Web Technology Experts Notes

Bootstrap is Javascript framework which is used for building the rich web applications with minimal effort.Bootstrap, a sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. Current Version of Bootstrap is v3.3.1. You can download from http://getbootstrap.com/.

Question: Who developed the Bootstrap?
Mark Otto and Jacob Thornton at Twitter

Question: What are the key components of Bootstrap?

Plenty of CSS files
Scaffolding
List of layout components
JavaScript Plugins
Customize your components

Question: Why Use Bootstrap?

Easy to use
Responsive features
Mobile-first approach
Browser compatibility
Fluide & Fixed Layout available

Question: From where we can download the Bootstrap?
http://getbootstrap.com/

Question: Can we include bootstrap CDN instead of download the Bootstrap?
Yes sure, we can do from following

<!-- Latest compiled and minified CSS -->
<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css" rel="stylesheet"></link>

Question: What is class loaders in Bootstrap?
Class loader is a part of Java Runtime Environment which loads Java classes into Java virtual environment.

Question: What are different types of layout available in Bootstrap?

Fluid Layout
Fixed Layout

Question: What is Fluid Layout in Bootstrap?
Fluid layout adapts itself to different browser. Means design automatic adjust according to browser size.

Question: What is Fixed Layout in Bootstrap?
Fixed layout doesn't adapts itself to different browser but it can be responsive.

Question: What is responsive layout?
Responsive layout which is able to adapt itself to different sizes as well, but when resizing, the number of columns changes according to the available space.

Question: What is difference between Fluid Layout and responsive Layout?
Fluid layout adapts itself to different browser window sizes, all the values used are calculated proportionally to the viewport size, so when resizing, all the columns are resized.

Responsive layout is able to adapt itself to different sizes as well. When resizing, the number of columns changes according to the available space.

Question: What function you can use to wrap a page content?

.container

Question: How to classified pagination in bootstrap?
Add class "pagination" on your page for pagination.
.disabled, .active are available
.pagination-Ig, .pagination-sm to get different sizes

Question: What is Jumbotron?
Jumbotron is used for content that you want to highlight like some slogan OR marketing headline.

Question: What to display code in bootstrap?
you can use following tags

<code></code>

Question: What is Modal plugin used for in Bootstrap?
Modal Plugin is a child window that is layered over its parent window

Question: What is Bootstrap Container in Bootstrap?
Bootstrap container is a class which is useful and creating a centred area in the page for display.

Question: What is Bootstrap collapsing elements?
Bootstrap collapsing elements enables you to collapse any element without using external JavaScript.

Question: How to add badge to list group in Bootstrap?

<span class="badge"></span> in LI Tag

Question: What is Media Object?
Media objects in Bootstrap enables to put media object like image, video or audio

Question: What are different types of Media Object?

.media
.media-list

Question: What is Bootstrap well?
Bootstrap well is a container which makes the content to appear sunken.

Question: What are current Stable version of Bootstrp
Version: 3.3.7, Dated: July 25, 2016

Question: In Which language Bootstrap is written?
HTML, CSS, LESS, Sass and JavaScript

Tuesday, 30 December 2014

Node Js Interview Questions and Answers for Experienced

Question: What is node.js?
Node.js is a software for scalable server-side and networking applications.
Node.js applications are written in JavaScript.
It can be run within the Node.js runtime on Mac OS X, Windows and Linux with no changes.

Question: In which language Node.js is written?
C,C++, javaScript.

Question: Who is creater of Node.js?
Ryan Dahl

Question: What is current stable version of Node.js?
6.6.0 Version / 15 September 2016.

Question: How node.js works?
Node.js works on a V8 environment, it is a virtual machine that utilizes JavaScript as its scripting language.

Question: From where we can download Node.js?
http://nodejs.org/download/

Question: What do you mean by the term I/O?
Input/Output

Question: What does event-driven programming?
In event-driven programming, flow of the program is determined by events.

Question: Where Node.js can be used?

Web applications ( especially real-time web apps )
Network applications
Distributed systems
General purpose application

Question: What is Advantage of Node.js?

Following are advantage of Node.js as compare to other web scripting.

Faster
More concurrency user
Asynchronous
Least blocks
Helps to build scalable network programs

Question: What are two different types of functions in Node.js?

Asynchronous
Synchronous

Question: What is Callback in node.js?
It is used to handle the multiple request.

Question: What tool and IDE is used for Node.js?

Atom
Nodeclipse Enide Studio
JetBrains WebStorm
JetBrains IntelliJ IDEA
Microsoft Visual Studio with TypeScript
NoFlo – flow-based programming environment integrated with GNOME APIs

Question: How to get Post Data in Node.js?

app.use(express.bodyParser());
app.post('/', function(request, response){
    console.log(request.body.user);
    
});

Question: How to make Post request in Node.js?

 var request = require('request');
request.post(
    'http://www.example.com/action',
    { form: { key: 'value' } },
    function (error, response, body) {
    if (!error && response.statusCode == 200) {
    console.log(body)
    }
    }
);

Question: What is callback hell?
Callback hell refers to heavily nested callbacks that have become unreadable

Question: How to handle the "Unhandled exceptions" in Node.js?
It can be caught at the "Process level" by attaching a handler for uncaughtException event.
Example:

process.on('uncaughtException', function(err) {
  console.log('Caught exception: ' + err);
});

Question: How to download image from Web?

#Include Important library
var fs = require('fs'),
request = require('request');

#Create a Download Function
var downloadImage = function(uri, filename, callback){
  request.head(uri, function(err, res, body){
    console.log('content-type:', res.headers['content-type']);
    console.log('content-length:', res.headers['content-length']);

    request(uri).pipe(fs.createWriteStream(filename)).on('close', callback);
  });
};

Use the function in following way:

downloadImage('https://www.google.com/images/srpr/logo3w.png', 'google.png', function(){
  console.log('image is downloaded');
});

Question: How to Remove directory which is not empty?

var rimraf = require('rimraf');
rimraf('/some/directory', function () {
 console.log('Directory is removed'); 
});

Web Technology Experts Notes

Wednesday, 31 December 2014

Bootstrap Interview Questions and Answers for Experienced

Tuesday, 30 December 2014

Node Js Interview Questions and Answers for Experienced

Wednesday, 31 December 2014

Bootstrap Interview Questions and Answers for Experienced

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Tuesday, 30 December 2014

Node Js Interview Questions and Answers for Experienced

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