Misc Flashcards
Roughly how many string methods are there according to the MDN Web docs?
20+
Roughly how many array methods are there according to the MDN Web docs?
38+
What three-letter acronym should you always include in your Google search about a JavaScript method or CSS property?
MDN
What is “abstraction”?
Taking complex things and making them simpler to work with
What does API stand for?
application programming interface
What is the purpose of an API?
defines interactions between multiple software intermediaries. It defines the kinds of calls or requests that can be made, how to make them, the data formats that should be used, the conventions to follow, etc.
What is a client?
Hardware/software that requests a service from a server
What is a server?
Runs server programs that share their resources with clients
What is a CLI?
Stands for command-line interface,
Used by developers and processes commands to a computer program using text
What is a GUI?
Stands for graphical user interface,
Used primarily by the end user and is a form of user interface that allows users to interact with electronic devices through graphical icons
Give at least one use case for each of the commands listed in this exercise.
Man: shows a manual for a command Cat: concatenate txt files Ls: list contents of a directory Pwd: print the working directory Echo: create a text line Touch: create timestamps Mkdir: make directories Mv: rename file Rm: delete file Cp: copy and rename files
What are the three virtues of a great programmer?
Laziness, hubris, impatience
What is a computer process?
The instance of a program that’s being executed by one or many threads.
Execution of instructions provided by programs after they are loaded from the computer’s drive into memory
Roughly how many computer processes are running on your host operating system (Task Manager or Activity Monitor)?
450
Why should a full stack Web developer know that computer processes exist?
To ensure that the programs they write work efficiently and don’t require too many processes to run
What is different between “blocking” and “non-blocking” with respect to how code is executed?
Non-blocking is more efficient because it allows longer processes to happen in the background while other code is being executed, whereas blocking blocks the rest of the code from running until that longer process finishes.
Blocking – things are clogging stack.
Non-blocking – things are also in task queue
What is a directory?
A collection of files or other directories
What is a relative file path?
A file path relative to the currently accessed file
What is an absolute file path?
The complete path to a file starting from the root
What is a client?
A program that requests a service from servers (i.e. web browser)
What is a server?
Piece of software that shares its resources with clients
What is NPM?
- A public software registry which allows users to share and borrow packages
- Consists of three components: the website, the command line interface, and the registry
What is a package?
A file or directory with one or more files including a package.json file
How can you create a package.json with npm?
Navigate to the root directory of the package, use the command npm init
What is a dependency and how to you add one to a package?
- A package required by an application to run
- Can be added after the npm install command
What happens when you add a dependency to a package with npm?
It appears in the package.json file under a dependencies property
What is “syntactic sugar”?
Syntax that makes code easier to read or use
