Cordova Technical Interview Questions: If you are preparing for a technical interview focused on Cordova, it is crucial to have a thorough understanding of the subject and be prepared to answer some tough questions. To help you out, we have compiled a comprehensive list of the Top 100 Cordova Interview Questions and Answers.
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Cordova Interview Questions and Answers
Our collection of questions covers the latest Cordova interview questions that are relevant in today’s job market, and is suitable for both freshers and experienced professionals. Whether you are a beginner or an expert in Cordova, our list of Cordova Interview Questions for Freshers will surely help you prepare for your upcoming interview.
Top 100 Cordova Interview Questions and Answers 2023
1. What is Apache Cordova?
Ans: Apache Cordova is an open-source mobile development framework used for building mobile applications using HTML, CSS, and JavaScript.
2. What is PhoneGap?
Ans: PhoneGap is a distribution of Apache Cordova, which includes additional tools and services that simplify the mobile app development process.
3. What are the advantages of using Cordova?
Ans: The advantages of using Cordova include:
- Cordova is a platform that enables the development of hybrid mobile applications that can be used on various mobile platforms such as IOS, Android, Windows Phone, Amazon-Fireos, BlackBerry, Firefox OS, Ubuntu, and Tizien.
- Developing with Cordova is faster than building native applications, which can save a considerable amount of time.
- When working with Cordova, users can use JavaScript, eliminating the need to learn and use platform-specific programming languages.
- There are numerous community add-ons, libraries, and frameworks that are optimized for use with Cordova, providing users with a wealth of resources for building mobile applications.
4. What are the features of Cordova?
- The Command Line Interface (CLI) in Cordova is a useful tool for starting projects, developing processes for different platforms, and installing plugins.
- Cordova provides a set of core components that are necessary for building a mobile application.
- Cordova plugins offer APIs that allow developers to implement native mobile functions into their JavaScript applications.
- Cordova is licensed under the Apache License, version 2.0, and the Apache feather logos are trademarks of The Apache Software Foundation.
5. What are plugins in Cordova?
Ans: Plugins in Cordova are JavaScript modules that provide access to native device features such as camera, GPS, and accelerometer.
6. How do you install a plugin in Cordova?
Ans: Plugins can be installed in Cordova using the Cordova CLI command “cordova plugin add plugin-name”.
7. What is the difference between Cordova and React Native?
Ans: Cordova is a hybrid mobile development framework, while React Native is a framework for building native mobile apps using JavaScript.
8. What are the limitations of Cordova?
- While Cordova offers many benefits, it also has some limitations.
- Hybrid applications built with Cordova are generally slower than native ones, so it may not be the best choice for large applications that require extensive data and functionality.
- Cross-browser compatibility can be a challenge when developing applications for different platforms, and testing and optimization can require a significant amount of time and effort to cover a large number of devices and operating systems.
- Some plugins may have compatibility issues with different devices and platforms, and there are still some native APIs that are not supported by Cordova.
9. What is the mechanism of Cordova?
- The user interface of a Cordova application is essentially a webview that occupies the entire screen and runs within a native container.
- The webview used by Cordova is the same one used by the native operating system, which means that only the native container is modified based on the operating system, while the web pages remain the same.
- Since web browsers that render web pages can vary from one operating system to another, the webview used by Cordova also varies depending on the platform.
- On iOS, the UIWebView class is used, while on Android, the android.webkit.webview class is used, and on Windows, the WebViewClass is used.
10. How do you handle network connectivity in a Cordova app?
Ans: Network connectivity can be handled in a Cordova app using the Cordova network information plugin.
11. What are the differences between Cordova and PhoneGap plugins?
| Cordova | PhoneGap |
| Cordova plugins are open source and community-maintained, and can be downloaded from the Cordova plugin registry. PhoneGap plugins are mostly proprietary and developed by Adobe, with some community contributions. | PhoneGap plugins are mostly proprietary and developed by Adobe, with some community contributions. Cordova plugins are open source and community-maintained, and can be downloaded from the Cordova plugin registry. |
12. What is the Cordova geolocation plugin used for?
Ans: The Cordova geolocation plugin provides access to the device’s GPS, allowing the app to get the user’s current location.
13. What is the Cordova splash screen plugin used for?
Ans: The Cordova splash screen plugin is used to display a splash screen while the app is loading.
14. What is the Cordova whitelist plugin used for?
Ans: The Cordova whitelist plugin is used to restrict access to external domains, providing a security layer for the app.
