Blog

Question 1:  What does a JavaScript Set object store?

(A) Only strings

(B) Only numbers

(C) Unique values of any type

Question 2:  Which method is used to add a value to a Set?

(A) insert()

(B) add()

(C) push()

Question 3:  What does the Map object store?

(A) Key-value pairs

(B) Only keys

(C) Only values

Question 4:  What is the result of adding the same value twice in a Set?

(A) Error occurs

(B) Value is added twice

(C) Value is added only once

Question 5:  How do you check the size of a Set?

(A) length

(B) count

(C) size

Question 6:  What is the default iteration order in Map?

(A) Alphabetical

(B) Random

(C) Insertion order

Question 7:  Which method removes all elements from a Set?

(A) delete()

(B) clear()

(C) removeAll()

Question 8:  How do you delete a specific key from a Map?

(A) remove(key)

(B) delete(key)

(C) clear(key)

Question 9:  What is returned by Map.get(key) if the key is not found?

(A) null

(B) undefined

(C) false

Question 10:  Can objects be used as keys in a Map?

(A) No

(B) Yes

(C) Only strings allowed