In Bangladesh, a Samsung Galaxy M01 running Android 10 can be purchased for about $69 as opposed to iOS customers using devices that cost four figures.

That explains why the Google Play Market has such a large number of apps. A large user base provides almost limitless potential for growth. So, investing in an Android application developer is worthwhile.

Examine the education and experience of an Android developer before hiring them.

5 technical queries to ask an Android developer before hiring

The two languages most frequently used for app development, Java and Kotlin, must also be known by top Android developers in addition to the SDK and Android Runtime.

High-level, class-based, object-oriented programming languages like Java and Kotlin are both available. Hire Android app developers, but test them on both before you hire them.

01. The levels of the Android architecture should be described.

On Linux, the kernel is based. That is what gives it its strength.

Libraries

Retrofit

Moshi

EventBus

There are around 15 libraries, and there is a large number of modules in the GitHub repository.

Runtime

The Android mobile operating system switched from using Dalvik to using ART as of Lollipop (version 5.0). The majority of mobile application development no longer updates apps for Dalvik after eight years.

Framework

In this context, the term “Framework” refers to the very specialised Android design, animations, and tools.

Applications

Users can access tools including browsers, chat apps, and mail.

02. What types of memory does the Java Virtual Machine support?

Android makes considerable use of Java. Memory types in Java include:

Class

Heap

Stack

Software counter

Stack of native methods

03. How may two strings be joined together in Kotlin?

making use of the plus() or + operator

VALUE A = “GOOD”

VALUE B = “LUCK”

“GoodLuck” would be stored in val c = a + b.

and “Good Luck” would be stored in a + ” ” + b.

04. How many dialogue boxes can be supported by Android?

Alert

typically employed for yes-or-no choices, such as Rate This App and Rate Now / Later.

Date

for choosing a date

Time

for choosing a time.

05. Describe AAPT.

It is the Android Asset Packaging Tool, which is comparable to a Windows.zip file.

Compressed folders may be created for installation and extraction. usually used to unpack a large installation when, for example, an 80 MB file might only take up 45 MB on the Play Store.