10+ Senior Angular Developer Interview Questions and Answers

Dependency Injection in Angular allows for the injection of dependencies into components, services, and other Angular constructs.

• Dependency Injection is a design pattern in which a class receives its dependencies from external sources rather than creating them itself.

• @Self decorator specifies that the dependency should be resolved from the current component or directive, rather than looking up the hierarchy.

• @SkipSelf decorator specifies that the dependency should be resolved ...read more

Sort and remove duplicates from an array of strings in JavaScript.

• Use the Array.prototype.sort() method to sort the array.

• Use the Set object to remove duplicates from the sorted array.

• Convert the Set back to an array using the spread operator.

I have worked on Angular versions 2, 4, 6, 8, 10, and 12.

• Worked on Angular 2, which introduced components, modules, services, and directives.

• Experience with Angular 4, which focused on making the framework faster and smaller.

• Familiar with Angular 6, which introduced Angular Elements and Angular CLI v6.

• Proficient in Angular 8, which brought improvements in Ivy rendering engine and differential loading.

• Hands-on experience with Angular 10, which introduced stricter types and imp...read more

Angular offers advantages such as two-way data binding, dependency injection, and modular architecture.

• Two-way data binding allows automatic synchronization of data between the model and the view

• Dependency injection helps manage components and their dependencies easily

• Modular architecture promotes code reusability and maintainability

• Angular provides a rich ecosystem of tools and libraries for development

• Angular CLI simplifies project setup and maintenance

Denouncing and throttling are techniques used to control the rate at which a function is called.

• Denouncing is the practice of ignoring repeated calls to a function until a certain amount of time has passed.

• Throttling limits the rate at which a function can be called, ensuring it is not called more than once within a specified time interval.

• These techniques are commonly used in front-end development to optimize performance and prevent excessive function calls.

• Example: Denounci...read more

Compilation process is the process of converting source code into machine code by a compiler.

• Source code is written in a high-level language like TypeScript or JavaScript.

• Compiler translates the source code into intermediate code.

• Intermediate code is then converted into machine code by the compiler.

• Compilation process checks for syntax errors and generates executable code.

• Examples of compilers include Angular CLI for Angular applications and TypeScript compiler for TypeScript...read more

Session Storage is a web storage API that allows data to be stored and accessed during a single session.

• Session Storage is a type of web storage that stores data for a single session only.

• Data stored in Session Storage is accessible only within the same tab or window.

• Session Storage data is cleared when the tab or window is closed.

• Session Storage is useful for storing temporary data that needs to be available during a user's visit to a website.

There are two types of compilations in Angular: Just-in-Time (JIT) compilation and Ahead-of-Time (AOT) compilation.

• Just-in-Time (JIT) compilation: Compiles the Angular application in the browser at runtime. Slower startup time but easier development process.

• Ahead-of-Time (AOT) compilation: Compiles the Angular application during the build process before the browser downloads and runs the code. Faster startup time but requires more setup and configuration.

Angular is a popular open-source web application framework developed by Google for building dynamic single-page applications.

• Angular is based on TypeScript, a superset of JavaScript.

• It uses components to build the user interface.

• Angular provides features like data binding, dependency injection, and routing.

• It has a powerful CLI for scaffolding and managing projects.

• Angular is commonly used for building interactive web applications.

Routing in Angular is the process of navigating between different components or views based on the URL.

• Routing allows users to navigate between different parts of an Angular application without reloading the entire page.

• Routes are defined in the app-routing.module.ts file using the RouterModule and Routes classes.

• Each route maps a URL path to a component, which is then displayed when the corresponding URL is accessed.

• Angular Router provides features like route guards, lazy lo...read more

Angular life cycle includes initialization, change detection, content projection, and destruction.

• Initialization: ngOnInit is called after the component is initialized.

• Change Detection: Detects changes in component properties and updates the view.

• Content Projection: Projects external content into the component.

• Destruction: ngOnDestroy is called before the component is destroyed.