
Manipulação de Arrays e elementos JS
Authored by CLEYTON PINHEIRO
Computers
2nd Grade
Used 2+ times

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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sobre arrays em JavaScript, seleciona/marque somente a alternativa correta?
Arrays podem conter apenas números.
Arrays são objetos em JavaScript.
Arrays têm tamanho fixo.
Arrays não podem ser aninhados.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é o resultado da seguinte expressão em JavaScript: ['a', 'b', 'c'].length?
0
2
3
4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual método de array é usado para criar um novo array com todos os elementos que passam em um teste implementado por uma função fornecida?
map()
filter()
reduce()
forEach()
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual das opções abaixo é verdadeira sobre o método forEach() em JavaScript?
Retorna um novo array.
Modifica o array original.
Executa uma função para cada elemento do array.
Remove elementos do array.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é o resultado da expressão ['a', 'b', 'c'].indexOf('b')?
-1
0
1
2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual método de array é usado para inverter a ordem dos elementos no array?
sort()
reverse()
slice()
splice()
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual método de array é usado para adicionar ou remover elementos de qualquer posição do array?
splice()
slice()
concat()
join()
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