Introduction to Kotlin Interview Questions and Answers

Kotlin is best suited for developing server-side applications which allow to write and execute expressive code. It also supports deployment over any host that runs on Java applications. the key frameworks which can be associated with Kotlin for server-side development are as follow.

• Spring
• x
• HTML
• Ktor

Kotlin is also a nice fit for Android application development.holding all the key advantages of a modern language in android systems. the important advantages of kotlin on Android platforms are,

• Compatibility
• Performance
• interoperability
• footprint
• compilation time
• learning curve

Kotlin can be worn jointly with active third-party libraries and frameworks. To access third-party frameworks with a strongly-typed API, convert TypeScript definitions from the Definitely Typed type definitions repository to Kotlin using the ts2kt tool.
There are multiple platforms which support Kotlin/Native programming language

• iOS (arm32, arm64, emulator x86_64) MacOS (x86_64)
• Android (arm32, arm64)
• Windows (MinGW x86_64)
• Linux (x86_64, arm32, MIPS, MIPS little endian)
• web assembly (wasm32)

So if you are looking for a job that is related to Kotlin, you need to prepare for the 2019 Kotlin Interview Questions. Though every Kotlin interview is different and the scope of a job is also different, we can help you out with the top Kotlin Interview Questions and Answers, which will help you to take the leap and get you success in an interviews

Below is the 2019 Kotlin Interview Questions that are mostly asked in an interview. These Top Questions are divided into two parts are as follows:

Part 1 – Kotlin Interview Questions (Basic)

This first part covers basic Kotlin Interview Questions and Answers

Q1. What is kotlin?

Answer:
Kotin is an open source programming language which executes using Java virtual machine as its platform.it was developed by JetBrains.it is comparatively simpler than Java and offers several features which Java does not have a hold on. it is a combination of procedural and object-oriented programming language.

Q2. How Kotlin works?

Answer:
Kotlin runs on Java virtual machine for its execution. All kotlin code is converted in native code and this process of bytecode conversion can also be achieved by using other relative virtual machines.

Let us move to the next Kotlin Interview Questions.

Q3. Key features of kotlin which are not available in java?

Answer:
There are some key features which are not available in java.

• Extension Functions
• Operator Overloading
• Smart casts
• Data classes
• Range expressions
• Null Safety
• Coroutines
• Companion Objects

Q4. Important benefits of kotlin?

Answer:
This is the basic Kotlin Interview Question asked in an interview. Kotlin benefits points are follow

• Syntaxually resembles java and it is also easy to learn a language
• A functional language built-in reference to JVM
• Code readability and understandability is very high

Q5. In the java.io.file list, the extension methods kotlin provides?

Answer:
Some extension method provides:

• bufferedReader(): Reading file to BufferedReader
• readBytes(): Reading file to ByteArray
• readText(): Reading file to single String
• forEachLine(): Use for reading a file line by line in Kotlin
• readLines(): Reading file to List

Part 2 – Kotlin Interview Questions (Advanced)

Let us now have a look at the advanced Kotlin Interview Questions.

Q6. Kotlin const vs val?

Answer:

• Keyword const is used for compile-time initializations
• Keyword val is used for runtime initialization

Q7. Primary constructors vs secondary constructors?

Answer:
Primary Constructors are affirmed essentially in a class definition. Secondary Constructors are affirmed solely inside the class body. In the following example, in the first line, the constructor keyword including the variables declared right after it is the Primary Constructor.the secondary constructor is the one declared inside the body of the class.

class A constructor(var nme: String, var age: Int)

{ var designation: String = “Not Mentioned”class A constructor(var nme: String, var age: Int){

constructor (nme: String, age: Int, designation: String): this(name,age){

this.designation = designation

Let us move to the next Kotlin Interview Questions.

Q8. Is there a possibility to migrate code from Kotlin to Java?

Answer:
Yes, Kotlin to java code migration is definitely possible. An inbuilt tool is provided by jet BRAINS idea to address this migration purpose.

Q9. Does Kotlin support primitive datatypes as like in Java, If yes please explain them in detail?

Answer:
This is the most asked Kotlin Interview Questions in an interview. No kotlin does not support primitive datatypes as like in java.

Q10. List the key modifiers that are associated with Kotlin?

Answer:
There are the list of Key modifiers

1. public
2. private
3. protected
4. interval

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This has been a guide to list Of Kotlin Interview Questions and Answers so that the candidate can crackdown these Kotlin Interview Questions easily. Here in this post, we have studied top Kotlin Interview Questions which are often asked in interviews. You may also look at the following articles to learn more –

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