16. If super class and subclass have same variable name, which keyword should be used to use super class?

1. 1. this

   
   
   

   2. classname

   
   
   

   3. super

   
   
   

   4. upper

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   Super keyword is used to access hidden super class variable in subclass.

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17. Static members are not inherited to subclass.

1. 1. return 0

   
   
   

   2. return values

   
   
   

   3. False

   
   
   

   4. True

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   Static members are also inherited to subclasses.

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18. Which of the following is used for implementing inheritance through an interface?

1. 1. extends

   
   
   

   2. inherited

   
   
   

   3. implements

   
   
   

   4. using

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   Interface is implemented using implements keyword. A concrete class must implement all the methods of an interface, else it must be declared abstract.

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19. Which of the following is used for implementing inheritance through class?

1. 1. implements

   
   
   

   2. inherited

   
   
   

   3. using

   
   
   

   4. extends

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   Class can be extended using extends keyword. One class can extend only one class. A final class cannot be extended.

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20. What would be the result if a class extends two interfaces and both have a method with same name and signature?

1. 1. Code runs successfully

   
   
   

   2. First called method is executed successfully

   
   
   

   3. Runtime error

   
   
   

   4. Compile time error

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   In case of such conflict, compiler will not be able to link a method call due to ambiguity. It will throw compile time error.

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