.Net Interview

Interviewing candidate for a mid level requires lot of scrutiny to get right candidate.  I had always had list of areas I would like to cover the depth in the area is depends on the candidates interest and experience, but I would like always make sure to know his breadth.  Here is my notes (Crude copy paste from One Note)

1. OOPs
   1. Delegates / Extended Methods
   2. Threading (Pool / TPL / Native) 
   3. Could not differentiate Static and Dynamic poly
   4. Abstract and Interface
   5. Abstract Factory
   6. Virtual, Override
   7. Partial class
2. .Net basics
   1. Reference type, value type
   2. Call by value and call by reference
   3. Why Reflections / Why Garbage Collection & How
3. Collections
1. Stack, Queue
2. Array, Array List
3. Hash table, Dictionary
4. Build & Deployment

Debugging

1. When ASP.Net page is slow how do you respond?

Technology Area

1. ASP.Net (Single sign-on)
   • Cache, Paging
   • Session
   • Application - Global.asax
   • Tracing
   • Error handling
   • Profiling
   • AJAX
   • Configuration
   • HTTPModule & HTTPHandler
   • ASP.Net Pipeline
   • User control, Customer control
   • Authentication, Authorization
   • Member provider
   • Data Binding
2. MVC / MVVM
3. Entity Framework / ORM / LINQ
4. WCF (RIA, OData) / WPF / WF / SL (MEF, Prism)
5. Design Patterns
6. SQL (SSRS, SSIS, SSAS, TSQL)
7. SharePoint (Customization, Performance Point, Power View, Power Pivot)

Designing Skills

• Consider you are building simple Reporting solution to where you need to show data from DB to an UI page.  What are you primary question to estimate & design this app?
• Number of Reports
• Size of data
• Number of users
• Authentication
• Performance needs, Frequency of data change and Caching
• SP vs Dynamic SQL
• AJAX & Pagination

Technical Leadership

• Code Review
• Readability
• Each method one action
• Input validation
• Error Handling
• Performance & Caching
• View State
• Estimation
• Task allocation and tracking

Tools

• Fiddler
• FxCop
• Beyond Compare

Logical Thinking

• Designing lift logic
• Designing Railway platform logic
• Representing hierarchy using Array
• Thread Synchronization
• Tic-Tac -To who to create next move based on current state
• How to you store the state
• Compare two sets
• Process communication