Ruby - Arrays
Which of the following expressions returns elements from index 0 up to but not including index 3 in
arr = [7, 8, 9, 10, 11]?Which of the following expressions returns elements from index 0 up to but not including index 3 in arr = [7, 8, 9, 10, 11]?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Understand the difference between .. and ...
The .. operator includes the end index, while ... excludes it.Step 2: Select the correct range for indices 0 up to but not including 3
Using 0...3 excludes index 3, so it selects indices 0, 1, and 2.Final Answer:
arr[0...3] -> Option BQuick Check:
Three-dot range excludes end index = arr[0...3] [OK]
Quick Trick: Use ... to exclude the end index in ranges [OK]
Common Mistakes:
MISTAKES- Using .. which includes the end index
- Starting range from 1 instead of 0
- Confusing inclusive and exclusive ranges
Master "Arrays" in Ruby
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore Ruby Quizzes