Prepare your Angular interview with questions including TS, ngRx and RxJS
- Javascript : the base of everything.
- Typescript : let’s leverage JS.
- Angular Framework : basics and advanced topics.
- RxJS : what about reactive programming.
- HTML / CSS : optional questions.
Indeed, What are basic Angular interview questions?
Angular Interview Questions
- Why were client-side frameworks like Angular introduced? …
- How does an Angular application work? …
- What are some of the advantages of Angular over other frameworks? …
- List out differences between AngularJS and Angular. …
- What is AOT compilation? …
- Explain Components, Modules and Services in Angular.
Then, What are pipes in Angular interview questions? What are Pipes in Angular? Pipes are simple functions that accept an input value and transform it based on the developer’s needs. There are predefined and user-defined pipes, they can be accessed using the pipe symbol “|”, and they can be chained together. Custom pipes can be defined using the PipeTransform interface.
What is Ng in Angular? The prefix ng stands for “Angular;” all of the built-in directives that ship with Angular use that prefix. Similarly, it is recommended that you do not use the ng prefix on your own directives in order to avoid possible name collisions in future versions of Angular.
In the same way What is bootstrap in Angular? Bootstrapping is a technique of initializing or loading our Angular application. let’s walk through our code created in Create your First new Angular project and see what happens at each stage and how our AppComponent gets loaded and displays “app works!”. The Angular takes the following steps to load our first view.
What is CLI in Angular?
The Angular CLI is a command-line interface tool that you use to initialize, develop, scaffold, and maintain Angular applications directly from a command shell.
What is interpolation in Angular?
Text interpolation lets you incorporate dynamic string values into your HTML templates. Use interpolation to dynamically change what appears in an application view, such as displaying a custom greeting that includes the user’s name.
What is lazy loading in Angular?
Lazy loading is the process of loading components, modules, or other assets of a website as they’re required. Since Angular creates a SPA (Single Page Application), all of its components are loaded at once. This means that a lot of unnecessary libraries or modules might be loaded as well.
Which file runs first in Angular?
html: This is the entry file which holds the high level container for the angular application. main. ts: As defined in angular. json file, this is the main ts file that will first run.
Where is Ng serve run?
ng serve. To get the application running, the ng serve command must execute within the [name-of-app] folder. Anywhere within the folder will do. The Angular CLI must recognize that it is within an environment generated with ng new .
What is decorator in Angular?
Decorators are a design pattern that is used to separate modification or decoration of a class without modifying the original source code. In AngularJS, decorators are functions that allow a service, directive or filter to be modified prior to its usage.
What is the difference between npm start and Ng serve?
It seems like ng serve starts the embedded server whereas npm start starts the Node servers.
What is 2way binding?
Two-way binding means that any data-related changes affecting the model are immediately propagated to the matching view(s), and that any changes made in the view(s) (say, by the user) are immediately reflected in the underlying model. When app data changes, so does the UI, and conversely.
What is directive in Angular?
Directives are classes that add additional behavior to elements in your Angular applications. Use Angular’s built-in directives to manage forms, lists, styles, and what users see. See the live example / download example for a working example containing the code snippets in this guide.
What is a property in Angular?
In Angular 7, property binding is used to pass data from the component class (component. ts) and setting the value of the given element in the user-end (component. html). Property binding is an example of one-way databinding where the data is transferred from the component to the class.
What is imports in Angular?
An import is what you put in the imports property of the @NgModule decorator. It enables an Angular module to use functionality that was defined in another Angular module. An export what you put is the exports property of the @NgModule decorator.
What is guard in Angular?
Guards in Angular are nothing but the functionality, logic, and code which are executed before the route is loaded or the ones leaving the route. Different types of guards, CanActivate guard (e.g. it checks route access). CanActivateChild guard (checks child route access).
What is Ivy in Angular?
Ivy is a complete rewrite of Angular’s rendering engine. In fact, it is the fourth rewrite of the engine and the third since Angular 2. But unlike rewrites two and three, Ivy promises huge improvements to your application. With Ivy, you can compile components more independently of each other.
What is life cycle hooks in Angular?
Lifecycle hooks are a special functionality in Angular that allow us to “hook into” and run code at a specific lifecycle event of a component or directive. Angular manages components and directives for us when it creates them, updates them, or destroys them.
Is index HTML necessary in Angular?
You can see that the selector property contains the string as index. html file. This information is required the Angular to place this part into an index.
What is ts file in Angular?
TypeScript is a primary language for Angular application development. It is a superset of JavaScript with design-time support for type safety and tooling. Browsers can’t execute TypeScript directly. Typescript must be “transpiled” into JavaScript using the tsc compiler, which requires some configuration.
What is Webpack in Angular?
Create Angular applications with a Webpack based tooling. Webpack is a popular module bundler, a tool for bundling application source code in convenient chunks and for loading that code from a server into a browser.
What is difference between npm and Ng?
NPM is basically a package manager which acts as a dependency provider. If there are many small packages, required to build a large one, NPM is the one hotspot which will provide us with the packages. Angular-CLI is one of those packages. As far as NG is concerned, it is the core module of Angular.
How do you end ng serve?
- Thanks you that helped me. If you are on Windows, just open the task manager and kill the node.exe process. …
- taskkill /F /IM node.exe (Careful: this force closes all instances of node.exe on Windows) – kirodge. …
- thanks for this. this is what i needed since my app was still running even after shutting down webstorm.
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