MCQOPTIONS
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MCQOPTIONS
This section includes 38 Mcqs, each offering curated multiple-choice questions to sharpen your Java knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
To stop or block inheriting a given class, the ___ keyword is used before the class. |
| A. | static |
| B. | private |
| C. | final |
| D. | none of the above |
| Answer» D. none of the above | |
| 2. |
To control inheritance to different classes and levels, Java provides ____. |
| A. | Return types like the void, int, float, double and other object types |
| B. | Static keyword |
| C. | Access modifiers like default, public, protected, private |
| D. | None |
| Answer» D. None | |
| 3. |
Can you call it a full-fledged inheritance of using ABSTRACT classes and INTERFACES in Java? |
| A. | NO |
| B. | YES |
| C. | - |
| D. | - |
| Answer» B. YES | |
| 4. |
What is the output of the below Java program with inheritance? |
| A. | Sweet=$10 Sugar=$20 |
| B. | Sweet=$10 Sugar=$10 |
| C. | Sweet=$20 Sugar=$20 |
| D. | Compiler error |
| Answer» B. Sweet=$10 Sugar=$10 | |
| 5. |
Which is the keyword used to implement inheritance in Java? |
| A. | extends |
| B. | implements |
| C. | instanceof |
| D. | None |
| Answer» B. implements | |
| 6. |
Find Superclass and Subclass in the below Java program? |
| A. | The Liquid is a superclass and Juice is a subclass. |
| B. | The Liquid is a Subclass and Juice is a Superclass. |
| C. | There is no superclass or subclass |
| D. | None |
| Answer» B. The Liquid is a Subclass and Juice is a Superclass. | |
| 7. |
Find Superclass and Subclass in the below Java code snippet? |
| A. | B is superclass and A is subclass. |
| B. | A is superclass and B is a subclass. |
| C. | There is no superclass or subclass present. |
| D. | None |
| Answer» D. None | |
| 8. |
You can not inherit a Superclass'es constructor even after using inheritance in Java. State TRUE or FALSE. |
| A. | TRUE |
| B. | FALSE |
| C. | - |
| D. | - |
| Answer» B. FALSE | |
| 9. |
A Subclass can become a Superclass to another class extending from it in Java. State TRUE or FALSE. |
| A. | TRUE |
| B. | FALSE |
| C. | - |
| D. | - |
| Answer» B. FALSE | |
| 10. |
When a Class inherits two superclasses (not in Java), it is called ____ inheritance. |
| A. | Multilevel inheritance |
| B. | Single Inheritance |
| C. | Multiple Inheritance |
| D. | None |
| Answer» D. None | |
| 11. |
In a Multi-Level Inheritance in Java, the last subclass inherits methods and properties of ____. |
| A. | Only one immediate Superclass |
| B. | Few classes above it. |
| C. | All classes above it |
| D. | None |
| Answer» D. None | |
| 12. |
In a Multi Level Inheritance Class-C inherits from Class-B and Class-B inherits from Class-A. State TRUE or FALSE. |
| A. | TRUE |
| B. | FALSE |
| C. | - |
| D. | - |
| Answer» B. FALSE | |
| 13. |
In a Single inheritance, Class B inherits only from Class A. State TRUE or FALSE. |
| A. | TRUE |
| B. | FALSE |
| C. | - |
| D. | - |
| Answer» B. FALSE | |
| 14. |
What are the types of Inheritances (Whether Java supports or not) available in Object-Oriented Programming Languages? |
| A. | Single Inheritance |
| B. | Multi-Level Inheritance, Hierarchical Inheritance |
| C. | Multiple Inheritance, Hybrid Inheritance |
| D. | All the above |
| Answer» E. | |
| 15. |
You should use Inheritance when there is an IS-A relationship between classes. State TRUE or FALSE. |
| A. | TRUE |
| B. | FALSE |
| C. | - |
| D. | - |
| Answer» B. FALSE | |
| 16. |
Java language supports ___ type of inheritance. |
| A. | Multiple Inheritance |
| B. | Multi-Level Inheritance |
| C. | - |
| D. | - |
| Answer» C. - | |
| 17. |
The class that inherits an already defined class is called ___. |
| A. | Subclass |
| B. | Superclass |
| C. | - |
| D. | - |
| Answer» B. Superclass | |
| 18. |
The class that is being inherited or subclassed is called ___. |
| A. | Subclass |
| B. | Superclass |
| C. | - |
| D. | - |
| Answer» C. - | |
| 19. |
What are the features reused using Inheritance in Java? |
| A. | Methods |
| B. | Variables |
| C. | Constants |
| D. | All the above |
| Answer» E. | |
| 20. |
What are the features of an Object Oriented Programming (OOPs)? |
| A. | Inheritance |
| B. | Encapsulation |
| C. | Polymorphism |
| D. | All the above |
