30 Mobile Developer Interview Questions + Answers

A broadcast receiver is a mechanism used for listening to system-level events like listening for incoming calls, SMS, etc. by the host application. It is implemented as a subclass of BroadcastReceiver class and each message is broadcasted as an intent object. Android provides a collection of view classes that serve as containers for views. These container classes are called layouts, which are defined in the form of XML files that cannot be changed by our code during execution. The layout managers provided by Android SDK are LinearLayout, RelativeLayout, FrameLayout, AbsoluteLayout, GridLayout, and TableLayout.

  • We need Android in the mobile market because it helps smartphone users to download applications that can give different services.
  • I bet you’re not going to have any problem answering this but it will be good that you demonstrate familiarity and knowledge on how to use more than one OS and brand.
  • The first is to provide an answer that aligns with the employer’s preference.
  • If your app will be free for the first little while, then your developer should have an understanding of mobile advertising networks.
  • It also disables screen compatibility mode when running on larger screens .
  • Developers should use such features only when necessary and use optimized OS solutions to update data in the background.
  • For performance of individual pieces of code, you could use XCTest’s measureBlock.

As with any operational question like this, you should anticipate follow-up questions when providing your answer. As an application developer, you can have either very focused experience or broad experience across many different application types. Both of these are beneficial but also determine the type of developer jobs you’re qualified for.

Will you submit my mobile app to the appropriate app stores, and under which name will it be published?

As an Android developer, you will be responsible for ensuring that your company’s Android applications are up to date and compliant with the latest Android operating system releases. In addition, you will also be responsible for developing new features and functionality for your company’s Android applications. As an Android developer, you will need to have a strong understanding of the Android SDK and the Java programming language. It is an open-sourced operating system that is used primarily on mobile devices, such as cell phones and tablets. It is a Linux kernel-based system that’s been equipped with rich components that allows developers to create and run apps that can perform both basic and advanced functions. Learn what skills and qualities interviewers are looking for from a mobile app developer, what questions you can expect, and how you should go about answering them.

  • You should anticipate this question and be prepared to respond to it.
  • Mobile apps are a strong tool to leverage in today’s digital world.
  • This question can help interviewers understand how you approach challenges and solve problems.
  • Further, the Android system will check which components are registered to handle that specific action based on intent data.
  • There are a few reasons why an interviewer would ask this question to a mobile developer.

IBeacon.com defines iBeacon as Apple’s technology standard which allows Mobile Apps to listen for signals from beacons in the physical world and react accordingly. IBeacon technology allows Mobile Apps to understand their position on a micro-local scale, and deliver hyper-contextual content to users based on location.

iOS Interview Questions for Senior Developers in 2020

This gives a more responsive how to become a mobile developer on different screens and orientations. But also once installed, keeping unnecessary files and otherwise taking up too much space may lead to users uninstalling the app and looking for a better alternative.

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Posted: Sun, 05 Feb 2023 08:00:00 GMT [source]

A single Xcode project can have multiple targets and therefore output multiple apps. A common use case is an app that has both lite/free and pro/full versions or is branded multiple ways. Properties specified as atomic always return a fully initialized object.

What is ANR in Android? What are the measures you can take to avoid ANR?

It is a system in xCode that dynamically calculates the size and position of all views based on the constraints placed on those views. NSArray is used when you don’t want to resize or change the data stored in the array. In the NSMutable array, you can add, remove, or change the values ​​in the array. You can pass the closure as an argument to a function, or store it as a property of an object. AnyObject does not specify any type, so it will allow you to pass any type, which could lead to a runtime error .

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