61⟩ Tell me Is JavaScript case sensitive?
Yes JavaScript is case sensitive
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“User Interface Expert based Frequently Asked Questions by expert members with experience as GUI Developer. These questions and answers will help you strengthen your technical skills, prepare for the new job test and quickly revise the concepts”
90 UI Developer Questions And Answers
62⟩ Explain what is the difference between the application model of HTML and HTML5?
Trick question, there is no difference. HTML5 is a continuum of HTML and just a souped up version of the original HTML. There has been no major paradigm shift.
63⟩ Do you know what purpose do Work Workers serve and what are some of their benefits?
Web Workers are background scripts that do not interfere with the user interface or user interactions on a webpage, allowing HTML to render uninterrupted while JavaScript works in the background.
64⟩ Tell me what are some new input attributes in HTML5?
There are many new form elements including: datalist, datetime, output, keygen, date, month, week, time, number, range, email, and url.
65⟩ Tell me what is the new DOCTYPE?
Instead of typing out a ridiculously long DOCTYPE statement to tell the browser how to render your webpage, this long line of code has been truncated to <!doctype html>.
66⟩ Explain what are the new media-related elements in HTML5?
Canvas and WebGL. <Canvas> is a new element that acts as a container for graphical elements like images and graphics. Coupled with JavaScript, it supports 2D graphics. WebGL stands for Web Graphics Language, a free cross-platform API that is used for generating 3D graphics in web browsers.
67⟩ Explain what is the syntax difference between a bulleted list and numbered list?
Billeted lists use the <ul> tag, which stands for "unordered," whereas <ol> is used to create an ordered list.
68⟩ Explain what is the difference between "==" and "==="?
"==" checks equality, "===" checks equality and type
69⟩ Explain Inside a php function, what param needs to be set in order to access a global variable?
function function_name(){
global $the_global_var;
}
70⟩ Assign any variable name a value of "Hello World", and print that variable's contents to the console.?
var t = "Hello World";
console.log(t);
71⟩ Explain what is an AJAX request and what is a simple example of where a AJAX request would be used?
Asynchronous JavaScript and XML. Client side process used for GET, POST etc to get new data without having to refresh the page.
72⟩ Tell me how do you select all elements with the class of "selected" in jQuery?
$('.selected');
73⟩ Tell me how do you install/use jQuery in a project. What is the minimum setup needed to start using jQuery?
script tag, linked to a jquery CDN or locally hosted file.
74⟩ Tell me what is the difference between require() and include() when an error is encountered?
include() will raise a warning if it fails, require() will raise a fatal error.
75⟩ Explain what is the difference between SVG and <Canvas>?
<Canvas> is an element that manipulates two-dimensional (2D) pixels while Scalable Vector Graphics works in 2D and three-dimensional (3D) vectors. Essentially, <Canvas> is to SVG as Photoshop is to Illustrator.
76⟩ Create an array in JavaScript with a list of 4 colors, assign that array to the variable, 'colors'?
var colors = ['red, 'yellow', 'green', 'blue'];
77⟩ How to include a comment in JavaScript?
/* This is a comment block */
//This is a commented out line
78⟩ Tell me what are some new HTML5 markup elements?
There are several:
☛ <article>
☛ <aside>
☛ <bdi>
☛ <command>
☛ details>
☛ <figure>
☛ <figcaption>
☛ <summary>
☛ <header>
☛ <footer>
☛ <hgroup>
☛ <mark>
☛ <meter>
☛ <nav>
☛ <progress>
☛ <ruby>
☛ <rt>
☛ <section>
☛ <time>
☛ and <wpr>
79⟩ Explain what are three ways to reduce page load time?
Reduce image sizes, remove unnecessary widgets, HTTP compression, put CSS at the top and script references at the bottom or in external files, reduce lookups, minimize redirects, caching, etc.
80⟩ Explain what are data- attributes good for?
The HTML5 data- attribute is a new addition that assigns custom data to an element. It was built to store sensitive or private data that is exclusive to a page or application, for which there are no other matching attributes or elements.
