Question

question 8
which is an example of a cross - platform mobile framework?
o a. java spring
o b. django
o c. react native
o d. sql server

question 9
which mobile app technology can work offline using service workers?
o a. native apps
o b. pwas
o c. desktop apps
o d. react native

question 10
which of the following helps ensure consistent responsiveness on mobile screens?
o a. raw html
o b. fixed pixel layouts
o c. responsive design
o d. only css animations

question 11
which of the following is a limitation of react native?
o a. no hot reload
o b. requires native knowledge for complex modules

Explanation:

• Question 8: React Native is a cross - platform mobile framework that allows developers to build mobile apps for both iOS and Android using JavaScript. Java Spring is a Java - based framework for enterprise applications, Django is a Python web framework, and SQL Server is a database management system.
• Question 9: Progressive Web Apps (PWAs) can work offline using service workers. Service workers are scripts that run in the background, separate from web pages, and can intercept network requests, cache assets, and enable offline functionality. Native apps have their own offline mechanisms but not typically using service workers in the same web - based context. Desktop apps are not mobile apps, and React Native is a mobile app development framework but not inherently defined by service - worker - based offline functionality.
• Question 10: Responsive design is a set of techniques (such as media queries in CSS) that help ensure that web pages and apps have consistent responsiveness on mobile screens. Raw HTML alone does not ensure responsiveness. Fixed - pixel layouts do not adapt well to different screen sizes, and only CSS animations do not address overall layout responsiveness.
• Question 11: React Native has a limitation in that for complex modules, it may require native knowledge (e.g., knowledge of Java/Kotlin for Android or Swift/Objective - C for iOS). React Native does support hot reload.

Answer:

• Question 8: C. React Native
• Question 9: B. PWAs
• Question 10: C. Responsive design
• Question 11: B. Requires native knowledge for complex modules