Microsoft 98-372 Online Practice Questions and Exam Preparation

Microsoft 98-372 Online Questions & Answers

• Question 201:

  The Common Language Specification (CLS) standard:

  A. Defines a common development environment for writing applications.
  B. Allows code written in different languages to interact.
  C. Defines a common syntax for all programming languages.
  D. Allows code written for a desktop application to run as a web application.
  B. Allows code written in different languages to interact.

• Question 202:

  You write a method named DoWork.

  You need to log all exceptions that occur inside DoWork. You also need to ensure that all exceptions are raised to the calling code.

  Which code segment should you use?

  

  A. Option A
  B. Option B
  C. Option C
  D. Option D
  C. Option C

• Question 203:

  You create a class that uses unmanaged resources.

  You need to ensure that users of the class can explicitly release resources when the instance of the class is no longer required.

  Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

  A. Use a class destructor that is called from within the Dispose method.
  B. Implement the IDisposable interface.
  C. Inherit from the WeakReference class.
  D. Use a class destructor that calls the Kill method.
  A. Use a class destructor that is called from within the Dispose method.
  B. Implement the IDisposable interface.

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  To properly dispose of unmanaged resources, it is recommended that you implement a public Dispose or Close method that executes the necessary cleanup code for the object. The IDisposable interface provides the Dispose method for resource classes that implement the interface. Because it is public, users of your application can call the Dispose method directly to free memory used by unmanaged resources. When you properly implement a Dispose method, the Finalize method becomes a safeguard to clean up resources in the event that the Dispose method is not called.

  Reference: Cleaning Up Unmanaged Resources

• Question 204:

  Which type of casting enforces type safety?

  A. Reinterpret
  B. Implicit static
  C. Explicit static
  D. Explicit dynamic
  C. Explicit static

• Question 205:

  You create an unmanaged object and use the object. You no longer need the object. What should you do?

  A. Set the value of the variable to null.
  B. Cache the variable's value in a static variable.
  C. Cast the object to its base type.
  D. Dispose the object to release memory.
  D. Dispose the object to release memory.

  ---

  The term "unmanaged resource" is usually used to describe something not directly under the control of the garbage collector. For example, if you open a connection to a database server this will use resources on the server (for maintaining the connection) and possibly other non-.net resources on the client machine, if the provider isn't written entirely in managed code.

  This is why, for something like a database connection, it's recommended you write your code thusly:

  using (var connection = new SqlConnection("connection_string_here")) { // Code to use connection here } As this ensures that .Dispose() is called on the connection object, ensuring that any unmanaged resources are cleaned up.

• Question 206:

  What is the purpose of strong naming?

  A. To ensure that only one version of an assembly is stored in a directory at any point in time.
  B. To manage the references of the file list in an assembly's manifest.
  C. To assign a globally unique key to the assembly.
  D. To impose restrictions on how different data types are defined within an assembly.
  C. To assign a globally unique key to the assembly.

• Question 207:

  In the Common Language Runtime (CLR), what information is used to make decisions on security policy?

  A. Evidence
  B. Cryptography
  C. Code group
  D. Permissions
  A. Evidence

  ---

  The Evidence class defines the set of information that constitutes input to security policy decisions.

  Note: Common forms of evidence include signatures and location of origin of code, but can potentially be anything. Objects of any type that are recognized by security policy represent evidence.

• Question 208:

  Which should you use to call a class written in C# from a program written in Microsoft Visual Basic .NET?

  A. The Visual Basic .NET syntax
  B. The Windows Communication Foundation (WCF) API
  C. A Component Object Model (COM) interface
  D. The C# syntax
  A. The Visual Basic .NET syntax

• Question 209:

  Which three actions can you perform by using the Strong Name tool? (Choose three.)

  A. Create a key pair for an assembly.
  B. Compile the assembly for the first time.
  C. Encrypt an assembly.
  D. Re-sign a previously signed assembly.
  E. Extract the public key from an assembly.
  A. Create a key pair for an assembly.
  D. Re-sign a previously signed assembly.
  E. Extract the public key from an assembly.

  ---

  A: sn -a identityKeyPairFile signaturePublicKeyFile

  Generates AssemblySignatureKeyAttribute data to migrate the identity key to the signature key from a file.

  D: sn - R[a] assembly infile

  Re-signs a previously signed or delay-signed assembly with the key pair in infile. If -Ra is used, hashes are recomputed for all files in the assembly.

  E: Sn -e assembly outfile

  Extracts the public key from assembly and stores it in outfile.

  * The Strong Name tool (Sn.exe) helps sign assemblies with strong names. Sn.exe provides options for key management, signature generation, and signature verification.

• Question 210:

  Which three policy types are .NET security policy levels? (Choose three.)

  A. Enterprise policy
  B. Data policy
  C. Network policy
  D. Machine policy
  E. Application domain policy
  A. Enterprise policy
  D. Machine policy
  E. Application domain policy

  ---

  The following table describes the four security policy levels provided by .NET Framework security.

  *

  Enterprise policy

  All managed code in an enterprise setting where an enterprise configuration file is distributed.

  *

  Machine policy

  All managed code on the computer.

  *

  User policy

  Code in all the processes associated with the current operating system user when the common language runtime starts.

  *

  Application domain policy

  Managed code in the host's application domain