What does the `git merge` command do?

Integrates all of the commits from one branch into another

Which three elements must a route have in Express?

HTTP method, path, handler function

You create a PR on GitHub from feature-branch to main, but it can't be merged due to a conflict. How should you fix it?

Pull to `main`, merge to `feature-branch`, then push `feature-branch`

Which situation causes a merge conflict?

2 commits change the same code, and git can't figure out the correct result

An asynchronous, event-driven environment for running JavaScript

What is a design pattern?

A common way of structuring the solution to a problem

What is `package.json` used for?

Storing a package's metadata, such as its name, version, and dependencies

The package manager for Node.js, and public registry of JavaScript modules

What is middleware in Express?

Functions that are run between receiving a request and sending a response

A server-side web framework for Node

Why is it important for Node.js to handle asynchronous operations?

Allows long-running tasks to be executed without blocking other operations

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Week 09 - Node.js, npm, Express & Gitflow

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Questions 21

Answers

1
What does the `git merge` command do?
Enables a developer to interactively rewrite the commit history of a branch
Integrates all of the commits from one branch into another
Opens a pull request for a set of changes
Merges a specified commit from a source branch into a target branch
2
How do you import an npm package called `library` (that is installed in `node_modules/`) when using CommonJS modules?
`import { library };`
`import("library");`
`require("library");`
`include "moduleNameOrPath";`
3
In an Express route handler, which property can be used to access query parameters from the request URL?
`useParams()`
`req.query`
`res.queryString`
`req.params`
4
Which three elements must a route have in Express?
HTTP method, path, handler function
HTTP method, URL, output
action, endpoint, request object
get, location, response
5
You create a PR on GitHub from feature-branch to main, but it can't be merged due to a conflict. How should you fix it?
Send a strongly-worded email to the lead dev asking them to merge the PR
Close the PR, create a new branch, fix the conflict, then create a new PR
Pull to `main`, merge to `feature-branch`, then push `feature-branch`
Check out the `main` branch, merge `feature-branch`, then push `main`
6
Which situation causes a merge conflict?
A PR is opened for a feature that doesn't have the latest changes from main
A developer attempts to merge older commits into a branch
2 commits change the same code, and git can't figure out the correct result
A developer runs `git merge` to combine two different files
7
Which snippet configures a middleware function in Express to parse the body of a POST request?
`app.use(express.body())`
`app.use(req.body)`
`app.use(express.static('/post'))`
`app.use(express.json())`
8
When starting a new Node.js project, which command will create a `package.json` file?
`npm init`
`git add package.json`
`npm create package.json`
`git init`
9
What is Node.js?
A program for creating interactive console-style games
A development environment for running programs in any language
A program that is used exclusively for creating web servers in JavaScript
An asynchronous, event-driven environment for running JavaScript
10
Which git command fetches and merges new commits from a remote branch into a local branch?
`git integrate`
`git fetch`
`git push`
`git pull`
11
What is a design pattern?
A pattern used to style web components
A common way of structuring the solution to a problem
A set of best practices used when designing user interfaces
A strategy for developing effective algorithms using pseudocode
12
Which git command creates and checks out a new branch?
`git add <branch-name>`
`git checkout -b <branch-name>`
`git switch <branch-name>`
`git checkout-branch <branch-name>`
13
What is `package.json` used for?
Version control of a package's source code
It is an empty file indicating the containing directory is an npm package
Storing installation instructions, like a README
Storing a package's metadata, such as its name, version, and dependencies
14
In what directory are the dependencies of a JavaScript package installed?
`src/`
`node_packages/`
`node_modules/`
`dependencies/`
15
How do you export something called `myExport` when using CommonJS modules?
`export default { myExport }`
`export myExport;`
`export({myExport})`
`module.exports = myExport;`
16
When a Pull Request is merged on GitHub, those changes are automatically integrated into the local repository.
False
True
17
What is npm?
Node Performance Manager, a performance measurement tool for JavaScript
A cloud service for hosting JavaScript packages, like GitHub
A format for plain text files, similar to JSON
The package manager for Node.js, and public registry of JavaScript modules
18
Which of these are all valid response methods in Express?
`status`, `response`, `xml`
`send`, `json`, `status`
`json`, `xml`, `html`
`send`, `receive`, `reply`
19
What is middleware in Express?
A package that routes client requests to the server
Functions that are run between receiving a request and sending a response
A pattern for handling authentication
A library that allows express to serve static files
20
What is Express?
A library used for scraping websites
An alternative browser to Chrome
A server-side web framework for Node
A JavaScript HTTP client library
21
Why is it important for Node.js to handle asynchronous operations?
It is unknown when a user will click on a button
Allows long-running tasks to be executed without blocking other operations
A web server must be able to handle multiple clients efficiently
Node.js runs JS code outside the browser, which is an async environment

Week 09 - Node.js, npm, Express & Gitflow Flashcards | StudBud