JavaScript

Question 1

Which method converts a string value to uppercase letters?

Answer 1

toUpperCase()

Question 2

Which event occurs when the loading of an image is terminated?

Answer 2

abort

Question 3

Which event occurs when a user clicks the mouse button outside of a particular input field?

Answer 3

blur

Question 4

Which event occurs when the user clicks on a link or form element?

Answer 4

click

Question 5

Which event occurs when a user modifies the value of a form field?

Answer 5

change

Question 6

Which event occurs when there is a problem loading an external image or resource?

Answer 6

error

Question 7

Which event occurs when a user clicks into a form field?

Answer 7

focus

Question 8

Which event occurs when a page is opened?

Answer 8

load

Question 9

Which event occurs when the user moves the mouse pointer over a link, image or other visible element on a page?

Answer 9

mouseOver

Question 10

Which event occurs when the mouse pointer leaves a link, image or other visible element on a page?

Answer 10

mouseOut

Question 11

Which event occurs when a form’s Reset button is clicked?

Answer 11

reset

Question 12

Which event occurs when the user highlights the text in a form field?

Answer 12

select

Question 13

Which event occurs when a form’s Submit button is clicked?

Answer 13

submit

Question 14

Which event occurs when a page closed?

Answer 14

unload

Question 15

What are attributes of an object, such as height, color, font size, sentence length and so forth?

Answer 15

properties

Question 16

What are actions that an object can be made to perform?

Answer 16

methods

Question 17

Which method creates a pop-up box with the specified message string, which the user can dismiss by clicking a button in the box?

Answer 17

alert()

Question 18

Which method creates a pop-up box with the specified message string and requests user input into a text field in the box?

Answer 18

prompt()

Question 19

Which method creates a pop-up box with the specified message string and requests user confirmation by clicking the OK or Cancel button in the box?

Answer 19

confirm()

Question 20

Which method writes the specified message string in the page?

Answer 20

document.write()

Question 21

What is a named space of memory?

Answer 21

variable

Question 22

Which operator is used to assign values?

Answer 22

=

Question 23

Which data type holds any numeric value used for mathematical operations?

Answer 23

number

Question 24

Which data type holds any string of alphanumeric characters used for words or for numbered phrases that are not mathematically manipulated?

Answer 24

string

Question 25

Which expression creates a string value?

Answer 25

var birthYear = "1956" The quotes around 1956 make it a string value.

Question 26

Which expression creates an integer value?

Answer 26

var birthYear = 1956 If 1956 had quotes around it, it would no longer be an integer, it would become a string.

Question 27

Which data type holds True or False values only?

Answer 27

Boolean

Question 28

Which value indicates that a user enters nothing in a text box then submits the form?

Answer 28

null

Question 29

Which value indicates that a variable has no value assigned yet?

Answer 29

undefined

Question 30

What is a part of a statement that is evaluated as a value?

Answer 30

expression

Question 31

What is a symbol or character used in expressions to store or evaluate a value?

Answer 31

operator

Question 32

Which type of operator assigns a value to a variable using the equal symbol? Example: myNumber = 25

Answer 32

Assignment

Question 33

Which type of operator evaluates to a number? Example: 25 + 75

Answer 33

Arithmetic

Question 34

Which type of operator will evaluate to true or false? Example: 5 != 15

Answer 34

Logical

Question 35

Which type of operator compares two values and returns a true or false value? Example: z == 10

Answer 35

Comparison

Question 36

Which type of operator makes decisions in a script? Example: (a > b) ? a++ : a--

Answer 36

Conditional

Question 37

What process combines text strings using the plus sign? Example: "hello" + "world"

Answer 37

concatenation

Question 38

What is a named set of statements that performs a task or calculates a value?

Answer 38

function let x = myFunction(4, 3); function myFunction(a, b) { return a * b; }

Question 39

How do you declare a function?

Answer 39

function myFunction(parameter1, parameter2) { // code to be executed }

Question 40

What processes a function's statements?

Answer 40

calling statement

Question 41

What happens if you define a function but do not call it?

Answer 41

nothing

Question 42

What is the name of this function? function myFunction(){ return "success"; }

Answer 42

myFunction()

Question 43

What is used to output values from a function?

Answer 43

return

Question 44

What type of variable is declared within a function and available only from within that function?

Answer 44

local variable

Question 45

What type of variable is available throughout the entire script?

Answer 45

global variable

Question 46

What is a value or expression containing data or code that is passed on to a function?

Answer 46

argument

Question 47

What describes when values are passed to a function, and the function's parameters receive a copy of its argument's value? Example: function myFunction(x){ return x; } var num = 2; myFunction(num);

Answer 47

pass by reference

Question 48

What describes when values are passed to a function, and the function's parameters receive its argument's actual value? Example: function myFunction(x){ return x; } myFunction(2);

Answer 48

pass by value

Question 49

Which method determines whether a value is a number?

Answer 49

isNaN()

Question 50

Which method converts a string to its integer equivalent?

Answer 50

parseInt()

Question 51

Which method converts a string to its floating-point decimal equivalent?

Answer 51

parseFloat()

Question 52

Which errors are typically syntax errors and usually cause error alerts?

Answer 52

Load-time errors

Question 53

Which errors occur after the script has loaded and is running, typically caused by improper use of commands?

Answer 53

Run-time errors

Question 54

Which errors are mathematical , casting errors, errors in proper command usage or errors in the structure of the script, which result in the script running improperly?

Answer 54

Logic errors

Question 55

What is the actual data values you provide in JavaScript?

Answer 55

literal

Question 56

What is a self-contained programming component that contains properties and methods?

Answer 56

object

Question 57

What is a reference technique used to access a property or method of an object?

Answer 57

dot notation

Question 58

What are key characteristics and features of JavaScript?

Answer 58

an object-based language based upon an event-driven model is platform-independent enables quick development is relatively easy to learn

Question 59

Does JavaScript perform its functionality primarily on the client or server-side?

Answer 59

client side

Question 60

Which technique adds JavaScript to a single web page within either the \ or \?

Answer 60

embedded scripting

Question 61

Which technique adds JavaScript to a single HTML element?

Answer 61

inline scripting

Question 62

Which technique adds JavaScript by linking web pages to a text file with the .js file name extension?

Answer 62

external scripting

Question 63

How do you apply inline scripting to an element?

Answer 63

\Click Here\

Question 64

What must variable names begin with?

Answer 64

a letter, the underscore ( _ ), or the dollar sign ( $ ) A variable cannot begin with a number!

Question 65

Are these variables the same or unique? var Result var result var RESULT

Answer 65

unique

Question 66

Which object allows you to determine information about the user's browser?

Answer 66

navigator

Question 67

Which property returns a string value indicating the name of the client browser?

Answer 67

navigator.appName

Question 68

Which property returns a string value indicating the version number of the client browser, as well as the client's platform?

Answer 68

navigator.appVersion

Question 69

What is the value of myVar after execution? function counter(x) { return x + 1; } var myVar = 0; counter(myVar); alert(myVar);

Answer 69

0

Question 70

What will the alert box display? var subTotal = 1; var tax = 0.03; alert("The total is " + subTotal * (1 + tax));

Answer 70

The total is 1.03