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- Question
Which of the following keywords is used to control access to a class member?
Options- A. Default
- B. Break
- C. Protected
- D. Asm
- Correct Answer
- Protected
- 1. Which of the following can access private data members or member functions of a class?
Options- A. Any function in the program.
- B. All global functions in the program.
- C. Any member function of that class.
- D. Only public member functions of that class. Discuss
- 2. Which of the following means "The use of an object of one class in definition of another class"?
Options- A. Encapsulation
- B. Inheritance
- C. Composition
- D. Abstraction Discuss
- 3. Which of the following is the only technical difference between structures and classes in C++?
Options- A. Member function and data are by default protected in structures but private in classes.
- B. Member function and data are by default private in structures but public in classes.
- C. Member function and data are by default public in structures but private in classes.
- D. Member function and data are by default public in structures but protected in classes. Discuss
- 4. Which of the following two entities (reading from Left to Right) can be connected by the dot operator?
Options- A. A class member and a class object.
- B. A class object and a class.
- C. A class and a member of that class.
- D. A class object and a member of that class. Discuss
- 5. What happens when we try to compile the class definition in following code snippet?
class Birds {}; class Peacock : protected Birds {};
Options- A. It will not compile because class body of Birds is not defined.
- B. It will not compile because class body of Peacock is not defined.
- C. It will not compile because a class cannot be protectedly inherited from other class.
- D. It will compile succesfully. Discuss
- 6. Which of the following statements is correct?
Options- A. Data items in a class must be private.
- B. Both data and functions can be either private or public.
- C. Member functions of a class must be private.
- D. Constructor of a class cannot be private. Discuss
- 7. Which of the following statements is incorrect?
Options- A. Friend keyword can be used in the class to allow access to another class.
- B. Friend keyword can be used for a function in the public section of a class.
- C. Friend keyword can be used for a function in the private section of a class.
- D. Friend keyword can be used on main(). Discuss
- 8. Constructor is executed when _____.
Options- A. an object is created
- B. an object is used
- C. a class is declared
- D. an object goes out of scope. Discuss
- 9. Which of the following statements is correct when a class is inherited privately?
Options- A. Public members of the base class become protected members of derived class.
- B. Public members of the base class become private members of derived class.
- C. Private members of the base class become private members of derived class.
- D. Public members of the base class become public members of derived class. Discuss
- 10. How many objects can be created from an abstract class?
Options- A. Zero
- B. One
- C. Two
- D. As many as we want Discuss
Objects and Classes problems
Search Results
Correct Answer: Any member function of that class.
Correct Answer: Composition
Correct Answer: Member function and data are by default public in structures but private in classes.
Correct Answer: A class object and a member of that class.
Correct Answer: It will compile succesfully.
Correct Answer: Both data and functions can be either private or public.
Correct Answer: Friend keyword can be used on main().
Correct Answer: an object is created
Correct Answer: Public members of the base class become private members of derived class.
Correct Answer: Zero
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