Core AngularJS Interview Questions Every Candidate Should Ace

• What is AngularJS and why is it widely used?
  AngularJS is an open-source JavaScript framework loved for its two-way data binding, MVC architecture, and ability to build responsive single-page applications quickly.

• Explain the scope hierarchy in AngularJS.
  AngularJS apps have one $rootScope with child $scope objects created for each controller or directive. This structure mimics the DOM hierarchy and manages data flow effectively.

• What is two-way data binding?
  Two-way data binding ensures that changes in the model automatically update the view, and user interactions update the model seamlessly without extra coding.

• What are AngularJS directives and their types?
  Directives extend HTML with new attributes or elements. Common types include attribute (A), element (E), class (C), and comment (M) directives, enabling reusable UI components.

Advanced AngularJS Interview Questions to Demonstrate Expertise

• Describe the digest cycle and how AngularJS detects changes.
  The digest cycle monitors all watchers and updates views when model changes occur. It can run automatically or via manual triggers like $apply().

• How does Dependency Injection improve AngularJS applications?
  DI delivers required dependencies to components without hard-coding them, enhancing modularity and testability.

• How to optimize AngularJS app performance?
  Techniques include using one-time bindings, minimizing watchers, avoiding deep watch expressions, and optimizing ng-repeat with track-by.

Testing, Real-World Practices, and Interview Tips

• What testing tools are used for AngularJS?
  Jasmine for behavior-driven tests, Karma for test runner automation, and Protractor for end-to-end UI testing.

• Prepare real-world examples that showcase how you solved AngularJS challenges or optimized performance.

• Stay current on AngularJS trends, including migration strategies to Angular (2+), demonstrating adaptability.

With thorough preparation using these AngularJS interview questions, candidates will confidently demonstrate their technical skills and problem-solving abilities to impress any interviewer in 2025 and beyond.

For more, Sprintzeal.