Generally, Buffer refers to the particular memory location in memory. Buffer and array have junior node js developer some similarities, but the difference is that array can be any type, and it can be resizable. In NodeJS, you can import external libraries (also known as packages) using the require() function. This allows you to include modules or packages that you have installed via npm (Node Package Manager). The mathOperations.js module exports the add and subtract functions using module.exports.
- Node.js is a single-threaded application with event looping for async processing.
- It is a type of interactive programming interface that evaluates user input and prints the result.
- It is typically used to update parts of a web page without requiring a full page reload.
- V8 uses garbage collection algorithms to determine which parts of v8 heap can be released and reclaimed.
Take Your Hiring to the Next Level
We use the require module to import the External libraries in NodeJS. The result returned by require() is stored in a variable, which is used to invoke the functions using the dot notation. In this section, we will discuss basic NodeJS questions asked in the interview suitable for freshers. This command installs nodemon and adds it to the devDependencies section of your package.json file. Dev dependencies are used during development and are not required in production.
Describe the flow of HTTPS requests through the Spring Boot application.
HTTP POST is a request method supported by HTTP used by the World Wide Web. By design, the POST request method requests that a web server accepts the data enclosed in the body of the request message, most likely for storing it. Dependency Injection is the main functionality provided by Spring IOC(Inversion of Web development Control).
Which types of network applications can you build using Node.js?
HR managers use this coding challenge to assess candidates’ ability to solve problems independently and produce high-quality code. Entry-level candidates are those who just graduated from college or have little to no work experience. They may programmer not have the skills and knowledge that more experienced candidates have. However, they can be valuable assets to your team if they have the right skills and attitude.
- The ‘end’ event is emitted when the reading is finished, and the ‘error’ event is emitted if an error occurs during the reading process.
- In this example, the master process (cluster.isMaster) creates a cluster of worker processes using cluster.fork().
- Control flow in NodeJS refers to the sequence in which statements and functions are executed.
- Common Junior Backend Developer interview questions, how to answer them, and example answers from a certified career coach.
Whether you are a fresher or an experienced professional, these questions will enhance your skills and help you excel in backend development interviews. This guide compiles the top 100 Node.js interview questions and answers — from the basics to advanced topics — so you can walk into your interview with confidence. Therefore, make sure you use Node.js assessments when candidates respond to your job application. Once you’ve shortlisted applicants, you can ask them Node.js interview questions in the interview. Top applicants will understand that there are many modules in Node.js, including HTTP, query string, URL, and stream types.
- Another important security feature in Node.js is using TLS/SSL to encrypt data in transit.
- Your preference between the two can reveal your thought process and the efficiency of the solutions you deliver in the context of backend development.
- However, they can be valuable assets to your team if they have the right skills and attitude.
- Authentication is the process of verifying a user’s identity while authorization is determining what actions can be performed.
- Ask them to describe how they approach debugging asynchronous code and the various tools they utilize in the debugging process.
What is the use of app.use() in Express.js?
Understanding RESTful APIs is a fundamental skill for a backend developer, as they are the backbone of communication between different software applications. This allows them to assess your technical expertise and problem-solving abilities in a real-world scenario. Whenever an event gets fired, its listener function starts executing. Node.js has multiple in-built events available through the events module and EventEmitter class which is used to bind events and event listeners. Are you a hiring manager looking to hire a junior developer for an upcoming development project?