Advanced Angular 4 Interview Questions
Advanced Angular 4 Interview Questions for Experienced Developers
Advanced Angular 4 Interview Questions
Advanced Angular 4 interview questions delve into the intricate details of the framework, exploring concepts such as reactive programming, dependency injection, routing optimization, and performance tuning. These questions are particularly useful for evaluating candidates with a deep understanding of Angular's architecture and its advanced capabilities, as they require a comprehensive grasp of the framework's inner workings and its application in complex enterprise-grade applications.
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1 - Explain Dependency Injection (DI) in Angular 4.
DI is a mechanism that provides instances of required services/components to classes.
2) What are the different types of DI provided by Angular 4?
Constructor injection, Setter injection, Method injection.
3) What is the difference between a Service and a Component in Angular 4?
A service is a class that provides functionality to other components, while a component is a UI element.
4) What are the different life cycle hooks in Angular 4?
ngOnInit, ngOnDestroy, ngDoCheck, ngAfterContentInit, ngAfterContentChecked, ngAfterViewInit, ngAfterViewChecked.
5) What is a ViewChild and a ContentChild decorator?
ViewChild is used to access a child component from its parent, while ContentChild is used to access a component from its parent's content.
6) What is the difference between the @Input and @Output decorators?
@Input is used to pass data into a component, while @Output is used to emit events from a component.
7) What is the concept of a Change Detection Strategy?
Change Detection determines how Angular tracks changes in a component and its children.
8) What is the significance of the OnPush Change Detection Strategy?
OnPush optimizes performance by only checking for changes when an input property or event is updated.
9) Explain the difference between @Attribute and @HostBinding decorators.
@Attribute is used to get the value of an attribute from the DOM, while @HostBinding is used to bind a property to a DOM element.
10) What is the purpose of Router Guards in Angular 4?
Router Guards allow you to control when and how a route is activated.
11 - Explain the concept of a Resolver in Angular 4.
Resolvers are used to fetch data before a route is activated.
12) What are the different navigation strategies provided by the Router?
NavigationExtras, UrlTree, UrlSegment.
13) Explain the role of Forms in Angular 4.
Forms provide a structured way to manage user input.
14) What are the different types of form controls in Angular 4?
FormControl, FormGroup, FormArray.
15) How can you handle form validation in Angular 4?
By using the built in validators or creating custom validators.
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- Course Overview
- This course delves into advanced Angular 4 interview questions, covering complex topics such as dependency injection, change detection, performance optimization, unit testing, and modern architectural patterns. It provides comprehensive explanations, real-world examples, and practice exercises to help you answer interview questions confidently and showcase your skills in advanced Angular development.
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Functional Tools
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3) Angular Material: A library of pre built Angular components and templates that provide a consistent design and functionality across applications. It includes a wide range of UI elements such as buttons, inputs, lists, and tabs to expedite development and ensure a user friendly experience.
4) RxJS: A reactive programming library that enables handling of asynchronous data in Angular applications. It provides operators and observables to manage data streams efficiently and respond to changes in a reactive manner, improving application responsiveness and performance.
5) Redux (or NgRx): A state management pattern that helps organize the application state and manage changes in a predictable and scalable way. It provides a central store to keep application data and enables actions to update the state, ensuring data consistency and preventing side effects in the application.
6) Jest: A testing framework that provides comprehensive unit and integration testing capabilities for Angular applications. It allows for writing modular tests, isolating dependencies, and mocking external dependencies to ensure the correctness and reliability of the application's functionality.
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