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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.
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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.
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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.
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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.
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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.
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To optimize CRUD operations in a high-write-load scenario, employing ______ strategies like write-behind caching can be effective.

  • Caching
  • Synchronization
  • Scaling
  • Indexing
To optimize CRUD operations, caching strategies like write-behind caching can be effective, where data is cached and written back to the database asynchronously. Caching reduces the need to access the database for every write operation, improving performance.
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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.
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You are designing a system with a high read/write ratio, requiring efficient database interactions. How would you configure Sequelize or Mongoose to minimize database load and optimize performance?

  • Implement caching mechanisms.
  • Use Sequelize's "findOneAndUpdate" method.
  • Disable indexing on database columns.
  • Increase the database connection pool size.
To optimize performance with a high read/write ratio, implementing caching mechanisms is a common strategy. Options 2, 3, and 4 are not recommended for this purpose. "findOneAndUpdate" is not related to optimizing read/write efficiency. Disabling indexing can harm performance, and increasing the connection pool size alone won't optimize database interactions.
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In order to secure user passwords, it is best practice to store them using a ________ algorithm.

  • Hashing
  • Encryption
  • Decryption
  • Salting
To secure user passwords, it's best practice to store them using a hashing algorithm. Hashing takes the password and transforms it into a fixed-size string of characters (hash) using a one-way function. This makes it difficult to reverse-engineer the password from the stored hash.
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What is the primary use of the Events module in Node.js?

  • Managing file operations
  • Handling asynchronous code
  • Handling events and event-driven programming
  • Defining custom data types
The primary use of the Events module in Node.js is to facilitate event-driven programming. It allows you to create, emit, and handle custom events, making it a fundamental part of building real-time and responsive applications. Options A, B, and D are not the primary purposes of the Events module.
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