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.
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.
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.
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.
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.
In Node.js, to interact with SQL databases, an ORM like ______ can be used.
- Sequelize
- MongoDB
- Express
- Mongoose
In Node.js, Sequelize is a popular Object-Relational Mapping (ORM) library used to interact with SQL databases. It provides an abstraction layer for working with databases, making it easier to manage and query relational data. Options 2, 3, and 4 are not ORMs and are not used for SQL databases.
In E2E testing, tests are executed in an environment that simulates a ________ user environment.
- production
- controlled
- real
- isolated
In End-to-End (E2E) testing, tests are executed in an environment that simulates a real user environment. This means the tests mimic the actions and interactions of real users with the application, helping ensure that the application works as expected in a production-like setting. While controlled and isolated environments may be used in testing, they are not the primary focus of E2E testing. Production environments are typically not used for testing to avoid risks to the live system.
How can you prevent replay attacks when using OAuth 2.0?
- Use Nonce Values
- Use Long-lived Tokens
- Use Weak Passwords
- Use Static Client IDs
Preventing replay attacks in OAuth 2.0 involves using Nonce values (number used once) to ensure that each request is unique and can't be replayed. Nonces are typically used with authorization codes to add an extra layer of security. The other options are not effective in preventing replay attacks.
Which method is commonly used in Node.js to handle errors in callbacks?
- try...catch
- process.exit()
- console.error()
- callback(error)
In Node.js, it's common to handle errors in callbacks by passing an error object as the first argument to the callback function. This allows the callback to check if an error occurred during the asynchronous operation and take appropriate action. The other options (try...catch, process.exit(), and console.error()) are not used to handle errors in callbacks but serve different purposes.
Which method can be used to add new elements to an array in JavaScript?
- append()
- push()
- add()
- insert()
To add new elements to an array in JavaScript, you should use the push() method. It adds one or more elements to the end of an array. The other options are not valid methods for adding elements to an array in JavaScript.