.NET (Core and Framework)

Hi Programmers,

Have you ever practiced coding online to prepare a technical interview or to groom your skills? If yes, how well it was? Which websites have you used? And, how effective they were? If possible, share the challenges you have faced?

Dim text2 As String = ""
Dim num As Integer = 1
Dim num2 As Integer
Dim num3 As Integer
Do
    ' The following expression was wrapped in a unchecked-expression
    Dim value As Integer = CInt(Math.Round(Math.Floor(CDbl((10.0F * VBMath.Rnd())))))
    text2 += Conversions.ToString(value)
    num += 1
    num2 = num
    num3 = 8
Loop While num2 <= num3

protected void GetArticleCount()
{
    ArticlesManager articlesManager = new ArticlesManager();
    ViewBag.ArticlesCount = articlesManager.ArticleCount();
}

var t1 = Task.Factory.StartNew(() => GetArticleCount());
var t2 = Task.Factory.StartNew(() => GetBrancheCount());
var t3 = Task.Factory.StartNew(() => GetCompaniesCount());
var t4 = Task.Factory.StartNew(() => GetDeliveriesCount());
var t5 = Task.Factory.StartNew(() => GetDistributionCentresCount());
var t6 = Task.Factory.StartNew(() => GetDocksCount());
var t7 = Task.Factory.StartNew(() => GetInvoicesCount());
var t8 = Task.Factory.StartNew(() => GetOrdersCount());

var taskList = new List<Task> { t1, t2, t3, t4, t5, t6, t7, t8 };
Task.WaitAll(taskList.ToArray());