C++ MCQs with answers Page - 81

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Q. String class have a concat() function that is used to

  • (A) Remove a string from end of one string
  • (B) Append one string at end of another string
  • (C) Add two strings
  • (D) Replace old string by new string

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Q. Which among the following is/are type(s) of this pointer?

  • (A) int
  • (B) volatile
  • (C) const
  • (D) const or volatile

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Q. Which is the pointer which denotes the object calling the member function?

  • (A) Zero pointer
  • (B) Null pointer
  • (C) This pointer
  • (D) Variable pointer

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Q. Which property is shown most when upcasting is used?

  • (A) Encapsulation
  • (B) Complex code simple syntax
  • (C) Code efficiency
  • (D) Code reusability

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Q. If multiple inheritance is implemented, which upcasting will be correct?

  • (A) Upcast is not possible
  • (B) Upcast to send base class listed in inheritance
  • (C) Upcast to any base class
  • (D) Upcast to first base class listed in inheritance

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Q. When are the pointer types known for upcasting the objects?

  • (A) Compile time
  • (B) Runtime
  • (C) Source code build time
  • (D) Doesn’t apply to pointer types

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Q. Which container provides random access iterators?

  • (A) sort
  • (B) vector
  • (C) deque
  • (D) both vector & deque

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Q. Which among the following is a mandatory condition for downcasting?

  • (A) It can’t be done explicitly
  • (B) It must be done explicitly
  • (C) It must be done implicitly
  • (D) It must not be done explicitly

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

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

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

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

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