15. How do you build a Cordova app for iOS?
Ans: To build a Cordova app for iOS, you need to have Xcode installed on your machine and use the Cordova CLI command “cordova build ios”.
16. What is the Cordova device plugin used for?
Ans: The Cordova device plugin provides access to device information such as the device model, platform, and version.
17. What is the purpose of the Cordova SQLite plugin?
Ans: The Cordova SQLite plugin provides access to a local SQLite database, allowing the app to store data locally on the device.
18. How do you add a platform to a Cordova project?
Ans: To add a platform to a Cordova project, you can use the Cordova CLI command “cordova platform add platform-name”.
19. What is the difference between a Cordova plugin and a Cordova platform?
Ans: A Cordova plugin provides access to native device features, while a Cordova platform is a specific mobile platform such as iOS or Android.
20. How do you test a Cordova app on a device?
Ans: To test a Cordova app on a device, you can use the Cordova CLI command “cordova run platform-name”, where platform-name is the name of the platform you want to test on.
21. How do you customize the icon and splash screen for a Cordova app?
Ans: You can customize the icon and splash screen for a Cordova app by editing the config.xml file and providing the appropriate image files.
22. What are the differences in community support between Cordova and PhoneGap?
| Cordova | PhoneGap |
| Cordova has a larger and more active community than PhoneGap, which means that there are more resources and support available for developers who use Cordova. | PhoneGap has a smaller and less active community than Cordova, which means that there are fewer resources and support available for developers who use PhoneGap. |
23. How do you handle errors in a Cordova app?
Ans: Errors in a Cordova app can be handled using try-catch blocks or by using the Cordova Globalization plugin to display error messages in the user’s language.
24. How do you create a Cordova plugin?
Ans: To create a Cordova plugin, you need to create a JavaScript file that provides access to the native device feature and a plugin.xml file that describes the plugin.
25. How do you publish a Cordova plugin?
Ans: Cordova plugins can be published to the Cordova Plugin Registry or to a private repository.
26. What is the Cordova barcode scanner plugin used for?
Ans: The Cordova barcode scanner plugin provides access to the device’s camera, allowing the app to scan barcodes.
27. What is the Cordova media plugin used for?
Ans: The Cordova media plugin provides access to the device’s media player, allowing the app to play audio and video files.
28. What is the Cordova file transfer plugin used for?
Ans: The Cordova file transfer plugin is used to upload and download files from remote servers.
29. How do you customize the app theme in a Cordova app?
Ans: The app theme in a Cordova app can be customized using CSS styles.
30. How do you handle user input in a Cordova app?
Ans: User input in a Cordova app can be handled using HTML forms and JavaScript event listeners.
31. What is the Cordova vibration plugin used for?
Ans: The Cordova vibration plugin is used to vibrate the device, providing haptic feedback to the user.
32. What is the Cordova battery status plugin used for?
Ans: The Cordova battery status plugin provides access to the device’s battery level and charging status.
33. How do you handle push notifications in a Cordova app?
Ans: Push notifications in a Cordova app can be handled using the Cordova Push plugin, which provides access to push notification services such as Firebase Cloud Messaging and Apple Push Notification service.
34. What is the purpose of the Cordova geolocation plugin?
Ans: The Cordova geolocation plugin provides access to the device’s GPS sensor, allowing the app to determine the user’s location.
35. How do you handle device orientation changes in a Cordova app?
Ans: Device orientation changes in a Cordova app can be handled using the Cordova Device Orientation plugin.
36. How do you use the Cordova camera plugin?
Ans: The Cordova camera plugin provides access to the device’s camera, allowing the app to take photos and record videos.
37. How do Cordova and PhoneGap differ in terms of licensing?
| Cordova | PhoneGap |
| Cordova is licensed under the Apache 2.0 license, which is a permissive open-source license that allows developers to use, modify, and distribute Cordova without restrictions. PhoneGap is a commercial distribution of Cordova that includes additional tools, plugins, and support from Adobe, and is subject to Adobe’s licensing terms. | PhoneGap is a commercial distribution of Cordova that includes additional tools, plugins, and support from Adobe, and is subject to Adobe’s licensing terms. Cordova is licensed under the Apache 2.0 license, which is a permissive open-source license that allows developers to use, modify, and distribute Cordova without restrictions. |
38. What is the Cordova network information plugin used for?
Ans: The Cordova network information plugin provides access to the device’s network status, allowing the app to determine if the device is connected to the internet and what type of connection is available.
39. How do you use the Cordova InAppBrowser plugin?
Ans: The Cordova InAppBrowser plugin is used to open external web pages within the app.
