JavaScript Programming Intermediate Quiz 1

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Practice Pronunciation (Merriam-Webster)
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Intermediate Quiz 1
1. What will console.log(typeof NaN) output?
2. Which method would you use to merge two arrays?
3. What does Array.isArray([]) return?
4. What is the result of [1,2,3].map(x => x * 2) ?
5. What will console.log(0 === false) print?
6. Which of these is a valid way to declare an arrow function?
7. What is the output of parseInt("101", 2) ?
8. What does JSON.stringify({a:1}) return?
9. What is the value of typeof null ?
10. How do you clone an array arr in ES6?
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