[Solved] What will this Ruby code print? t1 = Thread.new { sleep 0.2; puts "First" } t2 = Thread.new { puts "Second" } t1.join | Ruby

Ruby - Concurrent Programming

What will this Ruby code print?

t1 = Thread.new { sleep 0.2; puts "First" }
t2 = Thread.new { puts "Second" }
t1.join

AFirst

BSecond First

CSecond

DFirst Second

Step-by-Step Solution

Solution:

Step 1: Analyze thread execution order
Thread t2 prints "Second" immediately. Thread t1 sleeps 0.2 seconds before printing "First".
Step 2: Understand join effect
Main thread waits for t1 to finish but does not wait for t2. So "Second" prints first, then "First".
Final Answer:
Second\nFirst -> Option B
Quick Check:
Sleep delays first thread, so second prints first [OK]

Quick Trick: Sleep delays thread; join waits only for specified thread [OK]

Common Mistakes:

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