You want to change the current working directory to projects, create a new folder new_app inside it, and then list the contents of projects. Which sequence of Ruby commands correctly does this?

hard📝 Application Q15 of 15

Ruby - File IO

You want to change the current working directory to projects, create a new folder new_app inside it, and then list the contents of projects. Which sequence of Ruby commands correctly does this?

ADir.chdir('projects') Dir.mkdir('new_app') puts Dir.entries('.')

BDir.mkdir('new_app') Dir.chdir('projects') puts Dir.entries('new_app')

CDir.entries('projects') Dir.mkdir('new_app') Dir.chdir('new_app')

DDir.chdir('new_app') Dir.mkdir('projects') puts Dir.entries('.')

Step-by-Step Solution

Solution:

Step 1: Change directory to 'projects'
Using Dir.chdir('projects') sets the current directory to 'projects'.
Step 2: Create 'new_app' inside 'projects'
Dir.mkdir('new_app') creates the new folder inside the current directory.
Step 3: List contents of current directory
Dir.entries('.') lists all files and folders inside 'projects', including 'new_app'.
Final Answer:
Dir.chdir('projects') Dir.mkdir('new_app') puts Dir.entries('.') -> Option A
Quick Check:
Change dir, create folder, list contents = Dir.chdir('projects') Dir.mkdir('new_app') puts Dir.entries('.') [OK]

Quick Trick: Change dir first, then create folder, then list with Dir.entries('.') [OK]

Common Mistakes:

Creating folder before changing directory
Listing wrong directory contents
Changing to new folder before creating it

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You want to change the current working directory to projects, create a new folder new_app inside it, and then list the contents of projects. Which sequence of Ruby commands correctly does this?

Step 1: Change directory to 'projects'

Step 2: Create 'new_app' inside 'projects'

Step 3: List contents of current directory

Final Answer:

Quick Check:

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