Npm Interview Questions And Answers

Npm Interview Questions list for experienced

  1. How many packages are there in NPM?
  2. What is NPM for?
  3. In which language we use npm?
  4. Who are the authors of npm?
  5. What are the different API functions supported by Node.js?
  6. What is the difference between synchronous and asynchronous functions?
  7. What is the control flow function?
  8. Why is Node.js so popular these days?
  9. What is an event loop in Node.js?
  10. What are the asynchronous tasks that should occur in an event loop?
  11. What is the order of execution in control flow statements?
  12. What is the primary reason to use the event-based model in Node.js?
  13. What is the --save option for npm install?
  14. Do I commit the package-lock.json file created by npm 5?
  15. What's the difference between dependencies, devDependencies and peerDependencies in npm package.json file?
  16. How can I uninstall npm modules in Node.js?
  17. Difference between npx and npm?
  18. How to list the npm user-installed packages?
  19. Command to remove all npm modules globally?
  20. How do I override nested NPM dependency versions?

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Top Npm interview questions and answers for freshers and experienced

What is Npm ?

Answer : NPM is the official package manager for Node.js, the non-blocking, asynchronous I/O framework that uses Google\'s V8 JavaScript engine. It can be used to install and publish CommonJS modules and JavaScript-based CLI programs.

Questions : 1 :: How many packages are there in NPM?

 350,000 packages. NPM is a package manager for Node.js packages, or modules if you like.A package in Node.js contains all the files you need for a module.Modules are JavaScript libraries you...View answers

Questions : 2 :: What is NPM for?

npm is the package manager for the Node JavaScript platform. It puts modules in place so that node can find them, and manages dependency conflicts intelligently. It is extremely configurable to...View answers

Questions : 3 :: In which language we use npm?


We use javascript in npm. Npm is a bundle director for the JavaScript programming language. It is the default bundle supervisor for the JavaScript runtime condition Node.js. It comprises of an order...View answers

Questions : 4 :: Who are the authors of npm?

 Isaac Z. Schlueter, Rebecca Turner, Kat Marchán were the author of Npm. The organization behind the npm programming is npm, inc, situated in Oakland, California. The CEO Bryan...View answers

Questions : 5 :: What are the different API functions supported by Node.js?

There are two types of API functions. They are as follows: Synchronous APIs: Used for non-blocking functions Asynchronous APIs: Used for blocking...View answers

Questions : 6 :: What is the difference between synchronous and asynchronous functions?


Synchronous functions are mainly used for I/O operations. They are instantaneous in providing a response to the data movement in the server and keep up with the data as per the requirement. If there...View answers

Questions : 7 :: What is the control flow function?

The control flow function is a common code snippet, which executes whenever there are any asynchronous function calls made, and they are used to evaluate the order in which these functions are...View answers

Questions : 8 :: Why is Node.js so popular these days?

Node.js has gained an immense amount of traction as it mainly uses JavaScript. It provides programmers with the following options: Writing JavaScript on the server Access to the HTTP stack File...View answers

Questions : 9 :: What is an event loop in Node.js?


When running an application, callbacks are entities that have to be handled. In the case of Node.js, event loops are used for this purpose. Since Node.js supports the non-blocking send, this is a...View answers

Questions : 10 :: What are the asynchronous tasks that should occur in an event loop?

Following are some of the tasks that can be done using an event loop asynchronously: Blocking send requests High computational requirement Real-time I/O...View answers

Questions : 11 :: What is the order of execution in control flow statements?

The following is the order in which control flow statements are used to process function calls: Handling execution and queue Data collection and storage Concurrency handling and...View answers

Questions : 12 :: What is the primary reason to use the event-based model in Node.js?

The event-based model in Node.js is used to overcome the problems that occur when using blocking operations in the I/O channel. Next in this blog comprising Node.js questions, you need to understand...View answers

Questions : 13 :: What is the --save option for npm install?

As of npm 5.0.0, installed modules are added as a dependency by default, so the --save option is no longer needed. The other save options still exist and are listed in the documentation for npm...View answers

Questions : 14 :: Do I commit the package-lock.json file created by npm 5?

package-lock.json is automatically generated for any operations where npm modifies either the node_modules tree, or package.json. It describes the exact tree that was generated, such that subsequent...View answers

Questions : 15 :: What's the difference between dependencies, devDependencies and peerDependencies in npm package.json file?

1. dependenciesDependencies that your project needs to run, like a library that provides functions that you call from your code.They are installed transitively (if A depends on B depends on C, npm...View answers

Questions : 16 :: How can I uninstall npm modules in Node.js?

Alias can be used to to uninstall node_modules package un alias for uninstall removes single package - npm un <PACKAGE_NAME> removes multiple packages by adding space between packages...View answers

Questions : 17 :: Difference between npx and npm?

NPM - Manages packages but doesn't make life easy executing any.NPX - A tool for executing Node packages. NPM: NPM by itself does not simply run any package. it doesn't run any package in a matter...View answers

Questions : 18 :: How to list the npm user-installed packages?

npm list -g --depth=0 1. npm: the Node package manager command line tool2. list -g: display a tree of every package found in the user’s folders (without the -g option it only shows the current...View answers

Questions : 19 :: Command to remove all npm modules globally?

For those using Windows, the easiest way to remove all globally installed npm packages is to delete the contents of: C:UsersusernameAppDataRoamingnpm You can get there quickly by typing...View answers

Questions : 20 :: How do I override nested NPM dependency versions?

The only solution that worked for me (node 12.x, npm 6.x) was using npm-force-resolutions developed by @Rogerio Chaves. First, install it by: npm install npm-force-resolutions --save-devYou can add...View answers
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