C++ MCQs with answers Page - 117

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Q. Which of the following is not a correct statement?

  • (A) Every class containing abstract method must be declared abstract.
  • (B) Abstract class can directly be initiated with ‘new’ operator.
  • (C) Abstract class can be initiated.
  • (D) Abstract class does not contain any definition of implementation.

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Q. When a method in a subclass has the same name and type signatures as a method in the superclass, then the method in the subclass _____ the method in the superclass.

  • (A) Overloads
  • (B) Friendships
  • (C) Inherits
  • (D) Overrides

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Q. When one object reference variable is assigned to another object reference variable then

  • (A) a copy of the object is created.
  • (B) a copy of the reference is created.
  • (C) a copy of the reference is not created.
  • (D) it is illegal to assign one object reference variable to another object reference variable.

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Q. Which of the following is not a member of class?

  • (A) Static function
  • (B) Friend function
  • (C) Const function
  • (D) Virtual function

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Q. How can we restrict dynamic allocation of objects of a class using new?

  • (A) By overloading new operator
  • (B) By making an empty private new operator.
  • (C) By making an empty private new and new[] operators
  • (D) By overloading new operator and new[] operators

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Q. Which of the following operators cannot be overloaded?

  • (A) . (Member Access or Dot operator)
  • (B) ?: (Ternary or Conditional Operator)
  • (C) :: (Scope Resolution Operator)
  • (D) All of the above

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Q. Which of the following operators are overloaded by default by the compiler in every user defined classes even if user has not written? 1) Comparison Operator (==) 2) Assignment Operator (=)

  • (A) Both 1 and 2
  • (B) Only 1
  • (C) Only 2
  • (D) None of the two

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Q. Which of the following operators should be preferred to overload as a global function rather than a member method?

  • (A) Postfix ++
  • (B) Comparison Operator
  • (C) Insertion Operator <<
  • (D) Prefix++

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Q. How C++ compiler does differ between overloaded postfix and prefix operators?

  • (A) C++ doesn’t allow both operators to be overloaded in a class
  • (B) A postfix ++ has a dummy parameter
  • (C) A prefix ++ has a dummy parameter
  • (D) By making prefix ++ as a global function and postfix as a member function.

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Q. Which of the following operator functions cannot be global?

  • (A) new
  • (B) delete
  • (C) Conversion Operator
  • (D) All of the above

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