40. How do you use the Cordova device motion plugin?
Ans: The Cordova device motion plugin provides access to the device’s gyroscope, allowing the app to detect changes in rotation.
41. What is the Cordova camera plugin used for?
Ans: The Cordova camera plugin provides access to the device’s camera, allowing the app to take photos and videos.
42. How do you use the Cordova dialog plugin to display alerts?
Ans: The Cordova dialog plugin is used to display alerts, confirmations, and prompts to the user.
43. What is the Cordova file plugin used for?
Ans: The Cordova file plugin provides access to the device’s file system, allowing the app to read and write files.
44. How do you use the Cordova email composer plugin?
Ans: The Cordova email composer plugin is used to compose and send emails from within the app.
45. How do you use the Cordova media capture plugin?
Ans: The Cordova media capture plugin is used to capture audio, video, and images using the device’s camera and microphone.
46. What is the Cordova splash screen plugin used for?
Ans: The Cordova splash screen plugin is used to display a custom splash screen while the app is loading.
47. How do you use the Cordova device orientation plugin to get device orientation information?
Ans: The Cordova device orientation plugin provides access to device orientation information such as pitch, roll, and yaw. This information can be accessed using the deviceorientation event.
48. How do you use the Cordova file transfer plugin to upload and download files?
Ans: The Cordova file transfer plugin is used to upload and download files from remote servers using HTTP or FTP.
49. How do you use the Cordova device plugin to get device information?
Ans: The Cordova device plugin provides access to device information such as the model, platform, and version. This information can be accessed using the device.platform and device.version properties.
50. How do you use the Cordova toast plugin to display messages to the user?
Ans: The Cordova toast plugin is used to display short messages to the user that disappear after a few seconds.
51. How do you use the Cordova status bar plugin to customize the status bar?
Ans: The Cordova status bar plugin is used to customize the appearance of the status bar, including the background color and text color.
52. What is the Cordova SMS plugin used for?
Ans: The Cordova SMS plugin is used to send and receive SMS messages from within the app.
53. How do you use the Cordova background mode plugin to keep the app running in the background?
Ans: The Cordova background mode plugin is used to keep the app running in the background, allowing it to continue performing tasks even when the app is not in the foreground. This is useful for tasks such as playing music or monitoring GPS location.
54. What is Cordova and how does it differ from PhoneGap?
Ans:
- Cordova and PhoneGap are both open-source mobile development frameworks based on Apache Cordova.
- Cordova is the underlying technology that provides the ability to build hybrid mobile apps using web technologies.
- PhoneGap is a distribution of Cordova that includes additional tools and services for mobile app development.
55. What are the advantages of using Cordova for mobile app development?
Ans:
- Cross-platform development: Cordova allows developers to build apps for multiple platforms using a single codebase.
- Web technologies: Cordova apps are built using web technologies such as HTML, CSS, and JavaScript, making it easy for web developers to transition to mobile development.
- Access to native device features: Cordova provides plugins that give developers access to native device features such as the camera, GPS, and contacts.
- Open-source: Cordova is an open-source project with a large community of developers contributing to its development and maintenance.
56. What are Cordova plugins and how do you install them?
Cordova plugins are packages of code that provide access to native device features.
Plugins can be installed using the Cordova command-line interface using the command cordova plugin add <plugin-name>.
57. What are some popular Cordova plugins?
Ans:
- Cordova Camera plugin: Provides access to the device’s camera.
- Cordova Geolocation plugin: Provides access to the device’s GPS sensor.
- Cordova Device plugin: Provides access to device information such as the device model and operating system.
- Cordova File plugin: Provides access to the device’s file system.
- Cordova Network Information plugin: Provides information about the device’s network connection.
58. How do you build a Cordova app using the CLI?
Ans:
- Navigate to the project directory in a command prompt or terminal window.
- Run the command cordova build <platform-name> to build the app for the desired platform.
- The output will be generated in the platforms directory.
59. What is the syntax for creating a new Cordova project using the CLI?
Ans:
| cordova create <directory-name> <app-id> <app-name> |
60. How do you run a Cordova app on a device or emulator using the CLI?
Ans:
- Navigate to the project directory in a command prompt or terminal window.
- Run the command cordova run <platform-name> to run the app on the desired platform.
- If a device is connected, the app will be installed and launched on the device. If an emulator is used, the emulator will be launched and the app will be deployed to it.
61. What is the config.xml file in a Cordova project and what is its purpose?
Ans:
- The config.xml file is an XML file that contains configuration information for a Cordova project.
