[Solved] What will this Ruby code output?require 'csv' CSV.open('test.csv', 'w') do |csv| csv — Ans: Name,Age\nJohn,22\n | Ruby

Ruby - File IO

What will this Ruby code output?

require 'csv'
CSV.open('test.csv', 'w') do |csv|
  csv << ['Name', 'Age']
  csv << ['John', 22]
end
puts File.read('test.csv')

AName Age\nJohn 22

B['Name', 'Age']\n['John', 22]

CName,Age\nJohn,22\n

DError: File not found

Step-by-Step Solution

Solution:

Step 1: Understand CSV.open with 'w'
This opens 'test.csv' for writing and writes two rows as arrays, which become CSV lines.
Step 2: Reading the file content
File.read reads the file as text, showing comma-separated values with newlines.
Final Answer:
Name,Age\nJohn,22\n -> Option C
Quick Check:
CSV.open writes CSV lines correctly [OK]

Quick Trick: CSV.open with 'w' writes arrays as CSV lines [OK]

Common Mistakes:

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