• OOP (You really have to be good at OOP, you should be able to answer questions like the following)
  • What’s the importance of OOP?
  • What’re the four basic principles of OOP?
  • What’s Polymorphism? What’s its importance? Give an example.
  • What’re the two types of Inheritance?
  • What’s the difference between Abstract and Interface classes
  • What’re the 3 types of access modifiers?
  • What’s the Sealed Class?
  • … and more.
• General Web Concepts
  • Differences between internet protocols (http, https, ftp, …)
  • Differences between Sessions and Cookies.
  • Response codes and what each code means? (ie. 404 means Page Not Found, there’re many others)
  • What’s the difference between POST and GET methods?
• HTML
  • What’re the tags you can use? what’re the attributes you can give to them? and what’re the possible values of those attributes?
  • What’s new in HTML5?
  • w3schools tutorial for HTML/ HTML5
• JScript/JQuery
  • What’s powerful of JQuery?
  • Ajax and data transfer types (JSON, XML, …)
  • JQ-UI library (give a look)
  • w3schools tutorials for
    • Javascript
    • JQuery
• CSS (Just give a look)
  • What’re the 3 types of styling.
  • What’re the style attributes and their possible values?
  • What’s new in CSS3?
  • wschools tutorial for CSS and CSS3
• SQL
  • Relations
  • Constraints (Different types of key, Primary, Unique, Composite, …)
  • Designs, train to make good designs.
  • Given a design, how to make queries on that design (Train very well)
    • Different types of JOINs.
    • Nested SELECT
    • Aggregate functions
    • Difference between WHERE and HAVING
  • Normalization rules (Just give a look and know the concepts)
    • Wikipedia explanation for Normalizations
  • Denormalization, When may we need to denormalize a design?
  • Different SQL datatypes. When should we use each?
  • What’re the different solutions when we have very big amount of data (Giga/Tera bytes) (one solution is indexing, but not the only one)
  • SQL Server (Authentication modes, Instances, Security and Users) (Not very important)
  • w3schools tutorial for SQL
• ASP
  • DB Models (Entity Framework or LINQ to SQL)
  • Services (WCF)
  • Repeaters
  • Update panels and Script managers
  • asp Controls (Textbox, DropDownList, Button, …)
  • The life cycle of the asp Page
  • asp Controls (.ascx)
  • ViewState
  • Localization (Global and Local resources)
  • w3schools for ASP
• Others
  • Browsers developer tools
    • IE, Chrome and Firefox, the three of them offer awesome developer tools
      • JS debuggers (Visual studio debugger for JS is really awesome)
      • HTML Page 3D Visualization (Firefox)
      • Console window for writing and executing scripts at runtime (without editing the source code)
      • Network window for checking and debugging requests and responses data.
    • Usage of alerts and console logs

Those are the very basic concepts and topics that should be studied before applying for an ASP position, I hope that helps : )