Interview Questions 2025

Mock database

various best practices we use while creating Api

create a generic repository code

reverse words in a string Statement

policy while creating yaml file

how will you truble shoot the auth issue when your are unable to connect with key vault

Use case for liskov substitution principle

Async programming

Verious caching strategies

How to stop async method

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🏗️ Deep Dive: Understanding Every Concept in Microsoft Entra API Onboarding for .NET Developers

When working with Microsoft Entra (formerly Azure Active Directory), you’ll hear terms like App Registration, Tenant, Client ID, Audience, Scopes, Roles, Tokens, OBO flow , and more. If you’re new, it can feel overwhelming. This guide breaks down every key term and concept , with definitions, examples, and how they connect when you onboard and consume a new API. 🔹 1. Tenant Definition : A tenant in Entra ID is your organization’s dedicated, isolated instance of Microsoft Entra. Think of it like : Your company’s identity directory. Example : contoso.onmicrosoft.com is a tenant for Contoso Ltd. 🔹 2. App Registration Definition : The process of registering an application in Entra to give it an identity and permission to use Microsoft identity platform. Why needed : Without registration, Entra doesn’t know about your app. What it creates : Application (Client) ID – unique identifier for your app Directory (Tenant) ID – your organization’s ID Types of apps : Web ...

🗑️ Garbage Collection & Resource Management in .NET (C#) — Beginner Friendly Guide

When you start working with .NET and C#, one of the biggest advantages is that you don’t need to manually manage memory like in C or C++. The Garbage Collector (GC) does most of the work for you. But here’s the catch — not everything is managed automatically. Some resources like files, database connections, sockets, and native memory still need special handling. This blog will help you understand: ✔ How the GC works ✔ What are managed vs unmanaged resources ✔ The difference between Dispose , Finalize , and using ✔ The Dispose pattern with examples ✔ Best practices every C# developer should know 1) How Garbage Collection Works in .NET Managed resources → Normal .NET objects (string, List, etc.). GC frees them automatically. Unmanaged resources → External resources like file handles, database connections, sockets, native memory. GC cannot clean them up — you must do it. 👉 GC uses a Generational Model for performance: Gen 0 : Short-lived objects (local variables, t...

☁️ Azure Key vault Short Notes

🟢 What is Azure Key Vault? A cloud service for securely storing and accessing secrets, keys, and certificates . Removes the need to keep secrets (like connection strings, passwords, API keys) inside code or config files. Provides centralized secret management, encryption, and access control . 👉 Think of it like a secure password manager but for your applications. 🟢 Key Features Secrets → store text values (e.g., DB connection string, API key). Keys → store cryptographic keys (RSA, EC) for encryption, signing. Certificates → store/manage SSL/TLS certificates. Access Control → Access Policies (older model). Azure RBAC (modern, preferred). Integration → works with App Service, Functions, AKS, VMs, SQL DB, etc. Logging → audit who accessed secrets via Azure Monitor / Diagnostic Logs. 🟢 Why Use Key Vault? Security → secrets are encrypted with HSM (Hardware Security Modules). Compliance → meet industry standards (PCI-DSS, ISO, GDPR). Automation → aut...

C# Warrior : Learn .NET Core Basic To Advance

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