. Net interview questions (BS)

Solutions and ideas:

Design and strategy:

1. I have purchased an item from a website. Assume that many users (assuming 10000 people) are buying an item and there are only 10 items in stock. How can I design a system to support this scenario?

2. How do you design a user center that stores user names and passwords and other basic information? (Think about security, performance, expansion, high availability, etc ..)

3. Front-end (html http, etc. ..) Optimization Strategy

4. Performance Optimization policies for application servers (mainly Asp.net)

5. Internet applicationsProgramCommon security risks and Solutions

6. design mode (generally, the simplest single-piece mode is implemented in C)

7. How to ensure the quality of your software/product

Troubleshooting:

1.if w3wp.exe cpu100%is found for a web server in the production environment, how can this problem be solved?

2. There is a simple Asp.net Development page (News list). The user reports that it is very slow to open this page. How can this problem be solved?

Technical basics:

1. Types and Basic Concepts

1.1 attribute and property

1.2 abstract classes and interfaces

1.3 class inheritance

1.4 What is delegate

1.5 LINQ or lambda expressions

1.6 briefly describe the closure (C # or Javascript)

2. String

1.1 What is the string type (what is the main difference between the value type and the reference type? Packing and unpacking)

1.2 "111" = "222" internal implementation? (String comparison)

What is the default encoding of the string in 1.3. Net?

1.4. Net's String Structure

3. Lock and Multithreading

1.1 briefly describe lock (next, ask you about the lock () object and why)

1.2 multithreading, thread pool and Parallel library

1.3 multi-thread synchronization methods and advantages and disadvantages

1.4 Performance and deadlock Problems

4. Database (SQL Server)

1.1 differences between inner join and left join

1.2 index in SQL Server

1.3 SQL Server locks

1.4 How to troubleshoot and improve the performance of SQL statements

Processing of 1.5 large data volumes

5. Front-end

1.1 What is doctype used in HTML?

1.2 several simple methods and usage of jquery

1.3 HTTP status code

1.4 JavaScript (DOM) Memory leakage

6. SimpleAlgorithm(Only when the interviewer says he is good at this)

1.1 algorithms you know or know

1.2 What algorithm do you usually use for sorting? Why?

1.3 Specific algorithm questions generally only require ideas (usually very simple, bucket sorting or merging)

7. Some Technologies and concepts

1.1 comparison between Asp.net MVC and traditional methods

1.2 Brief description of entiry framework, comparison with the traditional mode

1.3 comparison between WCF and traditional modes, such as remoting service and Web Service

1.4 usage of some third-party class libraries

1.5 have components or underlying class libraries been developed?

1.6 What is the difference between IIS6 and iis7?

Non-technical:

1. A new project is handed over to you, but you still don't know about the technology. The boss said that this project will be completed next week. What will you do now?

2. A project you are in charge of will be launched next week, but the Operation Department said that the server will not be ready for you next week. What will you do?