HTML Tutorial 9

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Identify the output of the following code. var x = 8; var y = 6;

56 28 96

​_____ is the programming language for client-side programs.

JavaScript

​The _____ attribute tells a browser to parse the HTML and JavaScript code together, only pausing to process the script before returning to the HTML file.

async

​Identify a command that displays a dialog box containing the message "Hello World!".

window.alert("Hello World!");

Which of the following methods of the Math operator rounds x up to the next highest integer?

​Math.ceil(x)

​The _____ property should be used only when no markup tags are involved.

​textContent

​Identify a command that uses the dateDiv variable to refer the page element with ID dateNow.

​var dateDiv = document.getElementById("dateNow");

​To break a text string into several lines, which means that the text string continues on the next line, the _____ character should be used.

backslash

The technique for locating the source of an error is to set up _____, which are locations where the browser will pause the program, allowing the programmer to determine the error at that position.

breakpoints

JavaScript is used as a programming tool for: ​

creating interactive web forms and animated graphics

​The _____ attribute can be applied to the script element to ensure that an object can be referenced within a JavaScript program that runs only after the page has completed loading.

defer

​Identify an expression that can be used to refer an element by its id attribute.

document.getElementById(id)

​A(n) _____ is a collection of commands that performs an action or returns a value.

function entity pointer

​Which of the following syntax is used for a function to return a value?

function function_name(parameters){ commands return value;}

​Identify a syntax for JavaScript function.

function_name function(parameters){ commands }

​Identify a syntax to access any of the mathematical constants supported by the Math object.

math.constant ​Math.CONSTANT ​Math.constant

​Identify an expression that defines a date object.

new Date("month day, year" "hrs:mins:secs"); ​new Date("month day, year hrs:mins:secs"); ​new Date("month, day, year" hrs:mins:secs);

​A video embedded on a web page is a(n) _____ and has properties such as source of the video file or the width and height of the video player.

object

​Objects are organized into groups called _____.

object collections

​Identify an expression used to apply a method to an object.

object.object(method) ​object.method(values) ​Object.name(values)

​A _____ occurs after a script has been successfully loaded with no syntax errors and is being executed by a browser.

run-time error

​JavaScript code is attached to an HTML file using the _____ element.

script

​A command that indicates an action for the browser to take should end with a _____.

semicolon

​Identify a method that repeatedly runs commands at specified time breaks in a function created.

setInterval("command", interval)

​Identify a syntax to set the time-delayed commands.

setTimeout("command", delay);

​A user can create an embedded script by removing the _____ attribute and placing all of the JavaScript code within the script element.

src

​Developers advocate that JavaScript be run in _____ in which all lapses in syntax result in load-time or run-time errors.

strict mode

A(n) _____ is any group of characters enclosed within either double or single quotation marks in JavaScript.

text string

​Identify a property used to refer an HTML code that is stored within a page element.

element.innerHTML

​Identify a function that extracts the first numeric value from the text string.

parseFloat(string)

Identify a statement that is added to the first line of the file to run a script in strict mode.​

"use strict";

_____ are intrinsic to the JavaScript language.

Built-in objects

​_____ is the process of locating and fixing a programming error.

Debugging

​Identify a shortcut key on the keyboard to open the debugging tools.

F12

​Identify a return value for the expression 5/"A" using JavaScript.

NaN

​A(n) _____ is a named item in a program that stores a data value, such as a number or text string, or an object, such as a part of the web browser or browser window.

variable

​To avoid fatal errors, it is advised to apply the _____ statement locally only to functions that are created rather than globally as the first line of the script file.

​"use strict"; ​"use global"; ​"use moderate";

​Which of the following can be referenced only after the browser has finished parsing the page content?

​Built-in objects ​Browser objects ​Document objects

​_____ programming distributes the load to prevent a server from getting overloaded with program-related requests.

​Client-side

Which of the following is created by a programmer for use in an application.

​Customized objects


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