key Triggers are
fired as a result of Key action.e.g :: Key-next-field, Key-up,Key-Down
Mouse Triggers :: Mouse Triggers
are fired as a result of the mouse navigation.e.g.
When-mouse-button-presed,when-mouse-doubleclicked,etc
Navigational Triggers :: These
Triggers are fired as a result of Navigation. E.g : Post-Text-item,Pre-text-item.
We also have event triggers like when
–new-form-instance and when-new-block-instance.
We cannot call restricted
procedures like go_to('my_block.first_item') in the Navigational triggers
But can use them in the
Key-next-item.
The Difference between Key-next and
Post-Text is an very important question. The key-next is fired as a result of
the key action while the post text is
fired as a result of the mouse movement. Key next will not fire unless there is
a key event.
The sequence of firing in a text
item are as follows ::
a) pre - text
b) when new item
c) key-next
d) when validate
e) post text
10 ) Can you store pictures in
database? How?
10)Yes , in long Raw datatype.
11) What are property classes ? Can
property classes have trigger?
11) Property class inheritance is a
powerful feature that allows you to quickly define objects that conform to
your own interface and
functionality standards. Property classes also allow you to make global changes
to
applications quickly. By simply changing the definition of a
property class, you can change the definition
of all objects that inherit
properties from that class.
Yes . All type of triggers .
* 12 a) If you have property class
attached to an item and you have same trigger written for the item .
Which will fire first?
12)Item level trigger fires , If item level trigger fires, property
level trigger won't fire. Triggers at the lowest level are always given the
first preference. The item level trigger fires first and then the block and
then the Form level trigger.
13) What are record groups ? * Can
record groups created at run-time?
13)A record group is an internal
Oracle Forms data structure that has a column/row framework similar to a
database table. However, unlike database tables, record
groups are separate objects that belong to the
form module in which they are
defined. A record group can have an
unlimited number of columns of type
CHAR, LONG, NUMBER, or DATE
provided that the total number of columns does not exceed 64K.
Record group column names cannot
exceed 30 characters.
Programmatically, record groups can
be used whenever the functionality offered by a two-dimensional
array of multiple data types is
desirable.
TYPES OF RECORD GROUP:
Query Record Group A query record group is a record group
that has an associated SELECT statement.
The columns in a query record group
derive their default names, data types, and lengths from the database columns referenced in the SELECT statement. The records in a query record group are the
rows retrieved by the query associated with that record group.
Non-query Record Group A non-query record group is a group that does
not have an associated query, but whose structure and values can be modified
programmatically at runtime.
Static Record Group A static record group is not associated
with a query; rather, you define its
structure and row values at design
time, and they remain fixed at
runtime.
14) What are ALERT?
14)An ALERT is a modal window that
displays a message notifiying operator of some application
condition.
15) Can a button have icon and
lable at the same time ?
15) -NO
16) What is mouse navigate property
of button?
16)
When Mouse Navigate is True (the
default), Oracle Forms performs standard navigation to move the focus
to the item when the operator
activates the item with the mouse.
When Mouse Navigate is set to
False, Oracle Forms does not perform navigation (and the resulting validation)
to move to the item when an operator activates the item with the mouse.
17) What is FORMS_MDI_WINDOW?
17)
forms run inside the MDI application window. This property is useful for
calling a form from another one.
18)
What are timers ? when
when-timer-expired does not fire?
18) The When-Timer-Expired trigger can not
fire during trigger, navigation, or transaction processing.
19 ) Can object group have a block?
19)Yes , object group can have block as well
as program units.
20) How
many types of canvases are there.
20)There are 2 types of canvases
called as Content and Stack Canvas. Content canvas is the default and the one
that is used mostly for giving the base effect. Its like a plate on which we
add items and stacked canvas is used for giving 3 dimensional effect.
The following questions might not
be asked in an Average Interview and could be asked when the Interviewer wants
to trouble u and go deeppppppppppppp……He cannot go further…..
1) What are user-exits?
1)
It invokes 3GL programs.
2) Can you pass values to-and-fro
from foreign function ? how ?
2) Yes . You obtain a return value
from a foreign function by assigning the return value to an Oracle Forms
variable or item. Make sure that the Oracle Forms variable or
item is the same data type as the return value
from the foreign function.
After assigning an Oracle Forms
variable or item value to a PL/SQL variable, pass the PL/SQL variable as
a parameter value in the PL/SQL
interface of the foreign function. The
PL/SQL variable that is passed as
a parameter must be a valid PL/SQL
data type; it must also be the appropriate parameter type as defined
in the PL/SQL interface.
3) What is IAPXTB structure ?
3) The entries of Pro * C and user exits and the form which
simulate the proc or user_exit are stored in IAPXTB table in d/b.
4) Can you call WIN-SDK thruo' user
exits?
4) YES.
5) Does user exits supports DLL on
MSWINDOWS ?
5) YES .
6) What is path setting for DLL?
6) Make sure you include the name
of the DLL in the FORMS45_USEREXIT variable of the ORACLE.INI file, or rename
the DLL to F45XTB.DLL. If you rename the
DLL to F45XTB.DLL, replace the existing F45XTB.DLL in the \ORAWIN\BIN directory
with the new F45XTB.DLL.
7) How is mapping of name of DLL and function
done?
7) The dll can be created using the
Visual C++ / Visual Basic Tools and then the dll is put in the
path that is defined the registery.
8) what is precompiler?
8) It is similar to C precompiler directives.
9) Can you connect to non - oracle datasource
? How?
9) Yes .
10 ) what are key-mode and locking
mode properties? level ?
