[Solved] Which Ruby code correctly opens a file for writing using a block? — Ans: File.open('data.txt', 'w') do |file| file.puts 'Hello' end | Ruby

Ruby - File IO

Which Ruby code correctly opens a file for writing using a block?

AFile.read('data.txt', 'w') do |file| file.puts 'Hello' end

BFile.open('data.txt', 'r') do |file| file.puts 'Hello' end

CFile.open('data.txt', 'w') do |file| file.puts 'Hello' end

DFile.write('data.txt', 'w') do |file| file.puts 'Hello' end

Step-by-Step Solution

Solution:

Step 1: Identify correct method and mode for writing
File.open with mode 'w' opens file for writing; block syntax ensures file closes.
Step 2: Check each option's correctness
File.open('data.txt', 'w') do |file| file.puts 'Hello' end uses File.open with 'w' and block correctly; others misuse methods or modes.
Final Answer:
File.open('data.txt', 'w') do |file|\n file.puts 'Hello'\nend -> Option C
Quick Check:
File.open + 'w' + block = correct syntax [OK]

Quick Trick: Use File.open with 'w' mode and a block to write safely [OK]

Common Mistakes:

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Which Ruby code correctly opens a file for writing using a block?