Question 1

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

Accepted Answer

The toLocaleString() method converts a number to a string formatted according to the locale and formatting options of the user's system. This includes using the appropriate decimal separator, thousands separator, and grouping of digits according to the user's system preferences. Therefore, it is the best choice for converting a number to a string with local numeric formatting style.

Question 2

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

Accepted Answer

The answer of You can create an empty object by...

Question 3

Match between columns
                        Premises: Programming code and data that can be treated as an individual unit or component
Returns the square root of the specified value
A function assigned a name within a custom object
Type of array that enables you to add object properties incorporating numbers
The easiest way to declare a custom object
Returns a value rounded to the nearest integer
Elements required for a source program to communicate with an object
Converts a number to a string using the number of decimal places specified
A template, or blueprint, that serves as the basis for new objects
Creates a Date object containing the current date

Accepted Answer

The Answer of associative and literal and toFixed() and interface is...

Question 4

Which class requires you to use a constructor?

Accepted Answer

The Date class requires the use of a constructor to create a new date object with specific values for year, month, day, hour, minute, second, and millisecond. The other classes do not require the use of a constructor in order to be used.

Question 5

How can you get the full text of the day of the week based on information retrieved from a Date object?

Accepted Answer

The answer of How can you get the full text...

Question 6

Describe two ways of adding properties to an object.

Accepted Answer

The answer of Describe two ways of adding properties to...

Question 7

What is a sub-object? Provide an example.

Accepted Answer

The answer of What is a sub-object? Provide an example....

Question 8

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

Accepted Answer

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

Question 9

You can append the name of any Number class method or property to the name of an existing variable that contains a(n)____________________ value.

Accepted Answer

The answer of You can append the name of any...

Question 10

How do you declare a property within an object literal?

Accepted Answer

The answer of How do you declare a property within...

Question 11

Which method of the Math object rounds a value to the next lowest integer?

Accepted Answer

The floor() method rounds a number down to the nearest integer, which is the next lowest integer. ceil() method rounds a number up to the nearest integer. max() method returns the largest of two or more numbers, and min() method returns the smallest of two or more numbers.

Question 12

What are some of the benefits of encapsulation?

Accepted Answer

The answer of What are some of the benefits of...

Question 13

Explain the difference between the Number and Math classes.

Accepted Answer

The answer of Explain the difference between the Number and...

Question 14

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

Accepted Answer

The answer of Why is JavaScript said to be an...

Question 15

What is garbage collection and how is it performed in JavaScript apps?

Accepted Answer

The answer of What is garbage collection and how is...

Question 16

To add a property to a constructor function, you must add a statement to the function body that uses the ____ keyword.

Accepted Answer

The answer of To add a property to a constructor...

Question 17

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

Accepted Answer

The answer of The principle of ____________________ states that any...

Question 18

A particular instance of an object ____________________ its methods and properties from a class-that is, it takes on the characteristics of the class on which it is based.

Accepted Answer

The answer of A particular instance of an object ____________________...

Question 19

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

Accepted Answer

The answer of ____________________ refers to the creation of reusable...

Question 20

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

Accepted Answer

The answer of If you assign the current date and...

Quiz 7: Using Object Oriented Javascript