Module 6 quiz on arrays and parameters

Module 6 quiz on arrays and parameters


1. Which code segment illustrates a correct way to declare an array of 10 objects. Assume the class Beverage has been created.

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Ans:-
Beverage[] guestList = new Beverage[10];

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2. Consider the following incorrect code segment. Assume the Pet class has been defined and contains the method setName(String).

Pet customer[] = new Pet[5];
customer[3].setName("Spot");

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Ans:-

We learned that this code is incorrect because...select the best explanation

although the array of Pet references has been created, none of them point to Pet objects yet. Each object must be instantiated individually.
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3. Select all of the code segments that properly create an array of 3 objects and instantiate them. Assume the class Lesson has been created.

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Ans:-
Lesson [] week1 = new Lesson[3];
for (int i = 0; i<week1.length; i++){
    week1[i] = new Lesson();
}

Lesson [] week1 = {new Lesson(), new Lesson(), new Lesson()};
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4. When an object is passed as a parameter, its state is changed within the method that it was passed to because...

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Ans:-

a copy of the object was passed.
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5. Consider the code

Pet sparky = new Pet();
Pet fido = sparky;


Line 2 of this code...

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Ans:-

sets the object fido to reference or "point to" the object sparky.

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6. Select all of the scenarios where using a static class constant would be appropriate.

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Ans:-


To declare a constant that is used in different methods of the class and whose value never changes.

To declare a constant that is somehow associated with the class and may be accessed by client programs.


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