prep for interview

Question 1

root scope

Answer 1

every ang js app has a root scope

all the child scopes inherit fom the root scope

Each view has its own $scope (which is a child of the root scope), so whatever variables one view controller sets on its $scope variable, those variables are invisible to other controllers.

Question 2

$inject

Answer 2

can be used to inject dependencies

Question 3

module config block vs module run block

Answer 3

Question 4

ngChange

Answer 4

do something when an input value changes

Question 5

nghref

Answer 5

used for adding links

Question 6

inline templates vs external templates vs internal templates

Answer 6

Question 7

services vs factories vs providers

Answer 7

both of them are used to share data across controllers

the syntax is however different for both

Substitutable objects that can be wired together using DI.

· Use services to share code and data across the app.

· Angular Services are lazily initialized (initiates only when its needed)

· Angular Services are singletons per Angular module.

· Angular has many in-built services (starting with $) e.g. $rootScope, $http, $routeProviders etc.

Question 8

$window

Answer 8

Reference to native window object.

$window.alert(“vhjbvkh”);

Question 9

$location

Answer 9

Question 10

$document

Answer 10

jQuery/jqLite wrapper for window.document

$document[0].title

Question 11

$timeout

Answer 11

Question 12

$interval

Answer 12

Question 13

$templateCache

Answer 13

Question 14

$http.post vs jquery.post

Answer 14

Question 15

what is routing?

Answer 15

Question 16

$routeProvider and ngRoute

Answer 16

it can be injected as a parameter, while implementing routing in our application;

ngRoute module is or can be injected into our app

Question 17

promise

Answer 17

http service - we make async rqst to server; using ‘get’ method for example - we can get or fetch json data from the server; this request returns a promise object with .success() and .error(); if we tell $http to fetch json , the result will be automatically be decoded into JS objects and arrays; $http returns a promise, so success() gets the data …

Question 18

links

Answer 18

or example we are creating a note-taking app; if we hover over a note - we want to display the description; so we need jquery; so how do we do this? We use links to attach or put th jquery code into the directive; This is the best spot to do any DOM manipulation or logic functionality for your directive; the three automatically injected parameters are scope, element (refers to outermost element of the included template) and attribute (refers to the attributes on the directive element);

Question 19

isolate scope

Answer 19

By passing an object to the scope option, you are creating an isolate scope. This tells the directive to keep scope inside of itself and not to inherit or share with other scopes.

Question 20

$scope vs isolate scope

Answer 20

$scope - Allows you to set values as properties on our scope object.

scope: { } - Allows you to create an isolate scope private to this directive.

Question 21

scope bindings

Answer 21

1. Text Binding (Prefix: @) | Parsed as string and one-way binding
2. One-way Binding (Prefix: &) | defined as getter functions and read-only inside directive’s scope
3. Two-way Binding (Prefix: =) | Can be changed inside directive and reflects outside as well