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JavaScript Beginner 1 min

JavaScript fundamentals

Variables, arrays, functions and small code-reading details.

questions

3

A short test to warm up. There are conceptual questions and code-reading ones, so take your time before picking an answer.

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01:00:00

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JavaScript Beginner 1 min 3 preguntas

JavaScript fundamentals

Variables, arrays, functions and small code-reading details.

Pregunta 1

What value does this code print?

Snippet js 
const x = 2;
const y = x * 3;
console.log(y);
Opciones para What value does this code print?

Pregunta 2

Which method creates a new array without mutating the original?

Opciones para Which method creates a new array without mutating the original?

Pregunta 3

What does a function without an explicit `return` return?

Opciones para What does a function without an explicit `return` return?

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