Technical interview questions and answers are important for a Visual Basic Interview because many companies still use VB for maintaining legacy applications, automation tasks, and Windows-based tools. Recruiters expect candidates to understand syntax, variables, loops, functions, event-driven programming, and form design. Visual Basic remains relevant for industries that rely on older but stable systems, so questions from VB often appear in interviews at companies like TCS, Infosys, Wipro, Cognizant, and Accenture. This guide includes frequently asked Visual Basic interview questions with simple, clear explanations that help freshers and job seekers prepare effectively. These questions will strengthen your understanding of VB fundamentals and improve your performance in both technical rounds and project discussions during campus placements.
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11. What are the ADO objects?
Provide a scenario using three of them to return data from a database. Expected answer: Connection Connects to a data source; contains the Errors collectionCommand Executes commands to the data source. Is the only object that can accept parameters for a stored procedure.Recordset The set of data returned from the database.Scenario: There are many possibilities. The most likely is as follows:Dim conn As ADODB.ConnectionDim rs As ADODB.RecordsetDim Cmd As ADODB.Commandconn.ConnectionString = ?CONN
12. Under the ADO Command Object, what collection is responsible for input to stored procedures?
14. What is the benefit of wrapping database calls into MTS transactions?
If database calls are made within the context of a transaction, aborting the transaction will undo and changes that occur within that transaction. This removes the possibility of stranded, or partial data.
15. Describe and In Process vs. Out of Process component. Which is faster?
An in-process component is implemented as a DLL, and runs in the same process space as its client app, enabling the most efficient communication between client and component.Each client app that uses the component starts a new instance of it.An out of process component is implemented as an EXE, and unlike a dll, runs in its own process space. As a result, exes are slower then dlls because communications between client and component must be marshalled across process boundaries. A single instanc
16. What are the main components of the ADO object model? How are they used?
Connection: Used to make a connection between your app and an external data source, ie, sql server.Command: Used to build queries, including user-specific parameters, to access records from a data source (which are returned in a Recordset)Recordset:Used to access records returned from an SQL query. With a recordset, you can navigate returned records. You can also add, modify or delete records.
17. Can We create CGI scripts in VB??
Yes.
18. Dim x, y as integer. What is x and y data type?
X as variant and y as integer.
19. What is Centralization Error Handling?
Writing function and calling it when error occurs.
20. What is frx?
When some controls like grid and third party control placed in our application then it will create frx in run time.