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About the test

The VB.NET online test assesses candidates' knowledge of programming in the VB.NET language and their ability to leverage commonly used parts of the .NET framework's class library.

It's an ideal test for pre-employment screening. A good VB.NET developer needs to be able not only to solve problems using VB.NET but also recognize when to leverage the functionality provided by the .NET framework's class library to write robust and maintainable code.

This online test requires candidates to solve coding problems in VB.NET and find and fix bugs in a VB.NET program.

Sample public questions

Easy
10 min
code
Public
VB.NET
Arrays

Implement the UniqueNames method. When passed two arrays of names, it will return an array containing the names that appear in either or both arrays. The returned array should have no duplicates.

For example, calling MergeNames.UniqueNames({'Ava', 'Emma', 'Olivia'}, {'Olivia', 'Sophia', 'Emma'}) should return an array containing Ava, Emma, Olivia, and Sophia in any order.

Easy
15 min
code
Public
VB.NET
Inheritance
OOP

User interface contains two types of user input controls: TextInput, which accepts all characters and NumericInput, which accepts only digits.

Implement the class TextInput that contains:

  • Public sub Add(c As Char) - adds the given character to the current value
  • Public function GetValue() As String - returns the current value

Implement the class NumericInput that:

  • Inherits TextInput
  • Overrides the Add method so that each non-numeric character is ignored

For example, the following code should output "10":

Dim input As TextInput = New NumericInput()
input.Add(CChar("1"))
input.Add(CChar("a"))
input.Add(CChar("0"))
Console.WriteLine(input.GetValue())

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Skills and topics tested

  • VB.NET
  • Arithmetic
  • Dictionary
  • Iteration
  • Lists
  • Regex
  • Strings
  • Serialization
  • XML
  • LINQ

For job roles

  • .NET Developer
  • Back-End Developer
  • VB.NET Developer
  • Web Developer

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