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Erros em JavaScript

Authored by Ryan Castro

Instructional Technology

12th Grade

Used 3+ times

Erros em JavaScript
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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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