JavaScript Programming Intermediate Quiz 3
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Intermediate Quiz 3
1. How do you create a new object that inherits from another object?
Object.clone()
Object.inherit()
Object.create()
2. What is the output of
console.log([1,2,3].length)
?
3
2
undefined
3. Which method returns the index of the first occurrence of a value in an array?
findIndex()
indexOf()
search()
4. What is the output of
!!0
?
0
true
false
5. Which method returns a shallow copy of a portion of an array?
slice()
splice()
copy()
6. What is the output of
typeof []
?
"array"
"object"
"undefined"
7. Which method would you use to combine all elements of an array into a string?
concat()
joinAll()
join()
8. What is the output of
typeof null
?
"object"
"null"
"undefined"
9. What is the output of
console.log('2' + 2)
?
4
"22"
NaN
10. Which method can be used to convert a string to an integer?
parseStr()
toInt()
parseInt()
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