Android Developer Interview Questions
Be prepared with technical questions as we provide sample questions for junior-, mid-, and senior-level developers to help assess their knowledge and skills.
Be prepared with technical questions as we provide sample questions for junior-, mid-, and senior-level developers to help assess their knowledge and skills.
To find the best Android app developer, you must ask interview questions that reveal applicants' skills, personalities, and experiences. Unfortunately, creating these questions can be time-consuming, especially if you're unfamiliar with Android development and don't know what to look for in a mobile app developer.
This guide explains what an Android developer is responsible for and provides sample interview questions to ask a potential hire. It also covers how Revelo can help you source Android talent, line up interviews, and guide you through the interview process.
An Android app developer uses programming languages and commands to create applications for Android devices. They are also responsible for the following:
Depending on their skill sets and experiences, Android developers can create various apps, including mobile games and productivity apps. They should also know how to create three basic types of Android apps:
As an employer, you may want to consider hiring Android developers to create visually appealing and intuitive apps for companies. Their deep understanding of coding, the Android platform, user experience, and user interface design can ensure your apps meet stakeholder and client requirements, are delivered on time, and are continuously improved and updated.
Entry-level or junior Android developers have zero to four years of experience. Due to their limited experience, entry-level Android developers must usually be mentored by mid-level and senior Android developers. They also typically have fewer responsibilities than their mid-level and senior counterparts.
To gauge their growth potential, you should evaluate entry-level developer candidates' fundamental skills and knowledge. Here are some sample junior Android developer interview questions to get you started.
This question reveals candidates' Android knowledge of fundamental Android concepts. The ideal answer should cover at least three of these components:
Ask this question to learn about entry-level applicants' basic knowledge and skills. Good responses should cover at least two of the following:
Mid-level Android developers have four to six years of experience. They have more responsibilities than entry-level developers but take fewer leadership and mentorship roles than their senior counterparts.
When hiring mid-level Android developers, you should ask interview questions that assess their proficient understanding of advanced concepts. You should also assess soft skills like problem-solving and the ability to handle complex development tasks.
Below are sample interview questions for mid-level Android developers.
This question tests candidates' knowledge of advanced Android concepts. A strong answer should look something like this:
Explicit intent specifies the component, and intent provides the external class that will be invoked. In contrast, implicit intent does not specify the component. Instead, intent provides data on the available components that will be invoked.
Ask this question to learn more about an applicant's optimization skills. Here's what an ideal answer should cover:
The Dalvik Virtual Machine (DVM) was an Android virtual machine optimized for mobile devices. It optimized the virtual machine for battery life, memory, and performance. It was a vital part of the Android software stack in Android versions 4.4 and earlier versions, often used on mobile devices such as tablet computers and mobile phones. Android Runtime replaced the DVM in 2014.
This question reveals the depth of job seekers' technical knowledge. The best answers should resemble the following:
Containers can sort a collection of widgets, objects, and other elements. They can hold anything, including fields, child containers, and buttons. Developers can use containers to isolate mobile apps from the mobile operating system and other applications on the same device. Containerization offers many benefits, including improved content and data security, complete control over the workplace, a native Android experience, and user data privacy. Developers can also use containerization to make two versions of any app: one for work and another for personal use.
Senior Android developers have over six years of experience. They lead and mentor junior- and mid-level developers, collaborate with other developers to continuously improve products, develop high-quality code by reviewing other developers' work, and champion a client-focused environment.
To assess senior-level Android developers' suitability, ask questions that assess their in-depth knowledge, leadership skills, extensive portfolio, and ability to tackle complex challenges in Android app development. Feel free to reference these sample Android interview questions for senior developer questions.
This question evaluates the breadth of senior-level Android developers' development knowledge. Here's a model answer:
An activity is the most basic form of an Android application. It represents a single screen with a user interface. Developers can use activities to launch and create other app components, such as passing data between screens and launching a new screen. In contrast, fragments are small bits of code for building user interfaces within activities. Developers usually use fragments to separate complex user interfaces into smaller, more manageable pieces. They can also use fragments to provide a shared user interface between multiple activities or add functionalities to an existing activity.
This question tests applicants' ability to code effectively and efficiently. A strong answer should resemble the following:
Serializable code is a standard Java interface for adding override methods. The main problem with a serializable framework is that it uses reflection and is slow. This is because a serializable approach creates a lot of temporary objects and garbage collection. In contrast, the parcelable method is much faster because developers are explicit about the serialization process rather than using reflection to infer it.
Ask this question to evaluate job seekers' troubleshooting skills and experience. A good answer should look like this:
I would troubleshoot a crashing application by doing the following:
If you don't have the time or resources to interview and hire Android developers, Revelo can help. Our Latin American Android developers operate in U.S. time zones and have been thoroughly vetted for English fluency and hard and soft skills. Revelo can also support hiring and onboarding by managing payroll, compliance, and benefits.
Interested in seeing how we can help you? Contact us to learn more about hiring dedicated Android developers to join your team.
Our remote engineers are in US time zones or adjacent. Not 10+ hours ahead. Enjoy real-time collaboration with your hires.
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