[Solved] How can you modify this code to ensure the parent process waits for all child processes before continuing? 3.times do fork { puts 'Child' } end puts 'Parent' | Ruby

Ruby - Concurrent Programming

How can you modify this code to ensure the parent process waits for all child processes before continuing?

3.times do
  fork { puts 'Child' }
end
puts 'Parent'

AAdd Process.wait after the loop without arguments

BStore PIDs in an array and call Process.wait(pid) for each

CCall exit inside each fork block

DReplace fork with Thread.new

Step-by-Step Solution

Solution:

Step 1: Identify missing wait for children
Without waiting, parent prints immediately without waiting for children.
Step 2: Collect child PIDs and wait for each
Store PIDs from fork calls and wait for each to ensure synchronization.
Final Answer:
Store PIDs in an array and call Process.wait(pid) for each -> Option B
Quick Check:
Wait all children by tracking PIDs [OK]

Quick Trick: Track child PIDs to wait for all before parent continues [OK]

Common Mistakes:

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