{"id":5047,"date":"2023-04-19T08:11:54","date_gmt":"2023-04-19T08:11:54","guid":{"rendered":"https:\/\/unremot.com\/blog\/?p=5047"},"modified":"2023-04-19T09:39:16","modified_gmt":"2023-04-19T09:39:16","slug":"top-15-angular-basic-interview-questions","status":"publish","type":"post","link":"https:\/\/unremot.com\/blog\/top-15-angular-basic-interview-questions\/","title":{"rendered":"Top 15 Angular basic interview questions"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Here are Top 15\u00a0 Angular basic interview questions along with their answers.<\/span><\/p>\n\n<p><span style=\"font-weight: 400;\">Angular is a powerful front-end JavaScript framework that is frequently utilized in the creation of apps. Because of its growing popularity, Angular developers are in high demand. In this blog post we have covered some frequently asked Angular interview questions. We have classified the questions based on experience levels and have added scenario based and interview questions on Angular as well.\u00a0<\/span><\/p>\n<h2><b>Angular basic interview questions<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">A set of basic Angular interview questions is a great source for a recruiter or someone who is preparing for an interview. Here are top 10 Angular interview questions along with their answers. Interviewers frequently ask these questions to potential Angular developers to gauge their level of fundamental understanding of the framework. The questions in this section help you in grasping the fundamental ideas of Angular programming. The top Angular basic interview questions are below.<\/span><\/p>\n<p style=\"text-align: center;\"><strong>Also read:<\/strong> <a href=\"https:\/\/hbr.org\/2021\/11\/10-common-job-interview-questions-and-how-to-answer-them\" target=\"_blank\" rel=\"noopener\">10 Common Job Interview Questions and How to Answer Them<\/a><\/p>\n<h3><strong>1. Explain data binding in Angular and what are its forms?<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Data binding is a technique for defining how a component and DOM will communicate. As a result, creating interactive applications is simple and doesn&#8217;t need retrieving or sending data. You can use Angular&#8217;s data binding to consider the model as a single source and any modifications to the model will be immediately projected into view. There four types of data binding depending on the way data flows \u2013\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">String Interpretation<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Property Binding<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Event Binding<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Two-way data binding.<\/span><\/li>\n<\/ul>\n<h3><strong>2. What are directives?<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Directives are the best properties for changing the DOM\u2019s behavior when rendering a template. The directives let you specify how DOM elements should behave, or just what will happen when the mouse is hovered over or clicked. Built-in directives start with ng-prefix, some built-in directives start with ngif and ngFor. You can always write your own directives to suit your own demand.<\/span><\/p>\n<h3><strong>3. What is the latest version of Angular and how it is different from Angular Js?<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">The latest version of Angular 14 was released on June 2022. Google developed Angular JS it is the most primitive version Angular. Difference are as follows &#8211;\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The primitive AngularJS is based on JavaScript while Angular uses Typescript. <\/span><span style=\"font-weight: 400;\">While both Angular and AngularJS use Directives, how they use them makes the difference.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Angular has standard Directives while AngularJS has a pack of them.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Angular provides mobile support while AngularJS does not provide mobile support.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">AngularJS supports Model-view-controller design while Angular uses components and directives.\u00a0<\/span><\/li>\n<\/ul>\n<h3><strong>4. What is Do Bootstrap (ng BootStrap) in Angular?<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Do Bootstrap is a new life-cycle hook for manual bootstrapping of the applications instead of using bootstrap array in @NgModule annotation.\u00a0<\/span><\/p>\n<h3><strong>5. What are the key components of Angular?<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">The key components of Angular are components, modules, services, and Metadata.\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Components are fundamental units that manage HTML views.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Module are a collection of building blocks \u2013 components, directives, and others. Each logical section of code is called Module.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Template show the view of the Angular application.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Metadata allows you to add more data in an Angular class.<\/span><\/li>\n<\/ul>\n<h3><strong>6. What is deep linking in Angular?<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Deep linking is a technique of directing users to specific page without going to the home page of the website.\u00a0 Coders use deep linking in Angular to effortlessly link their pages in search engines.\u00a0<\/span><\/p>\n<h3><strong>7. Explain ng-content, ng-container and ng- template?<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">The &lt;ng-template&gt; is a template element that Angular uses with structural directives (*ngIf, *ngFor, [ngSwitch] and custom directives).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The &lt;ng-container&gt; is a grouping element.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">As Angular doesn\u2019t put it in DOM, it does not interfere with styles or layout.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">The &lt;ng-content&gt; is used to create configurable components. It can create components that can be configured depending on the needs of its user. Components that are used in published libraries make use of &lt;ng-content&gt; to make themselves configurable.<\/span><\/p>\n<h3><strong>8. What is lazy loading?<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Lazy loading is a technique used to load JavaScript components when a particular route is active. This technique is effective when you have numerous components because it increases performance during the first load. Thanks to lazy loading, the most recent versions of Angular allow applications to be load modules only when required. Other benefits of lazy loading are enhancing the application\u2019s size and performance.\u00a0<\/span><\/p>\n<h3><strong>9. What are the advantages of Angular CLI commands?<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Some of the best Angular CLI commands that enhances developers\u2019 productivity are<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">ng-new \u2013 Generate new Angular projects<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">ng-generate \u2013 Generate components using the Angular CLI<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">ng-serve \u2013 Run your app with just this command<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">ng-eject \u2013 Pull the ripcord<\/span><\/li>\n<\/ul>\n<h3><strong>10. Explain the difference between an Annotation and a Decorator in Angular?