
3TDS - Programação Mobile - Aula 07
Authored by JOAO MONTEIRO
Information Technology (IT)
12th Grade
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é o tipo de variável que pode ser redeclarada e tem escopo de função em JavaScript?
let
const
var
string
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é o escopo de uma variável declarada com a palavra-chave `let`?
Escopo global
Escopo de bloco
Escopo de função
Escopo de objeto
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
O que acontece se você tentar reatribuir um valor a uma variável declarada com `const`?
O valor é alterado sem problemas
Um erro é gerado
A variável é convertida para `let`
A variável é convertida para `var`
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual das seguintes opções é uma declaração válida de variável usando `let`?
let 123nome = "João";
let nome = "Maria";
let const = "valor";
let var = 10;
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Considere o seguinte código: ```javascript var x = 10; if (true) { let x = 20; console.log(x); } console.log(x); ``` Qual será a saída no console?
10, 10
20, 20
20, 10
10, 20
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