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Angular Interview Questions

30+ most important Angular interview questions on services, directives, RxJS, forms, state management, and dynamic component building.
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Questions List

Angular Interview GuidesExplore our starter guides to get a solid grasp of Angular interview prep before jumping into practice.
0/3 guides
GUIDES
  • CounterWarm up questionBuild a simple counter that increments whenever a button is clicked
    Available frameworks
  • Contact FormBuild a contact form which submits user feedback and contact details to a back end API
    Available frameworks
  • Holy GrailBuild the famous holy grail layout consisting of a header, 3 columns, and a footer
    Available frameworks
  • Mortgage CalculatorBuild a calculator that computes the monthly mortgage for a loan
    Available frameworks
  • TabsBuild a tabs component that displays a list of tab elements and one associated panel of content at a time
    Available frameworks
  • Dice RollerBuild a dice roller app that simulates the results of rolling 6-sided dice
    Available frameworks
  • Like ButtonBuild a Like button that changes appearance based on the states
    Available frameworks
  • Star RatingBuild a star rating component that shows a row of star icons for users to select the number of filled stars corresponding to the rating
    Available frameworks
  • Todo ListBuild a Todo list that lets users add new tasks and delete existing tasks
    Available frameworks
  • Traffic LightBuild a traffic light where the lights switch from green to yellow to red after predetermined intervals and loop indefinitely
    Available frameworks
  • Digital ClockBuild a 7-segment digital clock that shows the current time
    Available frameworks
  • Tic-tac-toeBuild a tic-tac-toe game that is playable by two players
    Available frameworks
  • Job BoardBuild a job board that displays the latest job postings from Hacker News
    Available frameworks
  • StopwatchBuild a stopwatch widget that can measure how much time has passed
    Available frameworks
  • Transfer ListBuild a component that allows transferring of items between two lists
    Available frameworks
  • Flight BookerPremiumBuild a component that books a flight for specified dates
    Available frameworks
  • Generate TablePremiumGenerate a table of numbers given the rows and columns
    Available frameworks
  • Temperature ConverterPremiumBuild a temperature converter widget that converts temperature values between Celsius and Fahrenheit
    Available frameworks
  • TweetPremiumBuild a component that resembles a Tweet from Twitter
    Available frameworks
  • Analog ClockPremiumBuild an analog clock where the hands update and move like a real clock
    Available frameworks
  • Grid LightsPremiumBuild a grid of lights where the lights deactivate in the reverse order they were activated
    Available frameworks
  • Tabs IIPremiumBuild a semi-accessible tabs component that has the right ARIA roles, states, and properties
    Available frameworks
  • Tabs IIIPremiumBuild a fully accessible tabs component that has keyboard support according to ARIA specifications
    Available frameworks
  • Birth Year HistogramPremiumBuild a widget that fetches birth year data from an API and plot it on a histogram
    Available frameworks
  • Connect FourPremiumBuild a game for two players who take turns to drop colored discs from the top into a vertically suspended board/grid
    Available frameworks
  • Pixel ArtPremiumBuild a pixel art drawing tool where users can paint pixels with selected colors
    Available frameworks
  • Undoable CounterPremiumBuild a counter with a history of the values and ability to undo/redo actions
    Available frameworks
  • Whack-A-MolePremiumBuild a popular arcade game where players attempt to hit moles as they pop up from holes in a board
    Available frameworks
  • Memory GamePremiumBuild a memory game where the player needs to match pairs of cards
    Available frameworks
  • Tic-tac-toe IIPremiumBuild an N x N tic-tac-toe game that requires M consecutive marks to win
    Available frameworks
  • Transfer List IIPremiumBuild a component that allows transferring of items between two lists, bulk selection/unselection of items, and adding of new items
    Available frameworks
  • WordlePremiumBuild Wordle, the word-guessing game that took the world by storm
    Available frameworks

Angular Interview Questions and Answers

Are you tired of generic interview prep resources that barely touch on the unique challenges of mastering Angular? Look no further. Our Angular-specific interview questions and answers are designed to help you become a confident and capable Angular developer.

Curated and answered by ex-FAANG interviewers with years of experience building Angular-based applications at scale, our collection ensures you’re fully prepared for interviews. From core Angular concepts to advanced techniques, every question comes with detailed explanations, example solutions, and practical tips. Our in-browser coding workspace provides instant feedback, so you can refine your skills and understand exactly how to improve.

