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Exam 7: Using Object Oriented Javascript

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Question 21

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A(n) ____ function is a function that is used as the basis for a custom object.

A) constructor
B) object
C) instance
D) class

E) A) and D)
F) B) and C)

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Question 22

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The code  new Date() creates an empty Date object.

A) True
B) False

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Question 23

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The principle of ____________________ states that any methods and properties that other programmers do not need to access or know about should be hidden.

Why is JavaScript said to be an object-based programming language?

If you assign the current date and time to a variable, what is the value of that variable one hour later? Explain.

Objects are also called ____.

A(n) ____ is an object that has been created from an existing class.

You can create an empty object by assigning a pair of empty __________ to a variable name.

When working with a date, JavaScript stores the month as a ____.

You can use the Math  object directly in your programs without instantiating a new object.

What is a sub-object? Provide an example.

____________________ refers to the creation of reusable software objects that can be easily incorporated into multiple programs.

You can create an empty object by assigning a pair of empty braces to a variable  name.

The ____ class contains methods and properties for manipulating the date and time.

What are some of the benefits of encapsulation?

The code for a method must be stored in an external function.

The ____ class contains methods for manipulating numbers and properties that contain static values representing some of the numeric limitations in the JavaScript language.

A(n) ____ array is an array whose elements are referred to with an alphanumeric key instead of an index number.

Which Number class method can you use to convert a number to a string that is formatted with local numeric formatting style?

When creating an object using a literal, you separate multiple property-value pairs with ____.