Angular 5 Interview Questions For Experienced

Here you will get tough angular 5 interview questions with answers for experienced.Now a days all the MNC are seeking for angular 4,5 skills candidates. So you need to carefully prepare based on the different version of angular.

What Is AngularJS 5?
What are the additional features in angular js 5?
How to update httpclient in Angular js 5?
What is the Built Optimizer in Angular js 5 ?
How Preserve Whitespace in Angular 5?
What are the life Cycle event in angular 5?
What are the performance level updatations in angular 5?
What is i18N Pipes in Angular 5?
What is AOT in angular 5?
What is Just-in-Time (JIT) in angular 5?
Why Compile with AOT is better in angular 5?
What are the security principle should be implemented at time of app building in angular 5?

What Is AngularJS 5?

It’s a advanced version of angularjs 4 which have some modified features.Angular Team keep trying to update this angularjs. Angular 5 is released in Oct 2017. It a nothing but a typescript (subset of javascript) library which developed by google team for development of  faster and dynamic mobile apps and desktop applications.

What are the additional features in angular js 5?

1. Build-optimizer.
2. Compiler Improvements( Make AOT the default )
3. Angular Universal State Transfer
4. New Router Lifecycle Events
5. HttpClient
6. Improvement on XSRF Protection
7. Remove *.ngfactory.ts files
8. Type checking in templates
9. AppShell
10.Preserve Whitespace

How to update httpclient in Angular js 5?

You update the HTTPClient in 3 easy steps:
1. Replace HttpModule with Http Client Module from @angular/common/http.
2. Inject the HttpClient service
3. Remove any map(res =>res.json()) calls, which are not required no more.

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What is the Built Optimizer in Angular js 5 ?

Objective of Built Optimizer is to reduce size of bundle to make better performance.
Its make smaller size of typescript file as well.

How Preserve Whitespace in Angular 5?

In previous version there is no restriction for removing whitespace,tabs while creating applications, It comes unnecessarily and developer has to removed manually but In angular 5 has the restrictions. just have a look below examples
Example: If you want to restrict from homepage component , then..

Example :
If you want to restrict from globally throughout the application then need to set piece of code in config.json file.

What are the life Cycle event in angular 5?

  • In angular 5 updated 4 kind of event for Guards anD Resolve.
  •  GuardsCheckStart
  •  GuardsCheckEnd
  •  ResolveStart and
  •  ResolveEnd

What are the performance level updatations in angular 5?

  •  It uses addEventListener for faster rendering.
  • Remove decorator DSL
  • Switch Angular to use Static-Injector instead of Reflective-Injector
  • Improvements on Lazy loading for Angular.
  • Improved Universal & AppShell Support in the CLI
  • UpdateOn Blur / Submit

What is i18N Pipes in Angular 5?

The i18n pipes that set of built-in functionality makes internationalization or changes based on location of date, number, currency. etc.

What is AOT in angular 5?

It stands for Ahead-of-Time. It’s a compiler which converts HTML and TypeScript code into executable JavaScript code during the build.

What is Just-in-Time (JIT) in angular 5?

It’s a compiler which converts HTML and TypeScript code into executable JavaScript code at runtime.

Why Compile with AOT is better in angular 5?

  • Faster rendering
  • Fewer asynchronous requests
  • Smaller Angular framework download size
  • Detect template errors earlier
  • Better security

What are the security principle should be implemented at time of app building in angular 5?

1. Never use directly DOM APIs.
2. Enable Content Security Policy (CSP)
3. Preventing CSRF or XSRF attacks.
4. Use DOM Sanitizer.
5. Use the offline template compiler

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