- It includes information such as the app’s name, version number, icon and splash screen images, and plugin dependencies.
- The file is used by the Cordova CLI to generate the project’s platform-specific configuration files.
62. What is the difference between Cordova and PhoneGap?
| Cordova | PhoneGap |
| Cordova is an open-source framework that allows developers to build cross-platform mobile applications using HTML, CSS, and JavaScript. PhoneGap is a distribution of Cordova that includes additional tools, plugins, and support from Adobe. | PhoneGap is a commercial distribution of Cordova that includes additional tools, plugins, and support from Adobe. |
63. How do you add plugins to a Cordova project using the CLI?
Ans:
- Navigate to the project directory in a command prompt or terminal window.
- Run the command cordova plugin add <plugin-name> to add the desired plugin to the project.
- Cordova plugins can be found on the Cordova plugin registry or on other online sources.
64. What is the difference between a Cordova plugin and a Cordova platform?
Ans:
- A Cordova plugin is a package of code that provides access to native device features.
- A Cordova platform is a target platform on which the Cordova app will run, such as Android, iOS, or Windows.
- Cordova plugins can be installed and uninstalled independently of the platforms, while platforms are added or removed from the project as a whole.
65. What is the syntax for removing a platform from a Cordova project using the CLI?
Ans:
| cordova platform remove <platform-name> |
66. What is the Cordova whitelist plugin and why is it important?
Ans:
- The Cordova whitelist plugin is used to control which external resources a Cordova app is allowed to access.
- By default, a Cordova app can access any external resource, but the whitelist plugin allows the developer to specify which resources are allowed.
- This is important for security reasons and to prevent malicious code from accessing sensitive data.
67. Which platforms does Cordova support?
Ans: Cordova supports multiple platforms including iOS, Android, Windows, and Blackberry.
68. What is the difference between Cordova and Ionic?
Ans: Cordova is a mobile development framework that provides access to native device features, while Ionic is a UI framework that provides a set of pre-built UI components.
69. What is the Cordova splash screen and how do you customize it?
Ans:
- The Cordova splash screen is the image that is displayed when the app is launched.
The splash screen can be customized by replacing the default images in the project’s www/res/screen directory. - The images should be in the correct size and aspect ratio for each platform.
70. What is the Cordova icon and how do you customize it?
Ans:
- The Cordova icon is the image that is displayed on the device’s home screen and in the app store.
- The icon can be customized by replacing the default images in the project’s www/res/icon directory.
- The images should be in the correct size and aspect ratio for each platform.
71. How do you use the Cordova InAppBrowser plugin to display external web pages?
Ans:
- Install the Cordova InAppBrowser plugin using the command cordova plugin add cordova-plugin-inappbrowser.
- Use the JavaScript function window.open(<url>, <target>, <options>) to open.
Syntax:
72. What is the syntax for adding a platform to a Cordova project using the CLI?
Ans:
| cordova platform add <platform-name> |
73. What is the difference between a Cordova hybrid app and a native app?
Ans:
- A Cordova hybrid app is built using web technologies such as HTML, CSS, and JavaScript and is wrapped in a native shell that provides access to native device features.
- A native app is built using platform-specific languages such as Swift for iOS or Java for Android.
- Hybrid apps can be built for multiple platforms using a single codebase, while native apps require separate development efforts for each platform.
74. How do you build a Cordova app for Android?
Ans: To build a Cordova app for Android, you need to have the Android SDK installed on your machine and use the Cordova CLI command “cordova build android”.
75. What is the purpose of the Cordova InAppBrowser plugin?
Ans: The Cordova InAppBrowser plugin is used to display web pages within the app, providing a seamless browsing experience.
76. What is the syntax for building a Cordova project for a specific platform using the CLI?
Ans:
| cordova build <platform-name> |
77. How do you install Cordova on your development machine?
Ans:
- Cordova can be installed using the Node Package Manager (NPM) command-line interface.
- Install Node.js and NPM on your development machine.
- Install Cordova globally using the command npm install -g cordova.
78. What is the syntax for running a Cordova project on a device or emulator using the CLI?
Ans:
| cordova run <platform-name> |
79. How do you create a new Cordova project?
Ans: To create a new Cordova project, you can use the Cordova CLI command “cordova create project-name”.
80. What is the syntax for adding a plugin to a Cordova project using the CLI?
Ans:
| cordova plugin add <plugin-name> |
81. How do you debug a Cordova app?
Ans: Cordova apps can be debugged using tools such as Chrome Developer Tools or Safari Web Inspector.
