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What are the tools available for Debuggiu in VB?
Sandhya.Kishan
- Jun 21st, 2012
The tools available for debugging in vb
1.Immediate Window
2.Debug.Print
3.Debug.Assert
4.Break Points
5.single step mode -
How can you tell what kind of object an object variable is holding?
Sandhya.Kishan
- Jun 21st, 2012
We declare an object variable to hold the object.For example, a word processing application may provide an Application object, a Document object, and a Toolbar object.
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How to add recovery scenario's to Test Settings through script
Sandhya.Kishan
- Jun 21st, 2012
By using "Recovery.GetScenarioName Iter, ScenarioFile, ScenarioName" statement we can add recovery scenarios to test settings.
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What types of data access have you used.?
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What is the difference between Msgbox Statement and MsgboxQ function?
Sandhya.Kishan
- Jun 21st, 2012
Msgbox statement is used to display messages where as a Msgboxq function display a message and return a value when any button in the MsgBox is pressed.
MsgBox is a built in VB function which is used as a statement and MsgBoxQ is a function defined by the user.
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How to trap Data Base Error?
Dim x as RDOError X(0).Des X(1).Number
Sandhya.Kishan
- Jun 18th, 2012
To trap database error we can use PowerBuilder which has a built-in event to capture database errors: it is the DBERROR event in the datawindow.
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Handling Error in Calling chain. This will call the top most error where the error is handled.
Sandhya.Kishan
- Jun 18th, 2012
Handling error in calling chain is used to handle the error when we call the top most error.
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Diff types of Lock Types?
RdConcurReadOnly 0 (Default) RdConcurLock 1 (Pessimistic Locking) RdConcurRowver 2 (Optimistic Lociking) RdConcurValues 3 RdConcurBatch 4
Sandhya.Kishan
- Jun 18th, 2012
Different types of lock types:
RdConcurReadOnly 0 (Default)
RdConcurLock 1 (Pessimistic Locking)
RdConcurRowver 2 (Optimistic Locking)
RdConcurValues 3
RdConcurBatch 4 -
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)
Sandhya.Kishan
- Jun 18th, 2012
There are 4 types of recordsets
Dynamic recordsets
Keyset recordsets
Static Recordset
Forward only Recordset -
Different type of Instantiation?
Private – Only for the Specific Module. Public not creatable – Private & Public Multi Use - Variable we have to declare. Single Use – Not possible through dll. Global Multiuse – Have variable not Required to Declare. Global Single Use - Only for exe.
Sandhya.Kishan
- Jun 1st, 2012
Private -only for the Specific Module.
Multi Use - variable we have to declare.
Single Use -not possible through dll.
Global Multiuse -have variable not Required to Declare.
Global Single Use - Only for exe. -
What is the difference between Property Get, Set and Let?
Set – Value is assigned to ActiveX Object from the form. Let – Value is retried to ActiveX Object from the form. Get- Assigns the value of an expression to a variable or property.
Sandhya.Kishan
- Jun 1st, 2012
Get property is used to initialize value to a variable.
Set property is used to set a reference to a property using the ByRef.
let property is used to is used to set value to a property using the ByVal.
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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 Operations in a relational database act on a complete set of rows. The set of rows returned by a SELECT statement consists of all the rows that satisfy the conditions in the WHERE clause of the statement. This complete set...
Sandhya.Kishan
- May 31st, 2012
The locks avaliable in Vb are
1.RdConcurReadOnly 0 (Default)
2.RdConcurLock 1 (Pessimistic Locking)
3.RdConcurRowver 2 (Optimistic Lociking)
4.RdConcurValues 3
5.RdConcurBatch 4 -
Record set types and Number available in VB?
3. 1- Dynaset, 0 – Table, 2 – Snap Shot.
Sandhya.Kishan
- May 31st, 2012
There are 5 recordset type available in VB
1.Table-Type Recordset -0
2.Dynaset-Type Recordset -1
3.Snapshot-Type Recordset -2
4.Dynamic-Type Recordset -2
5.Forward only type Recordset -0 -
Where will we give the option explicit keyword and for what?
In the general declarations section. To trap undeclared variables.
Sandhya.Kishan
- May 31st, 2012
We use explicit keyword to trap undeclared variables in the declaration section.
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What is control array and how many we can have it with in the form?
Group of control share the same name. Max 32, 767.
Sandhya.Kishan
- May 31st, 2012
Control array consists of a group of controls that share the same name type and the same event procedures.It is a single dimensional array and we can add or delete array elements at the run time.Contr...
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How many images can be placed in the image list?
64
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What is the diff. Between function and sub procedures
) Function will return value but a sub procedure wont return values…
Sandhya.Kishan
- May 31st, 2012
The difference between a function and sub procedure is 1.A function returns a value but the sub procedures do not return values. 2.We can call function by its name but we need to prefix a call keywor...
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What is Friend Variable?
Scope sharable between projects.
ramanpreet ghai
- May 30th, 2012
Friend variables are the variables that can be accessed by any other class within the same project.But remember ,you cant access these variables outside the project in which they are declared.
Sandhya.Kishan
- May 28th, 2012
A friend variable is used to share the scope of variables between the projects.
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What is the return type of Instr and Strcmp?
Instr – integer (Numeric position)Strcmp - integer ( if both the string are equal they result = 0) Strcmp (Str1, Str2, Comparetype) Comparing mode = 0 – Binary Comparing 1 – Textual Comparing
Sandhya.Kishan
- May 29th, 2012
Syntax of InStr InStr([start,]string1,string2[,compare]) The InStr function can return the following values: * If string1 is "" - InStr returns 0 * If string1 is Null - InStr returns Null * If stri...
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What does the Implements statement do?
Sandhya.Kishan
- May 29th, 2012
Implement statement specifies an interface or class that will be implemented in the class module in which it appears.It separates the interface of an object from its implementation, so that multiple implementations of the interface can be developed.
Visual Basic Interview Questions
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