[Solved] Identify the error in this Ruby code using fork: pid = fork do puts 'Child running' end puts 'Parent running' Process.wait | Ruby

Ruby - Concurrent Programming

Identify the error in this Ruby code using fork:

pid = fork do
  puts 'Child running'
end
puts 'Parent running'
Process.wait

AProcess.wait called without PID argument

BMissing block for fork

Cfork does not return a PID

Dputs statements are inside the fork block

Step-by-Step Solution

Solution:

Step 1: Check usage of Process.wait
The Process.wait method should be called with the child's PID to wait for that specific process.
Step 2: Identify the error
In the code, Process.wait is called without any argument, which waits for any child process but can cause unexpected behavior or errors if multiple children exist.
Final Answer:
Process.wait called without PID argument -> Option A
Quick Check:
Always pass PID to Process.wait = A [OK]

Quick Trick: Pass child PID to Process.wait to avoid errors [OK]

Common Mistakes:

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