Modern JavaScript from the Beginning - Second Edition - os Module

The video tutorial provides an in-depth look at the OS module in Node.js, explaining how it can be used to gather information about the operating system, such as CPU architecture, platform type, and memory status. The tutorial covers practical examples of using methods like ARC, platform, CPUs, free mem, total mem, home dir, uptime, host name, and network interfaces. It also highlights the integration of the OS module with Electron applications, demonstrating how to access and utilize system information for building JavaScript desktop applications.

What is the primary use of the OS module in Node.js?

• To create web servers

• To interact with the operating system

• To manage databases

• To design user interfaces

Which framework is mentioned as using the OS module extensively?

• React

• Angular

• Electron

• Vue

What does the 'arc' method in the OS module return?

• CPU architecture

• Network interfaces

• Total memory

• Operating system name

Which value does the 'platform' method return for a Mac operating system?

• Linux

• Unix

• Darwin

• Win32

What type of information does the 'cpus' method provide?

• User account information

• Network configuration

• File system structure

• Logical CPU core details

How is free memory calculated in gigabytes using the OS module?

• By dividing by 1024 once

• By dividing by 1024 three times

• By dividing by 1024 twice

• By multiplying by 1024

What does the 'totalMem' method in the OS module return?

• Total disk space

• Total system memory

• Total number of CPU cores

• Total number of users

Which method would you use to find the home directory of the current user?

• os.arch()

• os.networkInterfaces()

• os.platform()

• os.homeDir()

What does the 'uptime' method in the OS module measure?

• Time since last update

• Time since last shutdown

• Time since last login

• Time since last reboot

Which method provides the host name of the operating system?

• os.hostName()

• os.cpus()

• os.platform()

• os.arc()