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MCSD .NET Implementing Security for Applications with Microsoft Visual C# .NET : 70-340 Exam

Exam Number/Code: 70-340
Exam Name: MCSD .NET Implementing Security for Applications with Microsoft Visual C# .NET
VUE Code: 70-340
Questions Type: Multiple choice,
Real Exam Question Numbers: 30 questions
Exam Language(s): English

“MCSD .NET Implementing Security for Applications with Microsoft Visual C# .NET”, also known as 70-340 exam, is a Microsoft certification.
Preparing for the 70-340 exam? Searching 70-340 Test Questions, 70-340 Practice Exam, 70-340 Dumps?
QUESTION 1:

You are an application developer for Certkiller .com. You develop library assemblies
that are called by your main applications. These library assemblies access
confidential data in the applications. To ensure that this data is not accessed in an
unauthorized and unsafe manner, users must not be allowed to call the library
assemblies from their own applications. You apply a strong name to all assemblies
to support versioning.
You need to prevent users from writing managed applications that make calls to
your library assemblies. You need to achieve this goal while minimizing the impact
on response times for applications.
What should you do?

A. Use the internal access modifier to declare all classes and structures in each library.
B. Use the protected internal access modifier to declare all classes and structures in each
library.
C. Add the following attribute to each class and structure in each library assembly:
PublicKey:="002400..bda4")>
D. Add the following attribute to each class and structure in each library assembly:
PublicKey:="002400..bda4")>

Answer: C

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Explanation:
StrongNameIdentityPermission Class
Defines the identity permission for strong names. This class cannot be inherited.
For a list of all members of this type, see StrongNameIdentityPermission Members.
System.Object
System.Security.CodeAccessPermission
System.Security.Permissions.StrongNameIdentityPermission

NotInheritable Public Class StrongNameIdentityPermission
Inherits CodeAccessPermission
Remarks
Use StrongNameIdentityPermission to achieve versioning and naming protection by
confirming that the calling code is in a particular strong-named code assembly.
A strong name identity is based on a cryptographic public key called a blob optionally
combined with the name and version of a specific assembly. The key defines a unique
namespace and provides strong verification that the name is genuine, because the
definition of the name must be in an assembly signed by the corresponding private key.
Note that the validity of the strong name key is not dependent on a trust relationship or
any certificate necessarily being issued for the key.
Note Full demands for StrongNameIdentityPermission succeed only if all the assemblies
in the stack have the correct evidence to satisfy the demand. Link demands using
StrongNameIdentityPermissionAttribute succeed if only the immediate caller has the
correct evidence.
Demands
You can use the security demand call declaratively or imperatively to specify the
permissions that direct or indirect callers must have to access your library. Direct callers
explicitly call static or instance methods of your library, while indirect callers call static
or instance methods of another library that calls your library. When you use a demand,
any application that includes your code will execute only if all direct and indirect
callers have the permissions that the demand specifies. Demands are particularly
useful in situations in which your class library uses protected resources that you do not
want to be accessed by untrusted code. Demands can be placed in code using either
imperative or declarative syntax.
Note that most classes in the .NET Framework already have demands associated with
them, so you do not need to make an additional demand whenever you use a class that
accesses a protected resource.
Link Demands
A link demand causes a security check during just-in-time compilation and checks only
the immediate caller of your code. Linking occurs when your code is bound to a type
reference, including function pointer references and method calls. If the caller does not
have sufficient permission to link to your code, the link is not allowed and a runtime
exception is thrown when the code is loaded and run. Link demands can be overridden in
classes that inherit from your code.
Just-in-Time compilation
Languages in the .NET Framework compile to Microsoft Intermediate Language (IL)
ready for the JiT (Just-in-Time) compiler to turn them into native code when the program
is installed or first run. The runtime engine pulls in uncompiled functions for compilation
on the fly as required.
With the complete collection of questions and answers, Pass4sure has assembled to take you through 90 questions to your 70-340 Exam preparation. In the 70-340 exam resources, you will cover every field and category in MCSD.NET helping to ready you for your successful Microsoft Certification

Candidates for this exam work on an application development team in a software development environment that uses Microsoft Visual Studio .NET 2003. Candidates have at least three years of experience developing n-tier applications and at least one year of experience using Visual Studio .NET 2003, including ASP.NET and ADO.NET. Candidates have experience developing both Web-based and Microsoft Windows-based applications from start to finish.
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