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JavaScript Fundamentals — Unit 1

20 questions 30 minutes 58 attempts 74% average
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Questions · showing 3 of 20

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01 What does the typeof operator return for null?Easy
A"null"
B"object"
C"undefined"
D"number"
02 Which array method returns a new array with transformed elements?Easy
A.forEach()
B.filter()
C.map()
D.reduce()
03 What is logged first?Hard
AsetTimeout callback
BPromise .then
CBoth together
DNeither