41⟩ Private Dim x as integer. Valid ?
Private cannot be used in front of DIM.
Visual Basic (VB)
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102 Visual Basic (VB) Questions And Answers
42⟩ What is the diff between RDO and ADO?
RDO is Hierarchy model where as ADO is Object model. ADO can access data from both flat files as well as the data bases. I.e., It is encapsulation of DAO, RDO , OLE that is why we call it as OLE-DB Technology.
43⟩ What are the record set types?
RdOpenFowardOnly 0 (Default used only for the read only purpose)
RdOpenStatic 1
RdOpenDynamic 2
RdOpenKeySet 3 (Normally used for the live project)
44⟩ What are the scopes of the class?
Public,
private,
Friend
45⟩ What are the different types of Dialog Box in VB?
Predefined,
Custom,
User Defined.
46⟩ What are the locks available in Visual Basic?
Locking is the process by which a DBMS restricts access to a row in a multi-user environment 4 types of locks. They are
1. Batch Optimistic
2. Optimistic
3. Pessimistic
4. ReadOnly
47⟩ What is MAPI in VB?
Messaging Application programming Interface.
48⟩ What the RDO Methods and Events?
Methods Events
Begin Trans Validate
Commit Trans Reposition
Rollback Trans Error
Cancel Query Complied
Refresh
Update Controls
Update row
49⟩ What are properties available in Clip Board?
No Properties Available. Only the methods they are SetText,
GetText,
Setdata(),
Getformat(),
Clear.
50⟩ What is the different between Microsoft ODBC Driver and Oracle OBDC Driver?
Microsoft ODBC driver will support all the methods and properties of Visual Basic. Where as the Oracle not.
51⟩ What is Seek Method which type of record set is available this?
Only in DbOpenTables.
Syntax: rs.index = "empno"
rs.seek "=" , 10
If with our setting the rs.index then run time error will occur.
52⟩ What is Zorder Method?
Object.Zorder = 1 or 0 Place a Specified mdiform form or control at the front or back of the z-order with n its Graphical Level.
53⟩ Can us able to set Instancing properties like Singleuse, GlobalSingleuse to ActiveXDll?
No
54⟩ Diff type of Datatypes in VB?
LOB (Large Object Data type).
CLOB (Stores Character Objects).
BLOB ( Store Binary Objects such as Graphic, Video Chips and Sound files).
BFILE(Store file pointers to LOB It may Contain filename for photo’s store on CD_ROM).
55⟩ What is DBSqlPassThrough?
It will By Passing the Jet Query Processor.
56⟩ What is Static Variable in VB?
Its Scope will be available through out the life time.
57⟩ What is Tabstrip control?
Libraries of procedure external to the application but can be called from the application.
58⟩ What is the starting Index value? How to locate it?
It is tab control to place our controls with in the form in multiple sheets.
Index starts with 1.
And to identify If Tabstrip1.SelectedItem.
Index = 1 Then ..
End if
59⟩ What is Parser Bug?
It is difficult to use database objects declared in a module from within a form.
60⟩ Suppose from form1 to form2 object property settings will arise to ?
Invalid procedure call or argument (Run time error 5)
