In the year 2008 Android came as a popular computing platform, which is based on the Linux operating system. In the smartphone market, it became one of the most leading names that managed to change the whole. In the last ten years time, it grabs the majority of market share sharing with iOS and has effectively become the world most popular operating system. With the maturity of Android, it is finding its new way into a variety of devices, not just on smartphones but also includes televisions, projectors, automobiles and even now the vehicles.
Today with the advent of the Android platform, the Android developers are huge in demand and every sector and industry is looking to recruit them in-house. If you aspire to be an Android developer, then this is just the place for you. Given below is the list of questions, which answers both basic and advanced concepts of Android. These questions if well prepared before an interview shall give an extra edge to the candidate and give confidence of facing the panel:
Default resources contain the default string and files. If this resource is not present the error will keep occurring, and the app will not be able to run. Resources are placed in subdirectories under the project res/ directory. Moreover, therefore helps the app to function in the desired conditions.
Android application components are the building block essentially used in the Android application. The application manifest file named Android manifest.xml couples the components. This describes each component of the application and describes how they interact, and then the processing activity takes place.
There are four main components, which are:
Android is an open-sourced operating system by Linux that is primarily used in mobile devices like cell phones and tablets. This Linux kernel based system is equipped with high and advanced components that allow developers to create and run apps. Therefore performs the basic as well as the advanced functions.
A fragment means behavior or the portion of user interface in a Fragment Activity. One can combine multiple fragments in a single activity to build a UI and can reuse the fragment in multiple activities. The fragment can be considered as a modular section of an activity. This has its life cycle, gets its input events, which can be added or removed accordingly. It is must host a fragment in an activity and fragments lifecycle is directly related by the host activity’s lifecycle.
The architecture of Android application has few components, which have their functions to perform:
In the latest update of Android version 6.0, the official Android code name is known as a marshmallow. It was launched in May 2015. This was the successor of the Android version 5.0 named as Lollipop. Google named this version as a marshmallow on 17th August 2015 for Nexus devices.
It is an instruction for Android OS that specifies how the activity should be launched or performed. The activities are performed into two areas, which are:
Services here is an application component that can perform long-duration operations in the background. It doesn’t provide a user interface. Other application components can start a service and can continue to perform/ run in the background when the users switch to some other application. There are three different types of services:
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