Monitoring — Complete Guide

Monitoring — Complete Guide: free step-by-step lesson with examples, common mistakes, and interview tips — part of ADO.NET Core Tutorial on Toolliyo Academy.

8 min read Updated 8/21/2026

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ADO.NET Core Tutorial · Lesson 88 of 100

Monitoring

Foundations ✓ → SQL & safety ✓ → Production ✓ → Projects

Projects · 4 — Portfolio builds · ~10 min · Module 9: Cloud and DevOps

What is this?

Monitor ADO.NET apps with health checks, metrics, and dependency maps to SQL.

Why should you care?

ShopNest needs SQL marked unhealthy before customers open tickets.

See it live — copy this example

Use a .NET console or API project with SQL Server LocalDB. Run dotnet run after pasting.

builder.Services.AddHealthChecks()
  .AddSqlServer(cs, name: "shopnest-sql");
app.MapHealthChecks("/health");

What happened?

SQL health check.
Alert on unhealthy.
Dashboards for dependency failures.

Practice next

AddSqlServer health.
Probe from orchestrator.
Alert.
Separate ready vs live.
Deep check vs shallow.

Remember

SQL health checks. Orchestrator probes. Alert unhealthy.

ShopNest /health sql

K8s ready fails when SQL down.

Outcome: Traffic shifts off bad pods.

Interview prep for this lesson

Practice these questions aloud after reading—each links to a full structured answer.

Junior PDF Detailed

What is ADO.NET?

Short answer: ADO.NET (Active Data Objects .NET) is a data access technology in the .NET framework that enables applications to interact with databases and other data sources. Explain a bit more It provides a set of clas…

Mid PDF Detailed

Memory Efficiency:?

Short answer: A DataReader is a forward-only, read-only cursor, meaning it streams data from the database and does not store the entire result set in memory. DataSet, on the other hand, loads the entire result set into m…

Mid PDF Detailed

Optimistic Concurrency Control:?

Short answer: Optimistic Concurrency assumes that conflicts will be rare and allows multiple users to read and modify data without locking it. Explain a bit more When updating data, you compare the current data in the da…

Mid PDF Detailed

Using ExecuteReader (for a single row, multiple columns):?

Short answer: SqlCommand command = new SqlCommand("SELECT CustomerName, ContactName FROM Customers WHERE CustomerID = @CustomerID", connection); command.Parameters.AddWithValue("@CustomerID", 1); conn…

Mid PDF Detailed

SqlCommand: Used for SQL Server databases. It represents a Transact-SQL?

Short answer: command or stored procedure. Example: SqlCommand command = new SqlCommand("SELECT * FROM Customers", connection); Example code command or stored procedure. Example: SqlCommand command = new SqlCom…

All course Q&A Practice exams

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