6. What is the output of below code snippet?
   

   
   class Z
   {
    
   }
    
   enum Enums extends Z
   {
       DCB, FEG, HIJ, LMN;
   }
   

   
   

1. 1. Compilation Error
      

   
   
   

   2. Runtime Error

   
   
   

   3. It runs successfully

   
   
   

   4. EnumNotDefined Exception

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   Enum types cannot extend class.

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7. What is the output of below code snippet?
   

   
    enum Levels 
   {
       private BOTTOM,
    
       public MEDIUM,
    
       protected TOP;
   }
   

1. 1. Runtime Error
      

   
   
   

   2. EnumNotDefined Exception

   
   
   

   3. Compilation Error

   
   
   

   4. It runs successfully

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   Enum cannot have any modifiers. They are public, static and final by default.

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8. Which of the below data type doesn’t support overloaded methods for +,-,* and /?
   

1. 1. BigDecimal

   
   
   

   2. double

   
   
   

   3. float

   
   
   

   4. int

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   int, float, double provide overloaded methods for +,-,* and /. BigDecimal does not provide these overloaded methods.

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9. Which of the following is the advantage of BigDecimal over double?
   

1. 1. Precision

   
   
   

   2. Garbage creation

   
   
   

   3. Memory usage

   
   
   

   4. Syntax

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   BigDecimal has unnatural syntax, needs more memory and creates great amount of garbage. But it has high precision which is useful for some calculations like money.

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10. Are enums are type-safe?
    

1. 1. 0

   
   
   

   2. 1

   
   
   

   3. True
      

   
   
   

   4. False

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   Enums are type-safe as they have own name-space.

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