46. What is the value of “n” after this line of code has been executed?
    

    double n = Math.round ( 4.5 + Math.random() );
    

1. 1. 1

   
   
   

   2. 2

   
   
   

   3. 3

   
   
   

   4. 4

   
   
   

   5. 5

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: E

   The Math.random() method returns a number greater than or equal to 0 and less than 1. so 4.5 will be greater than or equal to 4.5 and less than 5.5, we can be sure that Math.round() will round that number to 5.

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47. Which of these class encapsulate the runtime state of an object or an interface?

1. 1. Object

   
   
   

   2. Class

   
   
   

   3. System

   
   
   

   4. Runtime

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   Class

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48. Which of these classes can schedule task for execution in future?
    

1. 1. Timer

   
   
   

   2. Observer

   
   
   

   3. Thread

   
   
   

   4. System

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   Timer and TimerTask are the classes that support the ability to schedule tasks for execution at some future time.

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49. Which of these method is a rounding function of Math class?

1. 1. abs()

   
   
   

   2. min()

   
   
   

   3. max()

   
   
   

   4. All of these

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   max(), min() and abs() are all rounding functions.

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50. What is the value of double consonant ‘E’ defined in Math class?

1. 1. approximately 0

   
   
   

   2. approximately 2.72

   
   
   

   3. approximately 3.14

   
   
   

   4. approximately 3

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   approximately 2.72

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