Kotlin First Week Flashcard

Front

Which company officially announced Kotlin support for Android development in 2017?

Back

Google

Front

What kind of programming language is Kotlin?

Back

Compiled

Front

What will be the output of the following code? Options: 11, 10, error, null

Back

10

Front

Does Kotlin have primitive data types, such as int, long, float?

Back

No, not at language level. But the Kotlin compiler makes use of JVM primitives for best performance

Front

Kotlin uses 1 and 0 to represent Boolean values.

Back

False

Front

What result does this code produce? Options: 1, 2, error, 0

Back

error

Front

Does this image represent anything in Kotlin?

Back

Yes, it refers to Elvis operator

Front

What result does this code produce? Options: [1, 2, 3], null, numbers, [1, 2, 3, 4]

Back

[1, 2, 3, 4]

Front

What does the !! operator do?

Back

It converts any value to a non-null type and throws an exception if the value is in fact null.

Front

Why do developers prefer dark mode?

Back

It looks more hacker-ish.