Ionic Framework Interview Questions

Checkout Vskills Interview questions with answers in Ionic Framework to prepare for your next job role. The questions are submitted by professionals to help you to prepare for the Interview.

Q.1 What is Ionic?
Ionic is an open source UI toolkit for building performant, high-quality mobile and desktop apps using web technologies — HTML, CSS, and JavaScript — with integrations for popular frameworks like Angular, React, and Vue.
Q.2 What is Ionic CLI ?
The Ionic Command Line Interface (CLI) is the tool for developing Ionic apps. Starting a new Ionic app is incredibly simple with CLI. From the command line, run the ionic start command and the CLI will handle the rest.
Q.3 What are Ionic lifecycle hooks?
Hooks are pieces of code that Cordova CLI executes at certain points in your Cordova/Ionic application build. Hooks can be used for example to manipulate files in our project, automatically add plugins into your application or as in the example above check for code errors in your files.
Q.4 Differentiate between the Ionic Framework v4 and v3?
Ionic 4 allows updates from each supported framework, whereas ionic 3 does not allow updates from the supported framework. The latest version of React and JavaScript is used in ionic 4, whereas ionic 3 does not use React and JavaScript. Ionic 4 was built to use the web components in the framework.
Q.5 What is benefit of Ionic?
The Ionic framework was designed to keep the simplicity and ease of using any framework. Its learning curve is easy. Less development time: With its inbuilt UI features, one can create beautiful UI apps within no time.
Q.6 How to test Ionic Applications?
Testing your Ionic app in a browser is as simple as running the serve command in your project's root folder. This will start a live-reload server for your project. When changes are made to any HTML, CSS, or JavaScript files, the browser will automatically reload when the files are saved.
Q.7 Does Ionic need Android studio?
Ionic team don't recommend using Android Studio for developing Ionic apps. Instead, it should only really be used to build and run your apps for the native Android platform and to manage the Android SDK and virtual devices
Q.8 How will you improve the 0Ionic app performance?
Keeping the app updated regularly and occasionally using source-map-explorer to identify further optimizations is useful for keeping performance in check over time. These are just a few examples of Ionic Angular performance optimizations you can make.
Q.9 Does Ionic have hot reloading?
No, Ionic lacks hot reload. With hot reload, you can pause the execution of a test app, apply fixes and then run the app again.
Q.10 What is lazy loading in Ionic?
Lazy loading refers to the process of loading chunks of code (such as a component, directive or pipe) when it's requested not when the app is loading. The most obvious benefit of lazing loading is the increased performance especially when the app is starting.
Q.11 How will you reduce the size of an ionic app?
Some ways to reduce the apk size are: minify the code, don't use Multiple libraries for same purpose, manifest the css and JavaScript files, compress images and remove unnecessary data / files from application.
Q.12 What is PhoneGap and Ionic?
PhoneGap powers the capabilities that permit web code to run when embedded into a native app shell, as well as accessing native device features (camera, Bluetooth, etc.) using JavaScript. While all of this is great, it's what PhoneGap doesn't give you that we are going to talk about today.
Q.13 How many types of storage available in Ionic framework?
The Ionic framework supports many types of storage which includes: HTML5 local storage, Cookie and session storage, indexedDB, WebSQL, PouchDB, Webservice/api storage and Cordova storage.
Q.14 Does ionic use angular or AngularJS?
Ionic also uses AngularJS for a lot of the core functionality of the framework. While you can still use Ionic with just the CSS portion, it is recommended in investing in Angular as it's one of the best ways to build browser-based applications today.
Q.15 How does angular and ionic work together?
Ionic works by embedding a web application inside of a native app by using Cordova. It's designed to work together with Angular to create a web application for the mobile environment, and includes support for mobile features like user interface controls and responding to touch input.
Q.16 How does angular and ionic work together?
Ionic works by embedding a web application inside of a native app by using Cordova. It's designed to work together with Angular to create a web application for the mobile environment, and includes support for mobile features like user interface controls and responding to touch input.
Q.17 Can you convert angular app to mobile app?
With Capacitor, any Angular app can be turned into an iOS and Android app with full access to native APIs and OS controls.
Q.18 How many default colors are in the Ionic framework?
Ionic has nine default colors that can be used to change the color of many components.
Q.19 How to use AOT and JIT by Ionic?
AOT stands for ahead of time compiler for compilation that compiles the app at build time. If we just use ionic cordova build platform (android or ios) then it will be JIT if we use prod flag I, E ionic cordova build platform --prod then it will use AOT.
Q.20 How to run ionic app on real Android devices?
To run the app, all you have to do is enable USB debugging and Developer Mode on the Android device, then run ionic cordova run android --device from the command line.
Q.21 How to debug an Ionic Windows app?
Open the device menu, and all available apps(or Web Views) or listed to debug. Also, make sure that the developer option is enabled on the actual device you use for debugging.
Q.22 What is Ionic Native?
Ionic Native is a TypeScript wrapper for Cordova/PhoneGap plugins that make adding any native functionality you need to the Ionic mobile app easy. Ionic Native is largely a set of community maintained plugins.
Q.23 Differentiate between ionic build and ionic prepare?
If you're using XCode to test and run your code, after you change some part of the code you just have to run ionic prepare to update the iOS project which then again you continue to use in XCode. ionic build command actually prepares the final code.
Q.24 Which Ionic life cycle event is fired when the component routing from is about to animate?
ionViewWillLeave event is fired when the component routing from is about to animate.
Q.25 What are the life cycle events in ionic?
The Ionic life cycle events are ionViewDidEnter, ionViewWillLeave and ionViewDidLeave
Q.26 What is Ionic header bar and where it is located?
The Ionic header bar is located on top of the screen. It can contain title, icons, buttons or some other elements on top of it.
Q.27 How do you prioritize Ionic framework related tasks?
Ionic framework based development involves many tasks on a day to day basis. Tasks also need to be prioritized to accomplish the organizational goals as per the specified KPIs (key performance indicators). Prioritization of tasks is done on the basis of various factors like: the tasks relevance, urgency, cost involved and resource availability.
Q.28 How you keep yourself updated of new trends in Ionic framework?
Ionic framework and application science are seeing newer development every year and I update myself by attending industry seminars, conferences as available online or offline.
Q.29 How do you see yourself in next five year in Ionic framework?
I foresee a bright future as I will gain more skills and knowledge in the domain of Ionic framework and application development by adding new technologies as needed by my organization.
Q.30 What are your strengths as a Ionic framework professional?
As a Ionic framework professional I am having extensive experience in the Ionic framework. I also have the requisite managerial skills for managing team and achieve the assigned tasks.
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