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AngularJS interview questions

AngularJS interview questions.

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1.

Why to use AngularJS?

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2.

What is the difference between "ng-show"/"ng-hide" and "ng-if" directives?

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3.

What is Angular’s prefixes $ and $$?

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4.

When dependent modules of a module are loaded?

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5.

How would you specify that a scope variable should have one-time binding only?

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6.

What are Directives?

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7.

Explain what is services in AngularJS

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8.

What is the difference between one-way binding and two-way binding?

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9.

Does AngularJS has dependency on jQuery?

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10.

Explain what is directive and mention what are the different types of Directive?

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11.

What is auto bootstrap process in AngularJS?

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12.

What are the advantage of AngularJS?

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13.

What is scope in AngularJS?

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14.

What is scope hierarchy?

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15.

What are Filters in AngularJS?

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16.

What is a singleton pattern and where we can find it in AngularJS?

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17.

What are Directives in AngularJS?

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18.

What are the AngularJS features?

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19.

What are the basic steps to unit test an AngularJS filter?

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20.

How do you share data between controllers?

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21.

Explain what is a "$scope" in AngularJS

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22.

What directive would you use to hide elements from the HTML DOM by removing them from that DOM not changing their styling?

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23.

How do you hide an HTML element via a button click in AngularJS?

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24.

How do you disable a button depending on a checkbox’s state?

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25.

What is restrict option in directive?

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26.

What is jQLite/jQuery Lite?

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27.

Explain what Angular JS routes does?

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28.

What should be the maximum number of concurrent “watches”?

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29.

Explain what is Angular Expression? Explain what is key difference between angular expressions and JavaScript expressions?

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30.

What are different ways to invoke a directive?

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31.

What is the role of ng-app, ng-init and ng-model directives?

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32.

How to access jQLite?

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33.

What is the role of services in AngularJS and name any services made available by default?

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34.

What is manual bootstrap process in AngularJS?

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35.

What is a digest cycle in AngularJS?

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36.

Explain what is the difference between link and compile in AngularJS?

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37.

Is it a good or bad practice to use AngularJS together with jQuery?

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38.

If you were to migrate from Angular 1.4 to Angular 1.5, what is the main thing that would need refactoring?

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39.

How do you reset a "timeout", "interval()", and disable a "$watch()"?

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40.

Where should we implement the DOM manipulation in AngularJS?

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41.

What is an interceptor? What are common uses of it?

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42.

How would you react on model changes to trigger some further action?

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43.

How would you validate a text input field for a twitter username, including the @ symbol?

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44.

How would you make an Angular service return a promise?

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45.

What is the difference between $scope and scope?

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46.

Can you define multiple restrict options on a directive?

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47.

Explain what is injector?

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48.

How AngularJS is compiled?

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49.

What makes the angular.copy() method so powerful?

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50.

Explain what is linking function and type of linking function?

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51.

When should you use an attribute versus an element?

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52.

What is $scope and $rootScope?

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53.

What is DDO (Directive Definition Object)?

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54.

Explain what is DI (Dependency Injection ) and how an object or function can get a hold of its dependencies?

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55.

Explain how $scope.$apply() works?

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56.

How AngularJS compilation is different from other JavaScript frameworks?

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57.

How Directives are compiled?

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58.

How would you programatically change or adapt the template of a directive before it is executed and transformed?

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59.

What are Compile, Pre and Post linking in AngularJS?

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60.

When creating a directive, it can be used in several different ways in the view. Which ways for using a directive do you know? How do you define the way your directive will be used?

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61.

How would you implement application-wide exception handling in your Angular app?

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