How can you read the entire content of a file named config.txt in Ruby without your program crashing if the file does not exist?

hard📝 Application Q9 of 15

Ruby - File IO

How can you read the entire content of a file named config.txt in Ruby without your program crashing if the file does not exist?

AUse <code>content = File.read('config.txt') || ''</code>

BUse <code>begin; content = File.read('config.txt'); rescue Errno::ENOENT; content = nil; end</code>

CUse <code>content = File.readlines('config.txt')</code> and check if empty

DUse <code>File.open('config.txt') { |f| content = f.read }</code> without rescue

Step-by-Step Solution

Solution:

Step 1: Recognize error possibility
File.read raises an exception if the file is missing.
Step 2: Use exception handling
Wrap the call in a begin-rescue block to catch Errno::ENOENT and handle missing file gracefully.
Step 3: Analyze other options
Use content = File.read('config.txt') || '' does not prevent exception; Use content = File.readlines('config.txt') and check if empty reads lines but does not handle missing file; Use File.open('config.txt') { |f| content = f.read } without rescue lacks error handling.
Final Answer:
Use begin-rescue to catch missing file error -> Option B
Quick Check:
Rescue Errno::ENOENT to avoid crash [OK]

Quick Trick: Rescue Errno::ENOENT to handle missing files [OK]

Common Mistakes:

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