How can a method be added to an object's prototype?
- object.prototype.addMethod(methodName, method)
- prototype.addMethod(object, methodName, method)
- Object.prototype.methodName = method
- object.methodName = method
To add a method to an object's prototype in JavaScript, you can assign the method to the prototype property of the constructor function that created the objects. For example, Object.prototype.methodName = method. This way, all objects created from that constructor will inherit the method. The other options do not follow the correct syntax for adding a method to a prototype.
How does the 'events' module in Node.js help in managing asynchronous operations?
- It provides a way to pause and resume asynchronous tasks.
- It allows you to execute asynchronous tasks in parallel.
- It provides an event-driven architecture for handling asynchronous operations.
- It enables synchronous execution of asynchronous tasks.
The 'events' module in Node.js is designed to facilitate event-driven programming, allowing you to handle asynchronous operations by defining event listeners and emitters. It does not provide mechanisms for pausing, resuming, or executing tasks synchronously.
A ______ request is sent by the browser before the actual request to check the server’s CORS policy.
- preflight
- probe
- inspection
- initiation
A "preflight" request is sent by the browser before the actual cross-origin request to check the server's CORS policy. It helps the browser determine whether the actual request is safe to send and whether the server will allow it.
During the development of a Node.js application, you realize that multiple packages are not compatible with each other due to different required versions. How would you resolve the incompatibility between these packages?
- Delete one of the incompatible packages
- Use a tool like npm-shrinkwrap to lock package versions
- Update all packages to their latest versions
- Modify your code to work with the conflicting versions
To resolve package version incompatibility, you can use a tool like npm-shrinkwrap to lock package versions, ensuring that all team members use the same versions. Deleting packages or updating them indiscriminately can introduce issues.
The process object in Node.js emits a ______ event when the Node.js process is about to exit.
- beforeExit
- exit
- shutdown
The process object in Node.js emits the beforeExit event just before the Node.js process is about to exit. This event allows you to perform cleanup tasks before the process terminates.
When using semantic versioning, what is the recommended way to handle deprecations?
- Deprecations should be documented in the code comments only.
- Deprecations should be ignored as they don't fit into semantic versioning.
- Deprecations should be marked as 'deprecated' in code comments and, if necessary, in the README or documentation.
- Deprecations should be removed from the codebase without any notice.
In semantic versioning, it's recommended to mark deprecations as 'deprecated' in code comments and, when applicable, in the README or documentation. This helps users of the library or package understand what's changing and how it might impact their code.
The process of rewriting a SQL query to improve its efficiency without changing its behavior is known as ________.
- Query Tuning
- Query Optimization
- Query Refactoring
- Query Modification
The process of rewriting a SQL query to improve its efficiency without changing its behavior is known as "Query Optimization." This involves making changes to the query or its execution plan to make it faster while still returning the same results.
What will be the default encoding when converting a buffer to a string in Node.js?
- utf-8
- binary
- ascii
- base64
When converting a buffer to a string in Node.js, the default encoding is utf-8. It's important to specify the encoding when performing this conversion, as using the wrong encoding can lead to incorrect results or data corruption.
Which command is used to install Express in your Node.js project?
- npm install express
- npm express install
- install -g express
- node express-install
To install the Express framework in your Node.js project, you should use the command npm install express. This command will download and install the Express package and its dependencies. The other options are not valid ways to install Express.
To integrate ESLint with your editor, you can use an ESLint ________ for your specific editor.
- Extension
- Plugin
- Configuration
- Package
To integrate ESLint with your code editor, you can use an ESLint extension specifically designed for your editor. These extensions provide a user-friendly interface for running ESLint within your coding environment. While plugins and configurations are related to ESLint setup, they do not directly integrate with the editor. Packages, in this context, are not typically used for integrating ESLint with editors.