.NET interview questions: – How CAS model is structured under .NET 4.0?

Under .NET 4.0 for CAS there are two major changes are brought in:-

• Permission granting is no more the work of CAS; it’s now the work of the hosting model. In other words CAS is disabled in .NET 4.0 by default. The host will decide what rights to be given to the .NET assembly.

• A new security model i.e. Security transparent model is introduced. The security transparent model puts code in to separate compartments/ boxes as per the risk associated. If you know a code can do something wrong you can compartmentalizethe code as ‘Security transparent’ and if you have a code which you trust you can box them in to ‘Security critical’.

CAS Model

Security transparent code is the code which you feel is unsafe and security safe critical code is the code which you feel is safe and has full access to the system.

Security transparent code cannot call critical code directly, if they have to then they need to go through security safe critical code.

Figure 2.5: – .NET 4.0 CAS model

Also see as detailed video on CAS which explains evidence, permission set & code groups as follows: –


Get more for important .NET interview questions for complete preparation.

Regards,

Refer author’s other blog for complete Most asked .NET interview questions

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One Response to .NET interview questions: – How CAS model is structured under .NET 4.0?

  1. rizzi1234 says:

    thanks for the help.. the article really helped me a lot.. being enrolled in a .net interview course at http://www.wiziq.com/course/46-INTERVIEW-PREPARATION-COURSE-BY-SHIVPRASAD-KOIRALA i was looking for such information available online//

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