| Answer» E. | |
| 21. |
What is the output of the below Java program using Inheritance? |
| A. | Added. |
| B. | No output |
| C. | Added. Made of Wood. |
| D. | Compiler error |
| Answer» E. | |
| 22. |
What is the output of the below Java program on the references of Superclass and Subclass? |
| A. | FOOD FOOD FOOD FOOD |
| B. | FOOD FOOD TOASTED FOOD |
| C. | FOOD TOASTED FOOD FOOD |
| D. | Compiler error |
| Answer» C. FOOD TOASTED FOOD FOOD | |
| 23. |
A subclass object can be used to invoke (call) a method or property of the superclass. State TRUE or FALSE. |
| A. | TRUE |
| B. | FALSE |
| C. | - |
| D. | - |
| Answer» B. FALSE | |
| 24. |
A superclass reference can not be used to invoke a method or variable of the subclass. State TRUE or FALSE. |
| A. | TRUE |
| B. | FALSE |
| C. | - |
| D. | - |
| Answer» B. FALSE | |
| 25. |
A Superclass reference can refer to a Subclass Object without casting. State TRUE or FALSE. |
| A. | TRUE |
| B. | FALSE |
| C. | - |
| D. | - |
| Answer» B. FALSE | |
| 26. |
If a class is not subclassed by any class, then defining a default constructor is not mandatory in Java. State TRUE or FALSE. |
| A. | TRUE |
| B. | FALSE |
| C. | - |
| D. | - |
| Answer» B. FALSE | |
| 27. |
What is the output of the below Java program with Constructors using Inheritance? |
| A. | Inside WildAnt() Constructor. |
| B. | Inside Ant(String) Constructor. Inside WildAnt() Constructor. |
| C. | Inside WildAnt() Constructor. Inside WildAnt() Constructor. |
| D. | Compiler error |
| Answer» E. | |
| 28. |
What is the output of the below java program with Constructors and Inheritance? |
| A. | Inside I5Processor() Constructor. Inside I3Processor() Constructor. Inside Processor() Constructor. |
| B. | Inside I5Processor() Constructor. Inside I5Processor() Constructor. Inside I5Processor() Constructor. |
| C. | Inside Processor() Constructor. Inside I3Processor() Constructor. Inside I5Processor() Constructor. |
| D. | Compiler error |
| Answer» D. Compiler error | |
| 29. |
What is the maximum number of levels possible in a Multilevel Inheritance in Java? |
| A. | 8 |
| B. | 16 |
| C. | 32 |
| D. | No maximum level |
| Answer» E. | |
| 30. |
WHICH_ACCESS_TYPE_DATA_GETS_DERIVED_AS_PRIVATE_MEMBER_IN_DERIVED_CLASS:?$ |
| A. | Private |
| B. | Public |
| C. | Protected |
| D. | Protected and Private |
| Answer» B. Public | |
| 31. |
Members which are not intended to be inherited are declared as:$ |
| A. | Public members |
| B. | Protected members |
| C. | Private members |
| D. | Private or Protected members |
| Answer» D. Private or Protected members | |
| 32. |
If_a_base_class_is_inherited_in_protected_access_mode_then_which_among_the_following_is_true?$ |
| A. | Public and Protected members of base class becomes protected members of derived class |
| B. | Only protected members become protected members of derived class |
| C. | Private, Protected and Public all members of base, become private of derived class |
| D. | Only private members of base, become private of derived class |
| Answer» B. Only protected members become protected members of derived class | |
| 33. |
While_inheriting_a_class,_if_no_access_mode_is_specified,_then_which_among_the_following_is_true?_(in_C++) |
| A. | It gets inherited publicly by default |
| B. | It gets inherited protected by default |
| C. | It gets inherited privately by default |
| D. | It is not possible |
| Answer» D. It is not possible | |
| 34. |
Which programming language doesn’t support multiple inheritance?$ |
| A. | C++ and Java |
| B. | C and C++ |
| C. | Java and SmallTalk |
| D. | Java |
| Answer» E. | |
| 35. |
B,E |
| A. | A,C |
| B. | C,E |
| C. | T,H |
| Answer» D. | |
| 36. |
Which of these is correct way of inheriting class A by class B? |
| A. | class B + class A {} |
| B. | class B inherits class A {} |
| C. | class B extends A {} |
| D. | class B extends class A {} |
| Answer» D. class B extends class A {} | |
| 37. |
A class member declared protected becomes a member of subclass of which type? |
| A. | public member |
| B. | private member |
| C. | protected member |
| D. | static member |
| Answer» C. protected member | |
| 38. |
Which of this keyword must be used to inherit a class? |
| A. | super |
| B. | this |
| C. | extent |
| D. | extends |
| Answer» E. | |