C++ MCQs with answers Page - 97

Here, you will find a collection of MCQ questions on C++. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. Under which of the following circumstances, synchronization takes place?

  • (A) When the file is closed
  • (B) When the buffer is empty
  • (C) Explicitly, with manipulators
  • (D) Both A and C

A

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Q. What is deep copy?

  • (A) A deep copy creates a copy of the dynamically allocated objects too
  • (B) A deep copy just copies the values of the data as they are
  • (C) A deep copy creates a copy of the statically allocated objects too
  • (D) Both B and C

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Q. If the class name is X, what is the type of its “this” pointer (in a non-static, non-const member function)?

  • (A) const X* const
  • (B) X* const
  • (C) X*
  • (D) X&

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Q. Which one of the following is not a valid reserved keyword in C++

  • (A) Explicit
  • (B) Public
  • (C) Implicit
  • (D) Private

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Q. Which of the following relationship is known as inheritance relationship?

  • (A) ‘has-a’ relationship
  • (B) ‘is-a’ relationship
  • (C) Association relationship
  • (D) None of the above

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Q. Vtables

  • (A) Creates a static table per class
  • (B) Creates a static table per object
  • (C) Creates a dynamic table per class
  • (D) Creates a dynamic table per object

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Q. When class B is inherited from class A, what is the order in which the constructers of those classes are called?

  • (A) Class A first Class B next
  • (B) Class B first Class A next
  • (C) Class B’s only as it is the child class
  • (D) Class A’s only as it is the parent class

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Q. What’s wrong? (x = 4 && y = 5) ? (a = 5) ; (b = 6);

  • (A) The question mark should be an equal sign
  • (B) The first semicolon should be a colon
  • (C) There are too many variables in the statement
  • (D) The conditional operator is only used with apstrings

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Q. What is shallow copy?

  • (A) A shallow copy creates a copy of the dynamically allocated objects too
  • (B) A shallow copy just copies the values of the data as they are
  • (C) A shallow copy creates a copy of the statically allocated objects too
  • (D) Both b and c above

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Q. Which of the following is not a component of file system?

  • (A) Access method
  • (B) Auxiliary storage management
  • (C) Free integrity mechanism
  • (D) None of the above

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