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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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