Top 100 Kotlin Courses with Q&A

Learning Kotlin involves diving into a modern, concise, and versatile programming language developed by JetBrains.

The advantage of mastering Kotlin lies in its interoperability with Java, making it an excellent choice for Android app development while also being applicable to various platforms like web and backend development.

Kotlin’s concise syntax reduces boilerplate code, enhancing readability and maintainability, while its null safety features minimize the risk of null pointer exceptions, a common issue in programming. Additionally, Kotlin’s support for functional programming paradigms, coroutines for asynchronous programming, and seamless integration with existing Java codebases accelerates development and fosters efficient and robust application building.

Its versatility, expressiveness, and emphasis on safety make Kotlin a valuable skill for developers seeking modern, efficient, and scalable solutions across diverse software development domains.


Here are top 100 assorted courses for kotlin with Udemy with special discounted pricing.

Courses could not be fetched. Please try again.

Here are 10 multiple-choice questions (MCQs) related to Kotlin, along with their respective answers:

What is Kotlin primarily known for in the realm of programming languages?
a) Its compatibility with C++
b) Its strict typing system
c) Its interoperability with Java
d) Its extensive library support
Answer: c) Its interoperability with Java

Which keyword is used in Kotlin to declare a variable that cannot be reassigned?
a) var
b) const
c) val
d) final
Answer: c) val

What is the purpose of the “fun” keyword in Kotlin?
a) Declaring a class
b) Creating a function
c) Defining a variable
d) Initializing an object
Answer: b) Creating a function

Which Kotlin feature helps prevent null pointer exceptions at compile time?
a) Optional chaining
b) Nullability annotations
c) Safe casts
d) Elvis operator
Answer: b) Nullability annotations

What does the “lateinit” keyword indicate in Kotlin?
a) A variable that can be reassigned later
b) A variable that must be initialized immediately
c) A variable that can be initialized lazily
d) A variable that cannot be accessed outside its class
Answer: c) A variable that can be initialized lazily

Which Kotlin feature helps in handling null values by providing an alternative value?
a) Elvis operator (?:)
b) Safe call operator (?.)
c) Not-null assertion (!!)
d) Safe cast operator (as?)
Answer: a) Elvis operator (?:)

What does the “when” keyword represent in Kotlin?
a) A loop for iterating over collections
b) A switch-case statement alternative
c) A conditional expression for booleans
d) A keyword for asynchronous operations
Answer: b) A switch-case statement alternative

Which scope function in Kotlin allows access to the object using “it” keyword?
a) apply
b) let
c) run
d) with
Answer: b) let

Which collection type in Kotlin does not allow duplicate elements?
a) Set
b) List
c) Map
d) Array
Answer: a) Set

What is the primary advantage of using Kotlin over Java for Android app development?
a) Greater performance
b) Simpler syntax
c) Improved memory management
d) Enhanced null safety features
Answer: d) Enhanced null safety features