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Angular 7 interview questions

Angular 7 interview questions

Angular 7 is a JavaScript web application development framework used to create Single Page Applications (SPAs). This is one of the foremost front-end development frameworks which has been regularly updated by the Angular team of Google. The development of Angular 7 framework is based on several components forming a tree structure hierarchy with parents and child components. If you are scrolling on the web for Angular 7 interview questions and answers for experienced pdf, then this guide will gonna help you. Angular 7 has attractive features and standardized specifications such as core Framework, major partner launches, and synchronized significant versions of CLI, advanced chains and Angular material.

Additionally, Angular 7 contains a number of advanced features namely CLI prompts, Component Dev Kit (CDK), drag and drop, virtual Scrolling and improvement in application performance. Given listed questions are the widely asked Angular 7 interview questions.

Features of Angular 7

  • Enhanced application performance
  • Angular material and component dev kit
  • Virtual scrolling & Drag and drop
  • Improved accessibility for selects
  • CLI prompt

Angular 7 is a widely used JavaScript web application development framework. The Angular 7 framework improves the upgrading process. In this blog post commonly asked Angular 7 interview questions are discussed with appropriate answers

Last update: 06 Oct 2019, 8 Questions and Answers

Most Frequently Asked Angular 7 interview questions And Answers With Examples:

The main difference between Angular 7 and Angular 6 is -
Differentiable parameters Angular 7 Angular 6
Features The main features that Angular 7 contains are- CLI prompts, Angular Material, Component Dev Kit (CDK), Virtual scrolling, and Application Performance Improvements, Angular Material, etc. The main features that Angular 6 contained are- Angular CLI Workspaces, ng update, ng add, Angular Elements, Animations Performance Improvements, Bazel compiler, service worker safety, etc.
Prime focus Angular 7 primarily focused on upgrading the existing features rather than publishing advanced level features. Angular 6 primarily focused on adding new features and bring new extensible upgrades.
Angular Material and Components Dev Kit (CDK) The Angular 7 framework has minor changes in the improvement of material design. The Angular 6 framework has major changes in the improvement of material design.
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Angular 7 has new and advanced level features such as

  • Modernized v7.0.2 CLI prompts
  • Reflect- metadata poly-fill part for application performance
  • Angular material and CDK ( Component Dev Kit)
  • Virtual scrolling package
  • Drag and Drop <@angular/cdk/drag-drop>
  • Angular compatibility compiler (ngcc)
  • angular Do-bootstrap
  • improved error handling
  • dependency updates etc

In addition to all these features, Angular 7 also provides Documentation updates which include Angular console, @angular/Fire, NativeScript, StackBlitz, and Bazel, platform- browser, etc.

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Steps to update Angular 6 to Angular 7 are
  • Remove deprecated features and components of RxJS 6 with the help of auto-update rules from rxjs-tslint.
  • Install the tool by using command npm install –g rxjs-tslin
  • From the root of your project run rxjs-5-to 6-migrate –p scr/tsconfig.app.json
  • remove rxjs-compat library from rxjs-5-to 6-migrate –p scr/tsconfig.app.json
  • Run command ng update @angular/cli@angular/core

Your Angular version gets updated to v7

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UrlSegment is a modified feature of Angular 7 which is used to add a new interface. In other words, UrlSegment Interface feature represents URL segment, constructor, properties and methods which are present in UrlSegment class. Moreover, UrlSegement is one of the parts of URL, as it contains metric and path parameters which are associated and interlinked with the segment.

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In Angular 7, templates are written with the help of HTML that contains Angular JS specification elements and attributes. The main role of Angular 7 is to combine the templates which ultimately control the dynamic view that is visible to the users in the browsers.

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Structural directive

The main function of the structural directive is to shape and re-shape the HTML layout, and DOM’s structure. The modification and customization of HTML layout are done by adding, removing and manipulating the selected HTML elements.

Attribute directives

The attribute directive has its own layout view and styles because it has a single component on a host element but it supports multiple directives.

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Angular 7 has two core dependencies namely RxJS and TypeScript
  • RxJS 6.3 – Angular 7 framework uses RxJS version 6.3.
  • TypeScript- Angular 7 framework uses TypeScript version 3.1
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In order to set headers for every request in Angular 7, HTMLHttpRequest is used. There is a number of benefits such as testability features, types request, request and response interception, observable APIs and streamlined error handling that is associated with, XMLHttpRequest.

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