1Z0-811 Arrays and Methods Practice Question

Arrange the steps to create an object from a class in Java in the correct order.

Drag steps to the numbered slots on the right, or tap a step then tap a slot.

Steps

Order

1Step 1

2Step 2

3Step 3

4Step 4

5Step 5

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

Define the class, then declare a variable, then instantiate with new, then assign to variable, then use the object.

First define the class, then declare a variable, instantiate with new, assign to variable, and then use the object.

Answer analysis

For each option: why learners choose it and why it is or isn't the right answer here.

✓
Define the class, then declare a variable, then instantiate with new, then assign to variable, then use the object.
Why this is correct
This is the correct order because you must first define the class blueprint, then declare a reference variable to hold the object, then instantiate the object using 'new', assign the reference to the variable, and finally use the object via the variable.
✗
Define the class, then instantiate the object, then declare a variable, then assign to variable, then use the object.
Why it's wrong here
This is incorrect because you cannot assign an object reference to a variable that has not been declared yet; the variable must be declared before instantiation and assignment.
✗
Declare a variable, then define the class, then instantiate the object, then assign to variable, then use the object.
Why it's wrong here
This is incorrect because the class must be defined before any variable of that type can be declared or any object instantiated; otherwise the class type is unknown.
✗
Instantiate the object, then define the class, then declare a variable, then assign to variable, then use the object.
Why it's wrong here
This is incorrect because you cannot instantiate an object without the class definition being available, and you cannot assign without a declared variable.

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