81⟩ What are two validate with Data Control?
Data_Validate, Data_Error.
Visual Basic (VB)
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102 Visual Basic (VB) Questions And Answers
82⟩ What is difference between datagrid and flexgrid?
Datagrid Editable. Flexigrid Non-Editable. (Generally used for Read only purpose.)
83⟩ What are types of binding?
Assigning variable with defined memory space.
Late Binding - Memory size is allotted in later stage.
Ex:- Dim x as object
Early Binding - Memory size is allotted while declaring itself. New Key word is important.
Ex:- Dim x as New Object
84⟩ What is RdExecDirect?
Bypasses the Creation of a stored procedure to execute the query. Does not apply to Oracle.
85⟩ What is Mask Edit and why it is used?
Control. Restricted data input as well as formatted data output.
86⟩ Different type of Passing Value?
By value, By ref, Optional, Param Array. Note:- Optional keyword cannot be used while declaring arguments for a function using param array.
87⟩ What methods are used for DBGrid in unbound mode?
AddData,
EditData,
Readdata,
WriteData.
88⟩ What are the Technologies for Accessing Database from Visual Basic?set?
DAO,
Data Control,
RDO,
ODBCDIRECT,
ADO,
ODBC
API ,
0040.
89⟩ What is the diff between the Create Object and Get object?
Create Object - To create an instance of an object.
Get Object To get the reference to an existing object.
90⟩ What is Dataware Control?
Any control bound to Data Control.
Ex:- Textbox, Check Box, Picture Box, Image Control, Label, List box, Combo Box, DB Combo,
91⟩ What is the max size allowed for Max Text box length.
32,000
92⟩ How many procedures are in VB?
2.
function and sub procedures
93⟩ What is the max size allowed for Max Control Names length?
255
94⟩ What is ADO? What are its objects ?
ActiveX Data Object. ADO can access data from both flat files as well as the databases. I.e., It is encapsulation of DAO, RDO, and OLE that is why we call it as OLE-DB Technology. Objects are Connection, Record Set, Command, Parameter, field, Error, Property.
95⟩ Record set types and Number available in VB?
3.
1- Dynaset, 0 Table, 2 Snap Shot.
96⟩ DSN Less Connection in VB?
"Server=Oracle; Driver={Microsoft ODBC for Oracle};"
97⟩ what will be the result for 15/4 and 154 ?
15/4 = 3.75 and 154 = 3
98⟩ Calling Stored Procedures in VB?
1. Calling Simply the Procedure with out Arguments "Call ProcedureName}"
2. If it is with Arguments Means then
Declare the Query Def qy
Set Qy as New Query def
Qy.SQL = "{Call ProcedureName(?
99⟩ What is the max size allowed for Msgbox Prompt and Input Box?
1024
100⟩ What is the max size allowed for Max label caption length?
2,048
