Node Flashcards
What is a CLI?
Command Line Interface.
Its when you use receive commands from a user in the form of lines of text.
What is a GUI?
graphical user interface, is a form of user interface that allows users to interact through graphical interface, instead of text-based UIs
Give at least one use case for each of the commands listed in this exercise.
man
cat
ls
pwd
echo
touch
mkdir
mv
rm
cp
-man (manual command)
an interface to the system reference manuals
-cat: print out the text of a file
-ls: list directory contents
a : all
F : append indicator to entries
-pwd: print name of current/working directory
-echo: display a line of text
-touch
it indicates that we have interacted with the file and let you access the file
-mkdir: make new directories
-mv: move and rename files
-rm: remove files or directories
-cp: copy files and directories
What is Node.js?
Its basically JS but taking out of the browser. The syntax will be the same. Transferres for back end the functionalities of JS.
What can Node.js be used for?
Build back end for web application, any animation, server sites, command line programs
What is a REPL?
A Read-Eval-Print Loop, or REPL, is a computer environment where user inputs are read and evaluated, and then the results are returned to the user.
Its something that allows us to have a language running in the background. Ex: digita node no terminal e usa math, console…
What is a computer process?
Program being run in the memory.
What is the process object in a Node.js program?
The process object is a globally available object that provides information about, and control over, the current Node.js process.
How do you access the process object in a Node.js program?
log process or require statement to import
What is the data type of process.argv in Node.js?
an array
What is a JavaScript module?
js file thats a selfing closed collection of functionalities and can be easily imported into other files and used
What values are passed into a Node.js module’s local scope?
exports, require, module, filename and dir name
Give two examples of truly global variables in a Node.js program.
process module and console module
What is the purpose of module.exports in a Node.js module?
Module exports tell Node. js which bits of code (functions, objects, strings, etc.) to export from a given file so that other files are allowed to access the exported code.
How do you import functionality into a Node.js module from another Node.js module?
call the local require() function ex: const add = require(‘./add’);
