Objects

Question 1

The individual instructions in JavaScript are referred to as functions.

True or False?

Answer 1

False

Question 2

Which of the following is the proper symbol to reference at the beginning of a section of comments that includes multiple lines?

//

*/

/*

(/)

Answer 2

/*

Question 3

You need to write code that will increase the value of a variable by 5. Which of the following is valid? Choose all that apply.

=+5

+=5

++5

+5

Answer 3

+=5 and +5

Question 4

Which of the following operators is used to reduce the amount of code that would normally be required for an IF statement in JavaScript?

Ternary

Equality

Numeric

Data

Answer 4

Ternary

Question 5

Which of the following loops is preferred due to a decreased amount of code to execute the same functionality?

For

If

While

Do while

Answer 5

For

Question 6

Which of the following is not accurate syntax?

Function myFunction()

function myFunction()

new function ()

new object()

Answer 6

function myFunction()

Question 7

Given the following array, var cars = [“Volvo”, “Mazda”, “Toyota”] how would you access the value of Mazda?

Cars[Mazda]

Cars[2]

Cars[3]

None of the above

Answer 7

None of the above

Question 8

Which of the following uses the best practices for casing in JavaScript?

myVariableName

myFUNCTION

MyFunctionName

MyFunctionName

Answer 8

myVariableName

Question 9

In a JavaScript IF statement the parentheses indicate the code to be executed if the condition evaluates to True.

True or False?

Answer 9

False

Question 10

Which option is available to prevent code developers from having to write large if statements that have multiple else if clauses?

Slice

For loop

Do…while

Switch

Answer 10

Switch

Question 11

To create a loop or iteration you can simply replace the word if with which of the following?

Function

Variable

While

For

Answer 11

While

Question 12

Which of the following is the most frequently used type of loop?

If

While

Do…while

For

Answer 12

For

Question 13

Which of the following is incredibly important when creating a loop to ensure that you don’t write an infinite loop?

Check the condition

Increment the variable

Set the index

None of the above

Answer 13

Increment the variable

Question 14

You want to create a reusable section of JavaScript code that you can associate with an object. What keyword should you use to begin?

Formula

Method

Function

Property

Answer 14

Function

Question 15

Which of the following keywords will terminate the current iteration of the loop when it is encountered but not the loop itself?

Break

Continue

Switch

End

Answer 15

Continue

Question 16

When you are working with external JavaScript files the files themselves do not contain script tags.

True or False?

Answer 16

True

Question 17

Which of the following would be the proper syntax for writing an alert that said: “Welcome to JavaScript”?

msgBox(“Welcome to javaScript”)

alert(“Welcome to javaScript”)

alertBox(“Welcome to javaScript”)

window.show(“Welcome to javaScript”)

Answer 17

alert(“Welcome to JavaScript”)

Question 18

What is the appropriate syntax for creating a function in JavaScript?

function:myFunction;

function myFunction ()

function:myFunction()

function = myFunction()

Answer 18

function myFunction ()

Question 19

Once a function has been declared what is the next step to using that function?

Invoking it

Defining it

Methodizing it

Using it as an object property

Answer 19

Invoking it

Question 20

Which of the following is not accurate syntax?

var b = “This is a string”

var c = “This is a string”

var a = “This is a string

a = “This is a string”

Answer 20

var a = “This is a string