OOPS Concepts problems
- 1. Which of the following is used to make an abstract class?
Options- A. Declaring it abstract using static keyword.
- B. Declaring it abstract using virtual keyword.
- C. Making at least one member function as virtual function.
- D. Making at least one member function as pure virtual function. Discuss
Correct Answer: Making at least one member function as pure virtual function.
- 2. Which of the following concepts means adding new components to a program as it runs?
Options- A. Data hiding
- B. Dynamic typing
- C. Dynamic binding
- D. Dynamic loading Discuss
Correct Answer: Dynamic loading
- 3. Which of the following term is used for a function defined inside a class?
Options- A. Member Variable
- B. Member function
- C. Class function
- D. Classic function Discuss
Correct Answer: Member function
- 4. How "Late binding" is implemented in C++?
Options- A. Using C++ tables
- B. Using Virtual tables
- C. Using Indexed virtual tables
- D. Using polymorphic tables Discuss
Correct Answer: Using Virtual tables
- 5. Which of the following concepts provides facility of using object of one class inside another class?
Options- A. Encapsulation
- B. Abstraction
- C. Composition
- D. Inheritance Discuss
Correct Answer: Composition
- 6. Which of the following functions are performed by a constructor?
Options- A. Construct a new class
- B. Construct a new object
- C. Construct a new function
- D. Initialize objects Discuss
Correct Answer: Initialize objects
- 7. Which one of the following options is correct?
Options- A. Friend function can access public data members of the class.
- B. Friend function can access protected data members of the class.
- C. Friend function can access private data members of the class.
- D. All of the above. Discuss
Correct Answer: All of the above.
- 8. Which of the following factors supports the statement that reusability is a desirable feature of a language?
Options- A. It decreases the testing time.
- B. It lowers the maintenance cost.
- C. It reduces the compilation time.
- D. Both A and B. Discuss
Correct Answer: Both A and B.
- 9. In which of the following a virtual call is resolved at the time of compilation?
Options- A. From inside the destructor.
- B. From inside the constructor.
- C. From inside the main().
- D. Both A and B. Discuss
Correct Answer: Both A and B.
- 10. Which of the following concepts means waiting until runtime to determine which function to call?
Options- A. Data hiding
- B. Dynamic casting
- C. Dynamic binding
- D. Dynamic loading Discuss
Correct Answer: Dynamic binding
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