DLDevLadder📒 My Notebook

Learn it. Practise it. Crack the interview.

Short lessons with real examples, from basics to advanced — then the questions interviewers actually ask, with the must-know ones marked.

📘Start learningBegin with the fundamentals and go step by step🎯Practise for your role.NET full stack, automation, Industry 4.0 …⏱️10-minute mock testRandom questions against the clock

Learn Programming

Each subject runs from basics to advanced — study the topics left to right. The bar under a tile shows your progress.

Fundamentals

1. How Computers Work
CPUHow Computers & Memory Work
2. Data Structures & Algorithms
DSAData Structures & Algorithms{}Coding Round (DSA)
3. How the Web Works
NETNetworking & Hosting: How the Web Works
4. System Design
HLDSystem Design (HLD)LLDLow-Level Design (LLD)

.NET

1. Languages & Internals
C#C#VBVB.NETCLR.NET Internals: CLR, Memory & GC
2. OOP & Design
OOPOOPSOSOLID PrinciplesDPDesign Patterns
3. Data Access
ADOADO.NETLQLINQEFEntity Framework (EF6 & Core)DpDapper
4. ASP.NET (.NET Framework)
WFASP.NET Web FormsMVC5ASP.NET MVC 5
5. ASP.NET Core
.NModern .NET: Host, Config, DIMVCASP.NET Core MVCAPIASP.NET Core Web API
6. Errors, Logging & UI Components
ErrException Handling & Custom ErrorsLogLogging & Custom LoggingUICustom Controls & Components
7. Architecture & Quality
ArcProject Architecture & FoldersCCClean Code & Unit TestingMSMicroservices & System Design

Database, ETL & BI

1. SQL Server
SQLSQL Server & T-SQLSQLiSQL Server Internals
2. ETL & BI
ETLETL & Data WarehouseISSSISRSSSRS

Cloud & DevOps

1. Web Servers & Hosting
IISIIS & Hosting .NET Apps
2. Source Control
GitGit & GitHub
3. Containers
DkDockerK8sKubernetes
4. Azure & CI/CD
ADOAzure DevOps CI/CDAzMicrosoft AzureAzDBAzure Databases (SQL, Cosmos DB)
5. AWS & GCP
AWSAmazon Web Services (AWS)GCPGoogle Cloud (GCP)

Frontend

1. Web Basics
H5HTML & CSSJSJavaScriptTSTypeScript
2. Node.js
NodeNode.js
3. Libraries & Frameworks
$jQueryA1AngularJS (legacy)NgAngularReReactNxNext.jsVueVue.js

Automation & Industry 4.0

1. Test Automation
QATest Automation
2. Industrial Automation
PLCIndustrial Automation (PLC/SCADA)
3. Industry 4.0
4.0Industry 4.0 & IIoT

Web3 & Blockchain

W3Blockchain & Web3SolSolidity

Interview Questions & Career

1. Question Banks by Role
AllAll Questions — Topic-wiseFS.NET Full Stack DeveloperBEBackend .NET / Web API Developer4.8.NET Framework / Legacy App DeveloperCSFundamentals: DSA, System Design & LLDFEFrontend DeveloperJSNode.js / MERN-MEAN Full Stack DeveloperBISQL Server / BI / ETL DeveloperOpsDevOps / Cloud EngineerQATest Automation (SDET) EngineerPLCIndustrial Automation Engineer4.0Industry 4.0 / IIoT Software EngineerW3Web3 / Blockchain DeveloperTLTeam Lead / Technical LeadHRHR, Behavioural & Salary Round
2. Role Preparation
FS.NET Full Stack Interview
3. HR & Career
HRHR & BehaviouralTLTeam Lead & Agile₹Career Gaps & SalaryCoCompany-wise Prep

Practice

Q&AInterview Q&ATestMock Interview TestCSCheat SheetsDayInterview Day ChecklistMapRoadmap & SyllabusRunDemo Kit (JS & SQL)

DEVLADDER

DevLadder is a free, step-by-step learning path: computer fundamentals, DSA and system design; the whole .NET ecosystem from C# and VB.NET internals to ASP.NET Core; SQL Server and its internals; IIS, Azure, AWS and Google Cloud; Node.js, Next.js, Angular, React and Vue; automation and Industry 4.0. Every course has lessons with examples, interview questions with short bullet-point answers (must-know ones marked), and a one-page cheat sheet.

61 courses · 723 lessons · 1176 interview Q&A · 225 scenario questions · 378 cheat-sheet sections