You are building a high-performance API in Node.js, and you need to implement long-running computations without blocking incoming requests. How would you leverage the Event Loop and Non-Blocking I/O to achieve this?
- Use setTimeout for long-running computations.
- Offload computations to a separate thread using worker_threads.
- Block the Event Loop until computations are complete.
- Use synchronous I/O for improved performance.
To implement long-running computations without blocking incoming requests in Node.js, you should use worker_threads to offload the CPU-intensive tasks to separate threads, allowing the Event Loop to remain responsive. Options a, c, and d are not recommended because they involve blocking or potentially blocking the Event Loop, which can lead to poor performance and unresponsiveness.
To prevent accidental overwriting, the NPM registry does not allow republishing of any package version that has been ________.
- tagged
- unpublished
- locked
- archived
he NPM registry does not allow republishing of any package version that has been unpublished. Once a version is unpublished, it cannot be re-published to avoid potential issues with accidental overwriting.
You are initializing a new Node.js project and want to set up a private repository. How would you ensure that your project's package.json file is correctly configured to reflect this?
- Edit the package.json file and add a "repository" field with the URL of your private repository.
- Run a command like npm setup-repo to automatically configure the package.json file.
- Use a separate config.json file to specify the repository details.
- Add a comment in the README.md file with the repository information.
To correctly configure your project's package.json file for a private repository, you should add a "repository" field with the URL of your private repository. This allows others to find your code in the specified repository. The other options do not follow the standard practice for configuring the repository.
The const keyword in JavaScript is used to declare variables whose values are not supposed to be ________.
- modified
- read
- changed
The const keyword in JavaScript is used to declare variables whose values are not supposed to be changed or reassigned after they are initially set. It creates a constant reference to a value, making the variable immutable.
To use a shared ESLint configuration across multiple projects, you can create a ______ package that includes the shared ESLint configuration.
- config
- eslint
- share
- linter
To use a shared ESLint configuration across multiple projects, you can create an eslint package that includes the shared ESLint configuration. This allows you to maintain a consistent linting configuration across projects.
How does JavaScript’s class syntax relate to prototypal inheritance?
- JavaScript classes are a syntactical sugar on top of prototypal inheritance
- JavaScript classes are a replacement for prototypal inheritance
- JavaScript classes are unrelated to prototypal inheritance
- JavaScript classes are an extension of the Object prototype
JavaScript's class syntax is essentially syntactical sugar built on top of prototypal inheritance. Under the hood, classes in JavaScript still use prototypes to achieve inheritance and object creation. They provide a more familiar and structured way to work with prototypes.
What is the significance of the 'Agent' class in the http module of Node.js?
- The Agent class manages and optimizes the use of persistent connections for HTTP/HTTPS requests.
- The Agent class is used to create new HTTP request objects.
- The Agent class is used for authentication in HTTP requests.
- The Agent class is used for handling HTTP response headers.
The 'Agent' class in the http module of Node.js is significant because it manages and optimizes the use of persistent connections for HTTP/HTTPS requests. This helps improve performance by reusing connections for multiple requests.
In CRUD operations, which HTTP status code is suitable for a successful Create operation in RESTful APIs?
- 200 OK
- 201 Created
- 204 No Content
- 202 Accepted
In RESTful APIs, the HTTP status code "201 Created" is suitable for a successful Create operation. It indicates that the request has been fulfilled, and a new resource has been created as a result of it. Other status codes like "200 OK" and "204 No Content" are often used for different purposes.
How can mismanagement of dependencies and devDependencies impact the deployment of a Node.js application?
- It has no impact on deployment
- It may lead to security vulnerabilities
- It speeds up deployment
- It reduces application size
Mismanagement of dependencies and devDependencies can significantly impact deployment by potentially introducing security vulnerabilities. When dependencies are not properly managed, outdated or insecure packages may be included in the application, posing security risks.
The process of an object gaining access to properties and methods of another object through the prototype chain is known as ______.
- Inheritance
- Encapsulation
- Polymorphism
- Abstraction
The process of an object gaining access to properties and methods of another object through the prototype chain is known as "Inheritance." In JavaScript, objects inherit properties and methods from their prototypes in a chain-like fashion. This allows for code reuse and is a fundamental concept in object-oriented programming.