Android developer - Interview questions

HariKrshnan — Thu, 16 Dec 2021 13:43:35 +0000

Hello, recently I made a job switch and have attended interviews in various companies. I would like to share the list of questions and topics I came across during the process.

Programming Basics

what is the difference between final, finally and finalize?Answer
Explain abstraction in OOPS concept
Explain inheritance in OOPS concept
How to achieve polymorphism and it's types?
What is Interface in Java?
Can we create Object for abstract class? No, we can't create. Explanation
Can we pass null value into HashMap?Answer
Different types of Exceptions.
Difference between array and arrayList. Answer
Difference between serializable and parcelable. Answer

Android questions

How to add multiple fragments in single activity? Answer
Difference types of services in android?
How to create a custom view and custom widget in android? Custom View, Custom widget
How to update a single item in recyclerView? Answer
Scope functions in Kotlin. Docs
Different types of Launch modes in android. Answer
How to check whether the lateinit variable is initialized? Answer
What is Elvis operator in kotlin? Answer
What is MultiDex in android? Explanation
Explain LiveData and it's types in android. Explanation
Difference between App bundle and APK. Answer
What is key store file in android? Explanation
Why we need to sign our app before releasing to PlayStore? Explanation
What is the use of Gradle in android? Answer
Explain build flavors in android. Answer
How to implement Dynamic module delivery? Docs
Coroutines in android. Docs
Broadcast receivers in android. Docs
Content providers in android. Docs
What is Intent and it's types? Blog
Activity and fragment lifecycle. Check this lifecycle cheat sheet
What is Job scheduler in android? Answer
Explain Alarm manager. Answer.
How does MVVM works. Answer
What is companion object in kotlin? Answer
Difference between val and const in kotlin. Answer
How room works internally? Answer
Explain Hilt in android. Answer

Additional resources
Kotlin cheat sheet 1
Kotlin cheat sheet and quick reference
Android cheat sheet

Please do share any interview topics and questions you came across in comments.
Hope this helps :-).

VS Code plugins to increase coding speed

HariKrshnan — Tue, 17 Aug 2021 05:08:21 +0000

Hey world, here is the list of plugins that I found helpful for react native developers to increase coding speed.

AutoRename Tag
Since VS code will not rename the paired tag automatically, this plugin will help you solve that issue.
Intellij IDEA keymap
If you are an android developer who recently migrated to react, learning new VS code shortcuts will be a tiresome job. And this plugin will be a life saver. It will allow you to use Intellij idea shortcuts in VS code without any further change.
Git Lens
Git lens plugin will enhance your VS code git capabilities with features like viewing authorship, code comparison and blaming, navigation between repositories, etc.
Settings sync
Next in the list, we have the settings sync to sync all our customizations, keyboard shortcuts, extensions, and other settings so that you don't need to waste your time on setting up your IDE next time. You can use your GitHub account token and gist to upload your file.
Bookmarks
Since VS code doesn't have an option to bookmark, this plugin will help you create bookmarks and navigate between them easily.

Thanks for your minute :-), Happy coding!

DEV Community: HariKrshnan

Android developer - Interview questions

VS Code plugins to increase coding speed