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Q:

What are the rules which should be followed while naming a variable in VB?

Answer

Some of the rules which should be followed while naming a variable in VB are as follows: 


1) Characters should be less than 255.


2) Space between characters should be allowed.


3) A variable should begin with a number.


4) Period may not be permitted.

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Q:

What are the different ways to Declare and Instantiate an object in Visual Basic 6?

Answer

Dim obj as OBJ.CLASS with eitherSet obj = New OBJ.CLASS orSet obj = CreateObject(OBJ.CLASS?) orSet obj = GetObject( , OBJ.CLASS?)orDim obj as New OBJ.CLASS 

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Q:

What is the difference between dao,rdo and ado explain simply ?

Answer

DAO (Data access object ) is used for accessing data before ado it was used for database installed on same sys where the application resides.


RDO (Remote data object ) is used for accessing remote data


ADO (Active data object ) most powerful till date it is nothing but combination of both DAO and RDO 

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Q:

What is the difference between ADODC and ADODB?

Answer

- When u build connection with database through coding, then its ADODB.When u build connection with database through ADO component, then its ADODC.


- ADODB is a ActiveXdll and ADODC is a ActiveXcontrol.


- No Need to bind with controls in ADODB whereas in ADODC we should bind with controls.

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Q:

What is the difference between Listview and Treeview?

Answer

Tree view control is designed to display data that is hierarchical in nature, such as organization trees, the entries in an index, the files, directories on a disk. It is often used in conjuction with the List view control, which is used to display the contents of the folder selected in the tree view.


List view control displays data as listitem objects. The control excels at representing subsets of data or discrete objects.The list view property is often used in association with a tree view control.

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Q:

What are the three file types in NT ?

Answer

NTFS, FAT & FAT 32 are the file systems of NT.

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Q:

Explain When is Marshalling not necessary?

Answer

Marshalling is the process of packaging and sending interface method parameters across thread, process or machine boundaries.


It is not necessary when the client and the server are on the same computer.

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Q:

How do you check the syntax of a JCL without running it?

Answer

TYPERUN=SCAN on the JOB card or use JSCAN.


TYPERUN=HOLD on the job card.


it is used for syntatical checks and direct job to spool and hold it.

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