10) Key Mode : Specifies how oracle
forms uniquely identifies rows in the database.This is property includes
for application that will run
against NON-ORACLE datasources .
Key setting unique (default.)
dateable
n-updateable.
Locking mode :
Specifies when Oracle Forms should
attempt to obtain database locks on rows that correspond to queried records in
the form.
a) immediate b) delayed
11) What are savepoint mode and
cursor mode properties ? level?
11) Specifies whether Oracle Forms
should issue savepoints during a session. This property is included
primarily for applications that will run
against non-ORACLE data sources. For
applications that will run against ORACLE, use the default setting.
Cursor mode - define cursur state
across transaction
Open/close.
12) Can you replace default form
processing ? How ?
13) What is transactional trigger
property?
13)
Identifies a block as transactional control block. i.e. non - database
block that oracle forms should manage as
transactional block.(NON-ORACLE datasource) default - FALSE.
14) What is OLE automation ?
14) OLE automation allows an OLE
server application to expose a set of commands and functions that can be
invoked from an OLE container
application. OLE automation provides a
way for an OLE container application to
use the features of an OLE server application to manipulate an OLE object from
the OLE container environment. (FORMS_OLE)
15) What does invoke built-in do?
15) This procedure invokes a
method.
Syntax:
PROCEDURE OLE2.INVOKE
(object obj_type,
method VARCHAR2,
list list_type := 0);
Parameters:
object Is an OLE2 Automation Object.
method Is a method (procedure) of the OLE2 object.
list Is the name of an argument list assigned to the OLE2.CREATE_ARGLIST
function.
16) What are
OPEN_FORM,CALL_FORM,NEW_FORM? diff?
16) CALL_FORM : It calls the other
form. but parent remains active, when called form completes the operation
, it releases lock and control goes back
to the calling form.
When you call a form, Oracle Forms
issues a savepoint for the called form.
If the CLEAR_FORM function
causes a rollback when the called
form is current, Oracle Forms rolls back uncommitted changes to this
savepoint.
OPEN_FORM : When you call a form,
Oracle Forms issues a savepoint for the called form. If the
CLEAR_FORM function causes a
rollback when the called form is current, Oracle Forms rolls back
uncommitted changes to this
savepoint.
NEW_FORM : Exits the current form and enters the
indicated form. The calling form is
terminated as
the parent form. If the calling form had been called by a higher
form, Oracle Forms keeps the higher call
active and treats it as a call to the new
form. Oracle Forms releases memory (such
as database cursors)
that the terminated form was using.
Oracle Forms runs the new form with
the same Runform options as the parent form.
If the parent form was
a called form, Oracle Forms runs
the new form with the same options as the parent form.
17 ) What is call form stack?
17) When successive forms are
loaded via the CALL_FORM procedure, the resulting module hierarchy is
known as the call form stack.
18) Can u port applictions across
the platforms? how?
18) Yes we can port applications
across platforms.Consider the form developed in a windows system.The form would
be generated in unix system by using f45gen my_form.fmb scott/tiger
GUI
1) What is a visual attribute?
1) Visual attributes are the font,
color, and pattern properties that you set for form and menu objects that
appear in your application's interface.
2) Diff. between VAT and Property
Class? imp
2)Named visual attributes define
only font, color, and pattern attributes; property classes can contain these
and any other properties.
You can change the appearance of
objects at runtime by changing the named visual attribute
programmatically; property class
assignment cannot be changed programmatically.
When an object is inheriting from
both a property class and a named visual attribute, the named visual
attribute settings take precedence,
and any visual attribute properties in the class are ignored.
3 ) Which trigger related to mouse?
3) When-Mouse-Click
When-Mouse-DoubleClick
When-Mouse-Down
When-Mouse-Enter
When-Mouse-Leave
When-Mouse-Move
When-Mouse-Up
4) What is Current record attribute
property?
4)
Specifies the named visual attribute used when an item is part of the
current record.
Current Record Attribute is
frequently used at the block level to display the current row in a multi-record
If you define an item-level Current
Record Attribute, you can display a pre-determined item in a special color
when it is part of the current
record, but you cannot dynamically highlight the current item, as the input
focus changes.
5) Can u change VAT at run time?
5) Yes. You can programmatically
change an object's named visual attribute setting to change the font, color,
and pattern of the object at
runtime.
6) Can u set default font in forms?
6) Yes. Change windows
registry(regedit). Set form45_font to the desired font.
7) Can u have OLE objects in forms?
7) Yes.
8) Can u have VBX and OCX controls
in forms ?
8) Yes.
9) What r the types of windows
(Window style)?
9) Specifies whether the window is
a Document window or a Dialog window.
10) What is OLE Activation style
property?
10) Specifies the event that will
activate the OLE containing item.
11) Can u change the mouse pointer
? How?
11) Yes. Specifies the mouse cursor
style. Use this property to dynamically
change the shape of the cursor.
Reports 2.5
1) How
many types of columns are there and what are they
1) Formula
columns :: For doing mathematical calculations and returning one value
Summary Columns :: For doing
summary calculations such as summations etc.
Place holder Columns :: These
columns are useful for storing the value in a variable
2) Can
u have more than one layout in report
2)
It is possible to have more than one layout in a report by using the additional
layout option in the layout editor.
3) Can u run the report with out a parameter
form
3) Yes
it is possible to run the report without parameter form by setting the PARAM
value to Null
4)
What is the lock option in reports layout
4) By
using the lock option we cannot move the fields in the layout editor outside
the frame. This is useful for maintaining the fields .
5) What
is Flex
5) Flex is the property of moving
the related fields together by setting the flex property on
6) What
are the minimum number of groups required for a matrix report
6)
The minimum of groups required for a matrix report are 4
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