[Solved] What will be the output of this Ruby code if file.txt initially contains "Line1\n"?File.open('file.txt', 'a') do |f| f.puts 'Line2' end content = File.read('file.txt') puts content | Ruby

Ruby - File IO

What will be the output of this Ruby code if file.txt initially contains "Line1\n"?

File.open('file.txt', 'a') do |f|
  f.puts 'Line2'
end
content = File.read('file.txt')
puts content

ALine2\n

BLine1\nLine2\n

CLine1\n

DError because file is opened in append mode

Step-by-Step Solution

Solution:

Step 1: Understand append mode effect
Opening with 'a' adds new content at the end without deleting existing data.
Step 2: Analyze code output
After appending 'Line2', reading the file shows original 'Line1' plus new 'Line2' on separate lines.
Final Answer:
Line1\nLine2\n -> Option B
Quick Check:
Append mode adds lines, output includes both lines = A [OK]

Quick Trick: Append mode keeps old content, adds new at end [OK]

Common Mistakes:

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What will be the output of this Ruby code if file.txt initially contains "Line1\n"?