Kotlin was introduced in 2011 by JetBrains, who were using Java earlier. There were two reasons for creating Kotlin, first and foremost is the productivity. While the second one is the technology that demands evolution each day, which results in coding for the developers also needing some abstraction. The Kotlin Programming Language is an abstraction of Java with the core principles like Readability, conciseness, safety and ability to tool the language. The goal behind the development of Kotlin was to create an industry language that is used to develop a desktop, web server or mobile application so that Kotlin can be used in any application. Kotlin focuses on efficiency and dealing with the clutter of software development; adding up on that is now it is officially adopted as a supported language by Android. This has left the companies to look for a candidate with the knowledge of Kotlin. So, below are a few Kotlin Interview questions that will provide you with the overall structure of Kotlin, its components, and other basics. These questions might help you crack the interview with ease and get your hands on the job.
Note: There can be more secondary constructors for a class.
Public: It is by default, which means that the declarations will be visible everywhere.
Internal: This makes the declaration visible everywhere in the same modules.
Protected: This keeps the declaration protected and is not available for top-level declarations.
In Kotlin String, templates can be evaluated.This evaluation of string templates is called as the string template interpolation.
Kotlin is simple and easy to learn as its syntax is similar to that of Java.
It is the functional language that is based on JVM (Java Virtual Machine), which removes the boilerplate codes. Upon all this, Kotlin is considered as an expressive language that is easily readable and understandable and the performance is substantially good.
It can be used by any desktop, web server or mobile based applications.
Kotlin does not provide the static modifier, which causes problems for conventional java developer.
In Kotlin, the function declaration can be done in many places in the application, which creates the trouble for the developer to understand which function is being called.
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