C++ MCQs with answers Page - 76

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Q. Classes that can be used to instantiate objects are called?

  • (A) abstract class
  • (B) concrete classes
  • (C) interface
  • (D) None of the above

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Q. Which of the following is true?

  • (A) The C++ interfaces are implemented using abstract classes
  • (B) The purpose of an abstract class is to provide an appropriate base class from which other classes can inherit
  • (C) Abstract classes cannot be used to instantiate objects and serves only as an interface.
  • (D) All of the above

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Q. Where does the abstract class is used?

  • (A) derived class
  • (B) base class only
  • (C) both derived & base class
  • (D) virtual class

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Q. Which class is used to design the base class?

  • (A) erived class
  • (B) abstract class
  • (C) base class
  • (D) derived & base class

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Q. We cannot make an instance of an abstract base class

  • (A) FALSE
  • (B) TRUE
  • (C) Can be true and false
  • (D) none of these

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Q. Which is the correct syntax of defining a pure virtual function?

  • (A) virtual return_type func();
  • (B) virtual return_type func() = 0;
  • (C) virtual return_type func() pure;
  • (D) pure virtual return_type func();

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Q. Which is the correct statement about pure virtual functions?

  • (A) Pure virtual function cannot implemented in derived classes
  • (B) Pure virtual function is implemented in derived classes
  • (C) Pure keyword should be used to declare a pure virtual function
  • (D) They should be defined inside a base class

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Q. The default value of the static variable is:

  • (A) -1
  • (B) 0
  • (C) 1
  • (D) 2

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Q. Reusability of code can be achieved in CPP through:

  • (A) class
  • (B) Encapsulation
  • (C) Inheritance
  • (D) Object

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Q. C++ programming language follow______ programming approach:

  • (A) up
  • (B) Down
  • (C) Bottom-up
  • (D) Top-down

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