<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Annotations in Angular are used to build annotation array. While decorators are design patterns and functions that receive the decorated object. Decorator have the ability to make modifications to the received decorated object without changing the original source code. Additionally, the sole metadata set of the class that uses the Reflect Metadata library is annotations.<\/span><\/p>\n<p style=\"text-align: center;\"><strong>Also read:\u00a0<a href=\"https:\/\/unremot.com\/blog\/spring-boot-interview-questions\/\">Spring Boot Interview Questions<\/a><\/strong><\/p>\n<h2><b>Angular scenario-based interview questions<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Interviewers ask Angular scenario-based interview questions because they help ascertain the candidate\u2019s practical knowledge and apply their theoretical understanding of Angular to real-world scenarios. Angular scenario-based interview questions for experienced professionals are an excellent way to determine if they will be a good fit for your firm.\u00a0<\/span><\/p>\n<h3><strong>1. How do you choose an element from a component template?<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">To directly access items in the view, use the @ViewChild directive. Consider an input item with a reference.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">&lt;input #example&gt;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">and construct a view child directive that is accessed in the ngAfterViewInit lifecycle hook<\/span><\/p>\n<p><span style=\"font-weight: 400;\">@ViewChild(&#8216;example&#8217;) input;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">ngAfterViewInit() {<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0\u00a0console.log(this.input.nativeElement.value);<\/span><\/p>\n<p><span style=\"font-weight: 400;\">}<\/span><\/p>\n<h3><strong>2. How do you deal with errors in observables?<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Instead of depending on try\/catch, which is useless in an asynchronous context, you may manage problems by setting an error callback on the observer.<\/span><\/p>\n<p><b>Example:\u00a0<\/b><span style=\"font-weight: 400;\">You may create an error callback as shown below.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">myObservable.subscribe({<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0\u00a0\u00a0 next(number) { console.log(&#8216;Next number: &#8216; + number)},<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0\u00a0\u00a0 error(err) { console.log(&#8216;An error received &#8216; + err)}<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0\u00a0});<\/span><\/p>\n<p style=\"text-align: center;\"><strong>Also read:\u00a0\u00a0<a href=\"https:\/\/unremot.com\/blog\/technical-interview-questions\/\">Technical Interview Questions | Top 30 critical questions\u00a0<\/a><\/strong><\/p>\n<h2><strong>Angular RxJs interview questions<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">Angular RxJs interview questions provide valuable insight into the applicant\u2019s technical, problem-solving skills. Some RXJs interview questions for Angular developer are \u2013<\/span><\/p>\n<h3><strong>1. What is RxJS?<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">RxJS is a library for reactive Streams which can be used to deal with asynchronous data streams and events called &#8220;Reactive Extensions for JavaScript&#8221; (RxJS). <\/span><span style=\"font-weight: 400;\">RxJS uses JavaScript reactive programming. Developer use it widely because it simplifies writing asynchronous code.<\/span><\/p>\n<h3><strong>2. What are RxJS Operators?<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">A stream is a key part of reactive programming. An operator is essentially a method that acts on an Observable and modifies the stream in some way. The function of an operator is to change or filter initially emitted values in accordance with the requirements of the project tasks.<\/span><\/p>\n<h2><b>Angular MCQ questions<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">MCQ questions are popular in interviews because the Angularjs objective questions offer a structured manner to evaluate a candidate\u2019s knowledge, abilities, and understanding concepts. Angular MCQ questions can determine the candidate\u2019s critical thinking ability. Angular 4 multiple choice questions is a great way to filter candidates in the preliminary screening process.\u00a0<\/span><\/p>\n<h3><strong>1. Which of the following statement is correct for AngularJS?<\/strong><\/h3>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">AngularJS is an HTML framework<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">AngularJS is a Java framework<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">AngularJS is a JavaScript framework<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">AngularJS is a SQL framework<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">Answer C = AngularJS is a JavaScript framework<\/span><\/p>\n<h3><strong>2. What is the architecture platform is Angular JS based on?<\/strong><\/h3>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Decorator Pattern<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Observer Pattern<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">MVVM architecture pattern\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">MVC architecture pattern\u00a0<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">Answer c \u2013 Angular JS is based on MVVM architectural plan or Model-View-ViewModel<\/span><span style=\"font-weight: 400;\">\u00a0(MVVM) pattern.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Here are Top 15\u00a0 Angular basic interview questions along with their answers. Angular is a powerful front-end JavaScript framework that is frequently utilized in the creation of apps. Because of its growing popularity, Angular developers are in high demand. In this blog post we have covered some frequently asked Angular interview questions. We have classified [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":5072,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rank_math_lock_modified_date":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[76],"tags":[],"class_list":{"0":"post-5047","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-technology","8":"entry"},"_links":{"self":[{"href":"https:\/\/unremot.com\/blog\/wp-json\/wp\/v2\/posts\/5047","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unremot.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unremot.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unremot.com\/blog\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/unremot.com\/blog\/wp-json\/wp\/v2\/comments?post=5047"}],"version-history":[{"count":3,"href":"https:\/\/unremot.com\/blog\/wp-json\/wp\/v2\/posts\/5047\/revisions"}],"predecessor-version":[{"id":5051,"href":"https:\/\/unremot.com\/blog\/wp-json\/wp\/v2\/posts\/5047\/revisions\/5051"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/unremot.com\/blog\/wp-json\/wp\/v2\/media\/5072"}],"wp:attachment":[{"href":"https:\/\/unremot.com\/blog\/wp-json\/wp\/v2\/media?parent=5047"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unremot.com\/blog\/wp-json\/wp\/v2\/categories?post=5047"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unremot.com\/blog\/wp-json\/wp\/v2\/tags?post=5047"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}