Erros em JavaScript
Authored by Ryan Castro
Instructional Technology
12th Grade
Used 3+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é o resultado de `console.log(2 + '2')` em JavaScript?
4
'22'
NaN
undefined
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
O que `typeof NaN` retorna em JavaScript?
'number'
'NaN'
'undefined'
'object'
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é o valor de `null == undefined` em JavaScript?
true
false
TypeError
NaN
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é o resultado de `0.1 + 0.2 === 0.3` em JavaScript?
true
false
NaN
undefined
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
O que `[] + []` retorna em JavaScript?
'[]'
''
[]
NaN
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é o valor de `typeof null` em JavaScript?
'null'
'undefined'
'object'
'number'
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
O que `isNaN('NaN')` retorna em JavaScript?
true
false
'NaN'
undefined
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