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AngularJS

100 AngularJS interview questions

Only coding challenges
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AngularJS Fundamentals


  • 1.

    What is AngularJS and what are its core features?

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  • 2.

    Explain the concept of two-way data binding in AngularJS.

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  • 3.

    What are directives in AngularJS? Give some examples.

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  • 4.

    How does the AngularJS digest cycle work for data binding?

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  • 5.

    What is scope in AngularJS, and how is it different from the JavaScript scope?

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  • 6.

    Define what a controller is in AngularJS.

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  • 7.

    Can you explain what a service is in AngularJS?

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  • 8.

    How do you share data between controllers in AngularJS?

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  • 9.

    What is the purpose of the ng-app directive?

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  • 10.

    Explain how ng-model directive works in AngularJS.

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Controllers and Scope


  • 11.

    What is the role of $scope in AngularJS?

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  • 12.

    How would you use $rootScope in AngularJS?

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  • 13.

    Can you explain the concept of scope hierarchy in AngularJS?

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  • 14.

    What is the role of a controller in AngularJS?

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  • 15.

    How do you define a controller’s method in AngularJS?

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Directives and Data Binding


  • 16.

    What are some commonly used built-in directives in AngularJS?

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  • 17.

    How do you create a custom directive in AngularJS?

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  • 18.

    Can you explain the compile and link phases in AngularJS directives?

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  • 19.

    What is the difference between '@', '=', and '&' in directive scopes?

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  • 20.

    How do you implement two-way data binding in a directive?

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Services and Factories


  • 21.

    Differentiate between services and factories in AngularJS.

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  • 22.

    How would you create a service using the $provide service?

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  • 23.

    Explain the concept of dependency injection in AngularJS.

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  • 24.

    What are the $injector and $provide services in AngularJS?

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  • 25.

    How do you use the value and constant methods in AngularJS?

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Modules and Dependency Injection


  • 26.

    How do you define a module in AngularJS?

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  • 27.

    What is the role of the ngRoute module in AngularJS?

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  • 28.

    How do you configure dependency injection in AngularJS?

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  • 29.

    What are the ways to avoid minification issues in AngularJS?

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  • 30.

    Explain the use of $routeProvider in AngularJS.

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Filters and Expressions


  • 31.

    What are expressions in AngularJS?

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  • 32.

    How do filters work and how are they used in AngularJS?

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  • 33.

    Can you create a custom filter in AngularJS?

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  • 34.

    What is the difference between filters in controllers and directives?

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ng-Repeat and DOM Manipulations


  • 35.

    Explain the purpose of ng-repeat directive and how it works.

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  • 36.

    How would you track by an index in ng-repeat?

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  • 37.

    What are the best practices for DOM manipulation in AngularJS?

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Event Handling


  • 38.

    How do you handle events in AngularJS?

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  • 39.

    What is the ng-click directive and how does it work?

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  • 40.

    Explain event propagation in AngularJS.

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$http and AJAX


  • 41.

    How does the $http service work in AngularJS?

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  • 42.

    Explain the promise API returned by $http.

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  • 43.

    How do you make an AJAX call using AngularJS?

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  • 44.

    What is the difference between $http and $resource?

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  • 45.

    How do you intercept requests in AngularJS?

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Routing and Multiple Views


  • 46.

    How would you enable routing in AngularJS?

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  • 47.

    What are the roles of $routeProvider and $location in AngularJS?

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  • 48.

    Explain the concept of multiple views and routing in AngularJS.

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  • 49.

    What’s the difference between ng-href and href?

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Forms and Validation


  • 50.

    How does form validation work in AngularJS?

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  • 51.

    Explain the ng-valid, ng-invalid, ng-dirty, ng-pristine, ng-touched, and ng-untouched classes.

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  • 52.

    What is an ng-submit?

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  • 53.

    How do you create a custom validation directive?

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Animation


  • 54.

    How can you animate elements in AngularJS?

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  • 55.

    What module allows animations in AngularJS?

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  • 56.

    Can you use CSS3 transitions with AngularJS animations?

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Testing


  • 57.

    What is Unit Testing in AngularJS?

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  • 58.

    What testing framework is typically used with AngularJS?

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  • 59.

    Explain how to use the $httpBackend service in a test.

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AngularJS Performance


  • 60.

    How would you optimize watch operations in AngularJS?

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  • 61.

    What are some common performance issues in AngularJS applications?

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  • 62.

    Explain the impact of isolated scopes on performance.

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Security Concerns


  • 63.

    Discuss AngularJS security best practices.

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  • 64.

    How does AngularJS handle security features like XSRF protection?

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  • 65.

    How to sanitize user input in AngularJS?

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Advanced AngularJS Concepts


  • 66.

    What is a digest cycle in AngularJS and how does it work?

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  • 67.

    Explain the concept of manual bootstrapping in AngularJS.

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  • 68.

    Discuss the use of linking functions and their purpose in custom directives.

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  • 69.

    How do you create a custom service that offers API functionality?

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  • 70.

    What is the $compile service and how is it used?

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Component Interaction


  • 71.

    How do components communicate in AngularJS?

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  • 72.

    What is the difference between $emit, $broadcast, and $on in AngularJS?

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  • 73.

    How would you bind to events on a service?

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Isolated Scope and Transclusion


  • 74.

    What is isolated scope in AngularJS directives?

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  • 75.

    Explain the concept of transclusion in AngularJS.

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AngularJS and RESTful Services


  • 76.

    How does AngularJS work with RESTful APIs?

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  • 77.

    What are best practices in designing AngularJS services that interact with backend APIs?

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  • 78.

    How do you handle RESTful resource relations in AngularJS?

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Internationalization and Localization


  • 79.

    How do you implement internationalization in AngularJS?

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  • 80.

    What tools or modules are available to help with localization in AngularJS applications?

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Building and Deploying AngularJS Applications


  • 81.

    How do you build an AngularJS application for production?

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  • 82.

    Discuss the deployment process for an AngularJS app.

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  • 83.

    What build tools can you use for AngularJS projects?

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Debugging AngularJS Apps


  • 84.

    How to debug an AngularJS application?

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  • 85.

    What are some common debugging techniques in an AngularJS context?

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AngularJS Ecosystem


  • 86.

    Name some popular libraries or plug-ins used with AngularJS.

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  • 87.

    How does AngularJS integrate with other frameworks or libraries?

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Advanced Routing Techniques


  • 88.

    How to use resolve in AngularJS routes?

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  • 89.

    What are route life cycle events in AngularJS?

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AngularJS Directives Deep Dive


  • 90.

    Explain the use of require in AngularJS directives.

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  • 91.

    How do you validate input using AngularJS directives?

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  • 92.

    Discuss the usage of scope inheritance in directives.

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  • 93.

    How do you manipulate the DOM in directives?

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  • 94.

    What are compile and pre/post linking functions?

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State Management


  • 95.

    How do you manage states in large AngularJS applications?

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  • 96.

    Compare $route versus $stateProvider.

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Data Persistence


  • 97.

    How does data persistence work in AngularJS applications?

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  • 98.

    What are some strategies for saving application state across page reloads?

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Best Practices


  • 99.

    What are the dos and don’ts regarding AngularJS best practices?

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  • 100.

    Discuss some anti-patterns in AngularJS development.

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