Interview Q&A

Master technical and career interviews with structured answers—short definition, real examples, pitfalls, and how to answer in 60–90 seconds.

4616 total questions 4516 technical 100 career & HR 4346 from PDF library
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ADO.NET 117 AI Career (2026) 10 ASP.NET Core 260 ASP.NET Core MVC 63 ASP.NET Web API 105 Agile & Scrum 75 Angular 84 Azure DevOps 53 C# Coding Interview 142 C# Collections 108 C# MNC Coding Interview 9 C# OOP 157 Career Growth 10 Design Patterns & SOLID 103 Entity Framework Core 153 Freelancing 10 Gang of Four Patterns 397 Git & GitHub 195 High-Impact Interview Questions 15 Interview Preparation 10 JavaScript 289 Job Change 10 LINQ 223 LinkedIn & Personal Brand 10 Managerial Interview 61 Microservices 816 Microsoft Azure 271 Node.js 123 Notice Period 10 React.js 147 Resume & ATS 10 SQL & Databases 279 Salary Negotiation 10 Unit Testing 101 Work & Office 10
Junior PDF
What is optimistic concurrency?

How to implement it? Assumes conflicts are rare; detects conflicts when saving. Uses concurrency tokens (e.g., timestamp or row version) to detect if data was changed by another process. EF Core throws DbUpdateConcurrenc…

EF Core Read answer
Junior PDF
What is lazy loading proxy? How does the dynamic proxy work under the hood?

EF Core creates a dynamic proxy subclass of your entity at runtime. Proxy overrides virtual navigation properties to load related data on-demand. Requires navigation properties to be virtual and package Microsoft.EntityF…

EF Core Read answer
Junior PDF
What is lazy loading proxy?

How does the dynamic proxy work under the hood? EF Core creates a dynamic proxy subclass of your entity at runtime. Proxy overrides virtual navigation properties to load related data on-demand. Requires navigation proper…

EF Core Read answer

Entity Framework Core Entity Framework Core Tutorial · EF Core

How to implement it?

  • Assumes conflicts are rare; detects conflicts when saving.
  • Uses concurrency tokens (e.g., timestamp or row version) to detect if data was

changed by another process.

  • EF Core throws DbUpdateConcurrencyException if a conflict occurs.
Permalink & share

Entity Framework Core Entity Framework Core Tutorial · EF Core

  • EF Core creates a dynamic proxy subclass of your entity at runtime.
  • Proxy overrides virtual navigation properties to load related data on-demand.
  • Requires navigation properties to be virtual and package

Microsoft.EntityFrameworkCore.Proxies.

  • Proxy intercepts access and triggers loading when property is accessed.
Permalink & share

Entity Framework Core Entity Framework Core Tutorial · EF Core

How does the dynamic proxy work under the hood?

  • EF Core creates a dynamic proxy subclass of your entity at runtime.
  • Proxy overrides virtual navigation properties to load related data on-demand.
  • Requires navigation properties to be virtual and package

Microsoft.EntityFrameworkCore.Proxies.

  • Proxy intercepts access and triggers loading when property is accessed.
Permalink & share
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