It is no secret that Android is loved by millions of people around the world. Created and developed by Google, it would be most developers’ dream job. That being said, there are a lot of job opportunities that do require you to be proficient with Android development. These are typically high-end jobs that offer awesome salaries and great work benefits.
However, before you can start reaping the benefits of such a job, you need to get it first. To do so, you will have to pass a job interview which will involve Android interview questions.
The Fundamentals of Android Development
Let’s try to not get ahead of ourselves and just take it from the top. And in this case, the top means “the basic questions”.
Even though these questions are labeled as “basic”, you shouldn’t just discard them as common knowledge. Even if you’re an experienced Android developer, you might still find some things that are simply too difficult to explain. Thus, you have to search for an easier answer. And these basic questions provide just that – a chance to learn how to deal with difficult stuff quickly! This is very important to your employers, so don’t just brush these “basic” Android interview questions and answers off.
Question 1: What is Android?
Most of the Android job interviews that you’ll attend are bound to have this as their very first question. In answering, you not only demonstrate that you know what Android is (and you’re not just a random person off the street), but also show your ability to form your definitions.
Quite simply, Android is a mobile operating service. As I’ve mentioned in the beginning, it was created and developed by the team at Google. Its code is based on the open-source Linux kernel, and it (Android) was designed to primarily be used on touchscreen devices, thus eventually becoming the biggest rival to iOS.
Question 2: What is ‘application’?
The Application class can be considered as the baseline of Android – it is the key class that contains all of the other important elements for other actions and services that Android performs. Probably needless to say, but this class is initialized before anything else in Android once the program is launched.
Question 3: What is the place where the GUI of Android is stored called?
First of all, in Android interview questions, let’s establish what a ‘GUI’ is.
GUI means Graphical User Interface. It is a tool that helps the developers to simulate certain specific scenarios and see them in the way that a user of the app would see it.
Android’s GUI is stored within what is called an “Android SDK”. For an easy comparison of what that is, imagine that you were planning to go and work in the garden. What would you need to do that? That’s right – tools. Where are the tools usually stored? That’s right – the shed. The Android SDK is the equivalent of a shed – it stores all of the essential and necessary tools for the developer’s easy access.
It’s quite an extended answer, but remember – the more Android interview questions that you expand on, the more knowledgeable you will look in front of your potential employer.
Question 4: Define ‘implicit’ and ‘explicit’ intents.
In addition to definitions, you might also encounter a lot of comparison-based Android developer interview questions during your job interview. When it comes to the basic part, these would usually require you to compare some very fundamental Android variables. The same applies in this case.
When you imply an implicit intent, the Android interface checks the system for settings that might help you perform your task. The explicit intent, on the other hand, is when you specify the components that your system should use while performing the task. To oversimplify, you just order the system to do as you say and leave little room for agility.
Question 5: Name the four Java sensor classes.
Android uses four specific Java classes that are based on sensors. These are as follows: Sensor, SensorEvent, SensorEventListener, and SensorManager.
Question 6: Can you run Java on Android using the standard bytecode?
No, no you can’t. If this is one of the Android interview questions that your employers will ask a follow-up question (in this case it would most likely be “why?”), you can just say that Android is based on and uses a different, specific type of bytecode.
Question 7: Name a few pros of the Android system.
Opinion based questions are pretty cool because you are completely free to tell your opinion on the matter, but (at least in this case) can be sure that it’s completely subjective.
Why do employers even ask such questions, then? Well, that’s pretty easy – to see what you value and prioritize the most when it comes to Android. It’s a nice “trick question” for the employers to check if you’re going to go on a rant that you memorized on the internet, or if you’re thinking about it.
Since it’s quite subjective, there is no one true or false answer in this kind of Android interview questions. However, just to give you a few examples of what a lot of other people proclaim to be the best features: Android being open-source, being supported by a wide variety of hardware developers, being based on Java, and so on.
Question 8: What does ‘ContentProvider’ do?
This command is used to access specific types of organized and structured sets of data. You can view it as a sort of a medium – it connects strings of code with other, different strings of code.
Question 9: What is the bytecode that Android uses?
If you remember one of the previous (namely, Question 6) Android interview questions and answers in this tutorial, you probably know that Android cannot use the Java bytecode because it has one of its own. This bytecode is called Dalvik Virtual Machine (DVS).
Question 10: What is the use of an Adapter?
In the Android system, adapters are used to connect the AdapterView (whatever that might be; it depends on the specific scenario in which it is used) with an external source of data.
Now that you know all of these common questions and answers, try to answer these questions yourself and if you forgot something, just click it to scroll back to the answer.