MCQOPTIONS
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MCQOPTIONS
This section includes 24 Mcqs, each offering curated multiple-choice questions to sharpen your Object Oriented Programming knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If multi-level inheritance is used, First class B inherits class A, then C inherits B and so on. Till how many classes can this go on? |
| A. | Only till class C |
| B. | Only till class J |
| C. | Only till class Z |
| D. | There is no limit |
| Answer» E. | |
| 2. |
How many classes can be inherited by a single class in java? |
| A. | Only 1 |
| B. | Only 27 |
| C. | Only 255 |
| D. | Only 1024 |
| Answer» B. Only 27 | |
| 3. |
How many classes can be inherited by a single class in multiple inheritance (C++)? |
| A. | Only 2 |
| B. | Only 27 |
| C. | Only 1024 |
| D. | Any number of classes can be inherited |
| Answer» E. | |
| 4. |
Which type of inheritance cannot involve private inheritance? |
| A. | Single level |
| B. | Multiple |
| C. | Hybrid |
| D. | All types can have private inheritance |
| Answer» E. | |
| 5. |
In hierarchical inheritance, all the classes involve some kind of inheritance. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
If class A has two nested classes B and C. Class D has one nested class E, and have inherited class A. If E inherits B and C, then ________________ |
| A. | It shows multiple inheritance |
| B. | It shows hierarchical inheritance |
| C. | It shows multiple inheritance |
| D. | Multiple inheritance among nested classes, and single level for enclosing classes |
| Answer» E. | |
| 7. |
If 6 classes uses single level inheritance with pair classes (3 pairs), which inheritance will this be called? |
| A. | Single |
| B. | Multiple |
| C. | Hierarchical |
| D. | Multilevel |
| Answer» B. Multiple | |
| 8. |
Which type of inheritance results in the diamond problem? |
| A. | Single level |
| B. | Hybrid |
| C. | Hierarchical |
| D. | Multilevel |
| Answer» C. Hierarchical | |
| 9. |
How many types of inheritance can be used at a time in a single program? |
| A. | Any two types |
| B. | Any three types |
| C. | Any 4 types |
| D. | Any type, any number of times |
| Answer» E. | |
| 10. |
Which among the following best describes multiple inheritance? |
| A. | Two classes being parent of any other classes |
| B. | Three classes being parent of other classes |
| C. | More than one class being parent of other child classes |
| D. | More than one class being parent of single child |
| Answer» E. | |
| 11. |
How many types of inheritance are possible in C++? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |
| 12. |
Which method in the code below is single level inherited? |
| A. | Class A |
| B. | Class B |
| C. | Class C |
| D. | None |
| Answer» C. Class C | |
| 13. |
Output of following program? |
| A. | B salary is: 4000.0Bonus of B is: 10000 |
| B. | B salary is 10000Bonus of B is: 4000.0 |
| C. | Compile time error |
| D. | Runtime error |
| Answer» B. B salary is 10000Bonus of B is: 4000.0 | |
| 14. |
Which type of inheritance is illustrated by the following code? |
| A. | Single level |
| B. | Multilevel and single level |
| C. | Hierarchical |
| D. | Hierarchical and single level |
| Answer» D. Hierarchical and single level | |
| 15. |
Which among the following is correct for the following code? |
| A. | Multi-level inheritance is used, with nested classes |
| B. | Multiple inheritance is used, with nested classes |
| C. | Single level inheritance is used, with enclosing classes |
| D. | Single level inheritance is used, with both enclosing and nested classes |
| Answer» E. | |
| 16. |
Which class uses hierarchical inheritance in following code? |
| A. | Class A,B,C |
| B. | Class B,C,D |
| C. | Class A,C,D |
| D. | Class D,A,B |
| Answer» E. | |
| 17. |
Which among the following is correct for following code ? |
| A. | Compile time error |
| B. | Runtime error |
| C. | Program runs and o/p is 0 |
| D. | Program runs and o/p is garbage value |
| Answer» B. Runtime error | |
| 18. |
Does following code show multiple inheritance? |
| A. | Yes, class C and class D |
| B. | Yes, All together it’s multilevel |
| C. | No, 4 classes are used |
| D. | No, multiple inheritance is used with class A, B and C |
| Answer» E. | |
| 19. |
Base class _______________ |
| A. | Can be made abstract |
| B. | Can’t be made abstract |
| C. | Must be abstract |
| D. | If made abstract, compile time error |
| Answer» B. Can’t be made abstract | |
| 20. |
If object of lowest level class is created ( last derived class ), _________________ of its parent class constructors are called. |
| A. | Few |
| B. | All |
| C. | Only parent and parent |
| D. | Base and Derived |
| Answer» D. Base and Derived | |
| 21. |
Which among the following is true? |
| A. | Java supports all types of inheritance |
| B. | Java supports multiple inheritance |
| C. | Java doesn’t support multiple inheritance |
| D. | Java doesn’t support inheritance |
| Answer» D. Java doesn’t support inheritance | |
| 22. |
Which among the following is false? |
| A. | If one class inherits the inherited class in single level inheritance, it is multi-level inheritance |
| B. | Hybrid inheritance always contains multiple inheritance |
| C. | Hierarchical inheritance involves inheriting same class into more than one classes |
| D. | Hybrid inheritance can involve any types of inheritance together |
| Answer» C. Hierarchical inheritance involves inheriting same class into more than one classes | |
| 23. |
Which class constructor is called first when an object of derived class is created? |
| A. | Base class constructor |
| B. | Derived class constructor |
| C. | Firstly created derived class constructor |
| D. | Last created derived class constructor |
| Answer» B. Derived class constructor | |
| 24. |
Which among the following is false?$ |
| A. | If one class inherits the inherited class in single level inheritance, it is multi-level inheritance |
| B. | Hybrid inheritance always contains multiple inheritance |
| C. | Hierarchical inheritance involves inheriting same class into more than one classes |
| D. | Hybrid inheritance can involve any types of inheritance together |
| Answer» C. Hierarchical inheritance involves inheriting same class into more than one classes | |