Our comprehensive resource is divided into two categories: Angular Coding Interview Questions and Angular Quiz Interview Questions, providing a holistic approach to your preparation.

Angular Coding Interview Questions

Master essential Angular development techniques and patterns with our curated list of coding interview questions. These challenges are designed to prepare you for:

  1. Component design and reusability: Learn how to build modular and reusable Angular components to create scalable applications.
  2. Data binding and dependency injection: Understand Angular’s two-way data binding, property binding, and how dependency injection simplifies service integration.
  3. Directives and pipes: Leverage Angular’s built-in directives and pipes to manipulate the DOM and transform data effectively.
  4. Routing and navigation: Implement Angular Router to build dynamic, single-page applications with multiple views.
  5. State management: Manage application state using services or libraries like NgRx to handle complex stateful logic.
  6. Performance optimization: Use strategies like Ahead-of-Time (AOT) compilation, lazy loading, and change detection strategies to optimize application performance.

Each coding question includes:

  • Example solutions: Step-by-step implementations to guide you through solving the problem.
  • Automated test cases: Instantly validate your solutions, ensuring correctness and efficiency.
  • Best practices: Learn techniques to improve code readability, maintainability, and performance.

Our browser-based coding environment allows you to practice directly with Angular, with no setup required. You can see the results of your code in real-time, making it easier to grasp key concepts.

Example coding questions include:

  • How to create a reusable modal component in Angular?
  • How to handle reactive form validation with custom validators?
  • How to implement route guards for securing application routes?

These questions are designed to mirror real-world challenges, helping you build a robust understanding of Angular development.

Angular Quiz Interview Questions

Angular quiz questions focus on testing your knowledge of the framework’s fundamentals and advanced features. These trivia-style questions cover:

  1. Core concepts: Explore topics like Angular Modules, Components, and Services.
  2. Change detection: Understand how Angular’s change detection mechanism works and how to optimize it with OnPush strategy.
  3. Directives and pipes: Learn about structural and attribute directives and how to create custom pipes.
  4. Dependency injection: Master Angular’s hierarchical dependency injection system.
  5. Testing: Familiarize yourself with unit testing Angular components and services using tools like Jasmine and Karma.

Each quiz question includes:

  • Concise Answers (TL;DR): Quick solutions to help you respond confidently during interviews.
  • Detailed Explanations: Gain deeper insights to ensure you understand each concept and can articulate your answers clearly.

Example quiz topics include:

  • What is the difference between a structural directive and an attribute directive in Angular?
  • How does Angular’s Zone.js enable change detection?
  • What are the benefits of Ahead-of-Time (AOT) compilation in Angular?

These questions help you master the theoretical and practical aspects of Angular, giving you the confidence to handle any interview scenario.

Why Choose Our Angular Interview Questions?

  1. Credibility: All questions and answers are crafted by ex-FAANG engineers with years of experience in building large-scale Angular applications and interviewing top candidates.
  2. Comprehensive coverage: From fundamental concepts to advanced patterns, our resource covers every aspect of Angular development.
  3. Practical focus: Learn techniques directly applicable to real-world Angular projects, including dynamic forms, state management, and performance tuning.
  4. Interactive learning: Use our in-browser coding workspace to practice Angular problems with instant feedback, simulating real interview conditions.

By leveraging this resource, you’ll develop practical skills and theoretical knowledge that go beyond what’s typically covered in Angular tutorials, making you a standout candidate for any Angular-based role.

How These Questions Help You Excel

Our Angular interview questions are structured to help you:

  1. Master Angular fundamentals: Strengthen your understanding of components, directives, dependency injection, and the Angular ecosystem.
  2. Develop a problem-solving mindset: Approach Angular challenges systematically, breaking them into manageable steps.
  3. Gain hands-on experience: Practice Angular-specific coding problems and see your solutions come to life in an interactive environment.
  4. Communicate effectively: Prepare to explain your code and thought process clearly, a crucial skill for technical interviews.

Real-World Applications

The scenarios covered in this resource aren’t just theoretical. They reflect real-world challenges developers face when working with Angular, such as:

  • Building scalable and reusable components for complex user interfaces.
  • Managing application state effectively in large projects.
  • Debugging performance issues and optimizing change detection cycles.

By mastering these areas, you’ll not only be interview-ready but also equipped with the skills to excel on the job, making you a standout candidate for any front-end engineering role focused on Angular.