Java Questions 21

1. What is the purpose of the keyword strictfp?
   
   Answer:
   strictfp forces floating points to adhere to the IEEE 754 standard.
   The keyword strictfp can only be used with classes, interfaces and non-abstract methods.

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2. What can strictfp modify?
   
   Answer:
   stictfp can modify a 1) class or 2) non-abstract method declarations. A variable (such as a primitive int) can never be declared strictfp.

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3. What is the purpose of Java var-args syntax?
   
   Answer:
   The purpose of Java var-args is to allow you to create methods that can take a variable number of arguments.

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4. What is the name for the elements that you specify between the parentheses when you are invoking a method in Java?
   
   Answer:
   These are known as arguments.
   The "method call" below contains two arguments:
   

    getSalary("name", age);
    

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5. What are the elements in the method's signature that indicate what the method must receive when the method is called?
   
   Answer:
   These are known as parameters. The method declaration below contains 2 parameters.
   

   Employee getSalary (String name, int age) {} 
   

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6. Where does the "var-arg" parameter appear in a method declaration?
   
   Answer:
   In a method declaration, the var-arg must appear last.
   

   static int sum (int ... numbers){
    int total = 0;
     for (int i = 0; i &t; numbers.length; i++)
      total += numbers [i];
     return total;
   }
   

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7. What happens every time a new object is created?
   
   Answer:
   Everytime you make a new object, at least one constructor is invoked.

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8. When does the default "no-args" constructor get created?
   
   Answer:
   When you do not explicitly provide a constructor, the compiler will create a default "no-args" constructor.

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9. Do constructors have a reutrn type?
   
   Answer:
   No, constructors do not have a return type and only methods have a return type.

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10. What type of access modifiers can constructors have?
    
    Answer:
    Constructors can have the standard access modifiers,
    public, protected, default, private and they can take arguments (including var-args), just like methods.