Microsoft 98-372 Online Practice Questions and Exam Preparation

Microsoft 98-372 Online Questions & Answers

• Question 91:

  Which feature protects computers from running untrusted applications?

  A. Code Access security
  B. Role-based security
  C. Evidence-based security
  D. Cryptography
  B. Role-based security

  ---

  Role-Based Security Business applications often provide access to data or resources based on credentials supplied by the user. Typically, such applications check the role of a user and provide access to resources based on that role. The common language runtime provides support for role-based authorization based on a Windows account or a custom identity.

• Question 92:

  What is an advantage of strongly typed code languages like .NET?

  A. Use of efficient type casting.
  B. Use of less memory.
  C. Capturing of errors during compilation.
  D. Improved readability.
  C. Capturing of errors during compilation.

• Question 93:

  You create a class that does not explicitly inherit from any base class. Which is the implied base type of the class?

  A. Void
  B. Type
  C. Object
  D. TypedReference
  C. Object

• Question 94:

  You need to ensure that your console application can process each key as it is pressed. Which method should you use?

  A. Console.OpenStandardlnput
  B. Console.ReadLine
  C. Console.Read
  D. Console.ReadKey
  D. Console.ReadKey

  ---

  The Console.ReadKey method obtains the next character or function key pressed by the user.

• Question 95:

  A type-safe language prevents:

  A. Access to arbitrary memory locations.
  B. Memory leaks.
  C. Null reference exceptions.
  D. Division by zero exceptions.
  A. Access to arbitrary memory locations.

  ---

  Type-safe code accesses only the memory locations it is authorized to access.

• Question 96:

  Type-safe programming languages require that:

  A. Data conversions that might be unsafe are done explicitly.
  B. All data conversions are done implicitly.
  C. Data conversions that might be unsafe are done implicitly.
  D. All data conversions are done explicitly.
  A. Data conversions that might be unsafe are done explicitly.

  ---

  *

  A language is type-safe if the only operations that can be performed on data in the language are those sanctioned by the type of the data.

  *

  Explicit conversions (casts): Explicit conversions require a cast operator. Casting is required when information might be lost in the conversion, or when the conversion might not succeed for other reasons. Typical examples include numeric conversion to a type that has less precision or a smaller range, and conversion of a base-class instance to a derived class.

  Incorrect:

  Not (All data conversions are done implicitly/explicitly):

  In C#, you can perform the following kinds of conversions:

  / Implicit conversions: No special syntax is required because the conversion is type safe and no data will be lost. Examples include conversions from smaller to larger integral types, and conversions from derived classes to base classes.

  / Explicit conversions (casts): Explicit conversions require a cast operator.

  / User-defined conversions.

  / Conversions with helper classes

• Question 97:

  Your application requests FileIOPermission to open a file. The permission is denied.

  Which type of exception will be thrown?

  A. IOException
  B. VerificationException
  C. ArgumentException
  D. SecurityException
  D. SecurityException

  ---

  Example:

  FileIOPermission f = new FileIOPermission(PermissionState.None); f.AllLocalFiles = FileIOPermissionAccess.Read;

  try

  {

  f.Demand();

  }

  catch (SecurityException s)

  {

  Console.WriteLine(s.Message);

  }

• Question 98:

  A base class named MasterData is defined according to the following code segment.

  

  Which code segment should you use to define a method named LoadData that overrides the method in the MasterData class?

  

  B. C. D.
  C

• Question 99:

  You want to raise a custom exception. Which keyword should you use?

  A. Throw
  B. Catch
  C. Finally
  D. Try
  A. Throw

• Question 100:

  Why do managed languages use references and not pointers?

  A. Pointer notation requires more characters than reference notation.
  B. Null pointers can lead to run-time errors.
  C. Pointers are not type-safe.
  D. Pointers are stored by using a fixed amount of memory.
  C. Pointers are not type-safe.

  ---

  Type-safe accesses only the memory locations it is authorized to access, and only in well- defined, allowable ways. Type-safe code cannot perform an operation on an object that is invalid for that object.