OOPs Interview Question and Answers

31. What are the three ways to perform string comparison in C#?
  In C#, there are three ways to perform the string comparison.
  • Using Compare () method.
  • Using Equals () method.
  • Using = = operator.
 
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32. What is the difference between field and methods?
 
  • Fields - Variables declared in the class to hold data.
  • Methods- Function members defined in the class. Used to implement the computations and actions to be performed.
 
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33. What is the use of base keyword?
 
  • A subclass constructor is used to construct the instance variables of both the derived class and the base class.
  • The subclass constructor uses the keyword base to invoke the constructor method of the super class.
 
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34. Define Mutable string?
  A destructor is a mechanism to release the resources when an object is reclaimed by the garbage collector.
The name of the destructor is the same as the class name and is preceded by a tilde (~).
 
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35. Define Immutable String?
 
  • Characters contained in the strings are not modified.
  • Created using system.string class.
 
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