Home » Quiz » Page 2894

Which of the following is a use case for the rest operator in function parameters?

  • Collecting multiple arguments into an array
  • Spreading an array into multiple arguments
  • Creating a shallow copy of an array
  • Combining two arrays into one
The primary use case for the rest operator in function parameters is to collect multiple arguments into an array. It allows a function to accept a variable number of arguments and access them as an array. The other options are not the intended use of the rest operator in this context.
Discuss it

What is the primary difference between null and undefined in JavaScript?

  • null represents an intentional absence of any value, while undefined indicates a variable has been declared but has not been assigned a value.
  • null represents a numeric value of zero, while undefined represents an empty string.
  • null is used for variables that are out of scope, while undefined is used for variables with no value.
  • null is a boolean value, while undefined is a number.
In JavaScript, null represents the intentional absence of any value, while undefined indicates that a variable has been declared but has not been assigned a value. Understanding this difference is crucial for handling data in JavaScript effectively.
Discuss it

Which of the following stream types is used for reading data in Node.js?

  • Writable Stream
  • Readable Stream
  • Duplex Stream
  • Transform Stream
Readable Streams are used for reading data in Node.js. They allow you to read data from various sources, such as files, HTTP requests, and more, in a non-blocking and efficient manner.
Discuss it

Which of the following is a primary feature of a testing framework like Mocha or Jest?

  • Test Automation
  • Database Management
  • Graphic Design
  • Web Development
A primary feature of testing frameworks like Mocha or Jest is Test Automation. These frameworks allow developers to write and run automated tests to verify that their code works correctly. This includes unit tests, integration tests, and more.
Discuss it

Which of the following is true regarding the 'this' keyword inside an arrow function?

  • The 'this' keyword in an arrow function refers to the global object.
  • The 'this' keyword in an arrow function refers to the object that contains the arrow function.
  • Arrow functions do not have a 'this' keyword.
  • The 'this' keyword in an arrow function refers to the 'this' value of the containing lexical context.
In arrow functions, the value of 'this' is inherited from the surrounding lexical context, which means it refers to the 'this' value of the containing function or block. Unlike regular functions, arrow functions do not have their own 'this' binding.
Discuss it

How do you install a specific version of a package using npm?

  • npm install @
  • npm get @
  • npm add @
  • npm update @
To install a specific version of a package using npm, you should use the npm install @ command. This allows you to specify the exact version you want to install. The other options do not provide the same functionality or may not work as expected.
Discuss it

Which method of the response object is used to end the response process in an HTTP server?

  • response.end()
  • response.finish()
  • response.complete()
  • response.stop()
The response.end() method is used to end the response process in an HTTP server. It finalizes the response and sends it to the client. The other options are not valid methods for ending the response.
Discuss it

How do you include partial views in EJS templates?

  • <%- include('partial') %>
  • <% include('partial') %>
  • <% partial('partial') %>
  • <%- partial('partial') %>
In EJS, you can include partial views using the <%- include('partial') %> syntax. This allows you to reuse and insert content from other EJS files into your main template, helping you create modular and maintainable views. The other options are not the correct syntax for including partials in EJS.
Discuss it

How can you send JSON data as a response using the http module in Node.js?

  • response.sendJSON(jsonDat
  • response.write(JSON.stringify(jsonData))
  • response.json(jsonData)
  • response.send(jsonData)
To send JSON data as a response using the http module in Node.js, you should use response.write(JSON.stringify(jsonData)). This method writes the JSON data as a string to the response. The other options are not valid methods for sending JSON data in the http module.
Discuss it

The ______ command can be used to update the package.json file to match the actual versions installed in the node_modules directory.

  • npm install
  • npm update
  • npm sync
  • npm check
The npm update command can be used to update the package.json file to match the actual versions installed in the node_modules directory. This command will update the version numbers of packages in package.json based on the versions currently installed.
Discuss it