You want to run a Ruby script data_processor.rb that requires an environment variable DATA_PATH. How do you run it in one command setting the variable temporarily?

hard📝 Application Q8 of 15

Ruby - Basics and Runtime

You want to run a Ruby script data_processor.rb that requires an environment variable DATA_PATH. How do you run it in one command setting the variable temporarily?

Aset DATA_PATH=/tmp/data; ruby data_processor.rb

BDATA_PATH=/tmp/data ruby data_processor.rb

Cruby DATA_PATH=/tmp/data data_processor.rb

Druby -e DATA_PATH=/tmp/data data_processor.rb

Step-by-Step Solution

Solution:

Step 1: Understand setting environment variables temporarily
In Unix-like terminals, prefixing a command with VAR=value sets the variable only for that command.
Step 2: Identify correct syntax
DATA_PATH=/tmp/data ruby data_processor.rb runs the script with the variable set temporarily.
Final Answer:
DATA_PATH=/tmp/data ruby data_processor.rb -> Option B
Quick Check:
Prefix command with VAR=value to set env var temporarily [OK]

Quick Trick: Prefix command with VAR=value to set env var temporarily [OK]

Common Mistakes:

Using Windows 'set' syntax in Unix shell
Passing env var as argument to ruby
Using ruby -e incorrectly

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You want to run a Ruby script data_processor.rb that requires an environment variable DATA_PATH. How do you run it in one command setting the variable temporarily?

Step 1: Understand setting environment variables temporarily

Step 2: Identify correct syntax

Final Answer:

Quick Check:

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