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Question 38

Starting from an empty array, values are assigned only at indexes 0 and 4, and no other length-changing operation occurs. What is its length?

  1. 2
  2. 5Correct answer
  3. 4
  4. undefined

Explanation

The highest present index is 4, so length becomes one greater, which is 5. Counting only the two present elements ignores the holes and confuses array length with the number of populated positions.

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Question 38: Starting from an empty array, values are assigned only at… · JavaScript Fundamentals · Questena