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Visual Basic Interview Questions & Answers

Visual Basic Technical Interview Questions

Advanced 730 views

VB 6, COM, DCOM, Microsoft platform interview questions

Following are some VB 6, COM, DCOM, Microsoft platform interview questions, answer them if you can. 1. 3 main differences between flexgrid control and dbgrid control 2. ActiveX and Types of ActiveX Co...

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Advanced 647 views

Visual Basic Interview questions

Following are some Visual Basic Interview questions, answer them if you can. 1. How do you register a component? Expected answer: Compiling the component, running REGSVR32 MyDLL.dll 2. Name and explai...

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Medium 8 views

How would you validate integer input without using exceptions for an expected invalid value?

Use Integer.TryParse to attempt conversion and check its Boolean result before using the output. Invalid text and values outside the Integer range return False instead of requiring an exception-driven...

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Easy 6 views

What do Option Strict On and Option Explicit On help catch in VB.NET?

Option Explicit On requires variables to be declared before use, helping catch misspelled names. Option Strict On rejects implicit narrowing conversions, late binding, and certain implicit typing that...

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Easy 5 views

In VB.NET, how do Sub and Function differ?

A Sub performs an operation without returning a value through its declaration, while a Function returns a value of a declared or inferred return type. Both can accept parameters and can have observabl...

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Medium 5 views

How do ByVal and ByRef behave when a VB.NET parameter refers to an object?

ByVal copies the argument value into the parameter. For a reference type, that value is a reference, so the method can still mutate the same object, but reassigning the parameter does not replace the ...

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Medium 4 views

Why should VB.NET file handling use a Using block?

A Using block ensures that a disposable resource is disposed when control leaves the block, including when an exception occurs. This makes file handles available for other operations and avoids cleanu...

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Medium 4 views

A VB.NET desktop application freezes while waiting for a web request. How would you redesign it?

Use a genuinely asynchronous I/O API and Await it from an asynchronous event handler so the UI message loop can continue processing input. Keep longer CPU-bound work off the UI thread where appropriat...

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