82. What is the purpose of the Cordova CLI?
Ans: The Cordova CLI is a command-line interface tool that is used to create, build, and run Cordova apps.
83. What is the syntax for removing a plugin from a Cordova project using the CLI?
Ans:
| cordova plugin remove <plugin-name> |
84. What is the Cordova CLI?
Ans:
- The Cordova CLI is a command-line interface that allows developers to create, build, and deploy Cordova apps.
- It is used to create new projects, add platforms, install plugins, and build and run the app on devices or emulators.
85. How do you create a new Cordova project using the CLI?
Ans:
- Open a command prompt or terminal window and navigate to the directory where you want to create the project.
- Run the command cordova create <project-name> <package-name>.
The project files will be created in a new directory with the specified name.
86. How do you add platforms to a Cordova project using the CLI?
Ans:
- Navigate to the project directory in a command prompt or terminal window.
Run the command cordova platform add <platform-name> to add the desired platform to the project. - Cordova supports a variety of platforms including Android, iOS, Windows, and browser-based platforms such as Electron and PWA.
87. What is the syntax for checking the installed Cordova version using the CLI?
Ans:
| cordova -v |
88. How do you remove a plugin from a Cordova project using the CLI?
Ans:
- Navigate to the project directory in a command prompt or terminal window.
- Run the command cordova plugin remove <plugin-name> to remove the desired plugin from the project
89. How do you debug a Cordova app on a device or emulator?
Ans:
- Use the Chrome DevTools to debug a Cordova app running on a device or emulator.
- Launch the app on the device or emulator and connect it to the development machine.
- Open Chrome and navigate to the URL chrome://inspect to view the connected devices and inspect the app’s code.
90. What is the syntax for updating Cordova to the latest version using the CLI?
Ans:
| npm install -g cordova |
91. How do you remove a plugin from a Cordova project?
Ans: To remove a plugin from a Cordova project, you can use the Cordova CLI command “cordova plugin rm plugin-name”.
92. What is the Cordova accelerometer plugin used for?
Ans: The Cordova accelerometer plugin provides access to the device’s accelerometer, allowing the app to detect motion and orientation.
93. What is the purpose of the Cordova contacts plugin?
Ans: The Cordova contacts plugin provides access to the device’s contact list, allowing the app to read and write contact information.
94. What is the syntax for creating a Cordova plugin using the CLI?
Ans:
| cordova plugin create <plugin-name> <plugin-id> |
95. How do Cordova and PhoneGap differ in terms of development tools?
| Cordova | PhoneGap |
| Cordova can be used with any development tools, including popular editors like Visual Studio Code and Sublime Text. PhoneGap includes Adobe’s proprietary development tools, such as PhoneGap Build, which allows developers to build and test their applications in the cloud. | PhoneGap is more tightly integrated with Adobe’s development tools, including PhoneGap Build, which allows developers to build and test their applications in the cloud. Cordova can be used with any development tools. |
96. Which API method returns the value associated with the key?
Ans: localStorage.getItem()
97. What are the events used in Cordova projects?
Ans: There are various events that are used in Cordova projects. They are:
- The Pause event is triggered when the application is sent to the background.
- The Resume event is triggered when the application is brought back from the background.
- The Backbutton event is triggered when the back button is pressed.
- The Menu button event is triggered when the menu button is pressed.
- The Search button event is triggered when the search button on Android is pressed.
- The Startcall button event is triggered when the start call button is pressed.
- The Endcall button event is triggered when the end call button is pressed.
- The Volumedown button event is triggered when the volume down button is pressed.
- The Volumeup button event is triggered when the volume up button is pressed.
98. What is Cordova media?
Ans: The Cordova media feature facilitates audio recording and playback in Cordova applications, and can be implemented by installing the Cordova media plugin.
99. What is Cordova Plugman?
Ans: Cordova Plugman is a command-line utility designed for the installation and administration of plugins, typically used when running an application on a specific platform. However, for managing plugins in cross-platform applications, the preferred tool is Cordova-cli.
100. How could you display the battery status of mobile device in Cordova?
Ans: To obtain mobile device battery information in real-time, it is necessary to incorporate the battery plugin, which continuously monitors any changes that occur to the device’s battery.
The Top 100 Cordova Interview Questions and Answers guide provides a comprehensive resource for both beginners and experienced professionals to prepare for their Cordova technical interviews. To stay updated with the latest information and expand your knowledge, do follow us at freshersnow.com.