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  • Question
  • Which of the following statements is correct?


  • Options
  • A. The conditional logical operators cannot be overloaded.
  • B. When a binary operator is overloaded the corresponding assignment operator, if any, must be explicitly overloaded.
  • C. We can use the default equality operator in an overloaded implementation of the equality operator.
  • D. A public or nested public reference type does not overload the equality operator.
  • E. The array indexing operator can be overloaded.

  • Correct Answer
  • The conditional logical operators cannot be overloaded. 


  • Polymorphism problems


    Search Results


    • 1. Which of the following statements is correct?

    • Options
    • A. Only one object can be created from an abstract class.
    • B. By default methods are virtual.
    • C. If a derived class does not provide its own version of virtual method then the one in the base class is used.
    • D. If the method in the derived class is not preceded by override keywords, the compiler will issue a warning and the method will behave as if the override keyword were present.
    • E. Each derived class does not have its own version of a virtual method.
    • Discuss
    • 2. Which of the following statements is correct?

    • Options
    • A. When used as a modifier, the new keyword explicitly hides a member inherited from a base class.
    • B. Operator overloading works in different ways for structures and classes.
    • C. It is not necessary that all operator overloads are static methods of the class.
    • D. The cast operator can be overloaded.
    • Discuss
    • 3. Which of the following keyword is used to change the data and behavior of a base class by replacing a member of a base class with a new derived member?

    • Options
    • A. new
    • B. base
    • C. overloads
    • D. override
    • E. overridable
    • Discuss
    • 4. Which of the following statement is correct about the C#.NET code snippet given below?

      public class Sample
      {
          public int x;
          public virtual void fun()
          { }
      }
      public class DerivedSample : Sample
      {
          new public void fun()
          { }
      }

    • Options
    • A. DerivedSample class hides the fun() method of base class.
    • B. The DerivedSample class version of fun() method gets called using Sample class reference which holds DerivedSample class object.
    • C. The code replaces the DerivedSample class version of fun() method with its Sample class version.
    • D. It is not possible to hide Sample class version of fun() method without use of new in DerivedSample class.
    • Discuss
    • 5. Which of the following operators cannot be overloaded?

      1. true
      2. false
      3. new
      4. ~
      5. sizeof

    • Options
    • A. 1, 3
    • B. 2, 4
    • C. 3, 5
    • D. All of the above
    • Discuss
    • 6. Which of the followings is the correct way to overload + operator?

    • Options
    • A.
      public sample operator + ( sample a, sample b )
    • B.
      public abstract operator + ( sample a, sample b)
    • C.
      public abstract sample operator + (sample a, sample b )
    • D.
      public static sample operator + ( sample a, sample b )
    • E. All of the above
    • Discuss
    • 7. Which of the following keyword is used to overload user-defined types by defining static member functions?

    • Options
    • A. op
    • B. opoverload
    • C. operator
    • D. operatoroverload
    • E. udoperator
    • Discuss
    • 8. Which of the following are necessary for Run-time Polymorphism?

      1. The overridden base method must be virtual, abstract or override.
      2. Both the override method and the virtual method must have the same access level modifier.
      3. An override declaration can change the accessibility of the virtual method.
      4. An abstract inherited property cannot be overridden in a derived class.
      5. An abstract method is implicitly a virtual method.

    • Options
    • A. 1, 3
    • B. 1, 2, 5
    • C. 2, 3, 4
    • D. 4 only
    • Discuss
    • 9. Which of the following can be declared as a virtual in a class?

      1. Methods
      2. Properties
      3. Events
      4. Fields
      5. Static fields

    • Options
    • A. 1, 2, 3
    • B. 3, 5
    • C. 2, 4
    • D. 2, 3, 5
    • Discuss
    • 10. Which of the following statements are correct about a HashTable collection?

      1. It is a keyed collection.
      2. It is a ordered collection.
      3. It is an indexed collection.
      4. It implements a IDictionaryEnumerator interface in its inner class.
      5. The key - value pairs present in a HashTable can be accessed using the Keys and Values properties of the inner class that implements the IDictionaryEnumerator interface.

    • Options
    • A. 1 and 2 only
    • B. 1, 2 and 3 only
    • C. 4 and 5 only
    • D. 1, 4 and 5 only
    • E. All of the above
    • Discuss


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