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Archive for the ‘.NET’ Category

Interview Questions (.NET)

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  1. What’s the difference of using System.Text.StringBuilder over System.String?
    Answer: System.String is immutable. System.StringBuilder was designed with the
    purpose of having a mutable string where a variety of operations can be performed.

  2. What’s the difference between the System.Array.CopyTo() and System.Array.Clone()?
    The Clone() method returns a new array (a shallow copy) object containing all the elements in the original array. The CopyTo() method copies the elements
    into another existing array. Both perform a shallow copy. A shallow copy means the contents (each array element) contains references to the same object as the elements in the original array. A deep copy (which neither of these methods performs) would create a new instance of each element’s object, resulting in a different, yet identical object.

  3. How can you sort the elements of the array in descending order?
    By calling Sort () and then Reverse () methods.
  4. What’s the .NET collection class that allows an element to be accessed using a unique key?

Written by ..alee

December 19, 2006 at 3:54 pm

OO Questions for .NET/Java

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  1. To which is protected class-level variable available to?
    Answer: It is available to any sub-class (a class inheriting this class).
  2. Are private class-levl variables inherited?
    Answer: Yes, but those are not accessible. Although those are not visible or accessible via the class interface, yet those are inherited.
  3. Describe the accessiblilty modifier "protected internal"?
    Answer: It is available to classes that are within the same assembly and derived from specific base class.

Written by ..alee

November 16, 2006 at 3:52 pm