GyanMatrix Technologies Interview Questions and Answers

I prefer languages that enhance productivity and maintainability, such as Python, JavaScript, and Java, depending on the project needs.

• Python: Great for data analysis and machine learning with libraries like Pandas and TensorFlow.

• JavaScript: Essential for web development, enabling interactive front-end experiences with frameworks like React.

• Java: A strong choice for enterprise applications due to its robustness and sca...read more

The software development process is a structured approach to creating software applications through various stages.

• 1. Requirements Gathering: Identify what the software needs to do. Example: User interviews to gather feature requests.

• 2. Design: Create architecture and design specifications. Example: UML diagrams to visualize system components.

• 3. Implementation: Write the actual code based on design. Example: Using Pyth...read more

Processes are independent execution units with their own memory, while threads are lightweight and share memory within a process.

• A process is an independent program in execution, while a thread is a smaller unit of a process.

• Processes have their own memory space; threads share the same memory space of their parent process.

• Creating a process is more resource-intensive than creating a thread.

• Example: A web browser (proce...read more

REST stands for Representational State Transfer, a software architectural style for designing networked applications.

• REST is based on stateless communication between client and server.

• It uses standard HTTP methods like GET, POST, PUT, DELETE.

• Resources are identified by URIs (Uniform Resource Identifiers).

• Data is typically exchanged in formats like JSON or XML.

• RESTful APIs are widely used in web services for their simpl...read more

Find the second most occurrence of string in an array of strings.

• Create a dictionary to store the count of each string in the array

• Sort the dictionary by count in descending order

• Return the key of the second element in the sorted dictionary

I have a solid understanding of JS, Node.js, React, and MongoDB, with practical experience in building full-stack applications.

• JavaScript: Proficient in ES6+ features, asynchronous programming, and DOM manipulation. Example: Built a dynamic web app using vanilla JS.

• Node.js: Experienced in building RESTful APIs and handling server-side logic. Example: Developed a Node.js API for a task management app.

• React: Skilled in c...read more

Modules in Node.js are reusable blocks of code that encapsulate related functionality.

• Modules in Node.js can be built-in modules like fs (file system) or third-party modules like express.

• Modules help in organizing code into separate files for better maintainability and reusability.

• Modules can be imported using the require() function in Node.js.

Indexes in MongoDB improve query performance by allowing the database to quickly locate and retrieve specific documents.

• Indexes help to speed up query performance by allowing the database to quickly locate specific documents based on the indexed fields.

• Without indexes, MongoDB would have to perform a collection scan, which can be slow and resource-intensive.

• Indexes can be created on single fields or compound fields to ...read more

Hooks are a feature in React that allow you to use state and other React features in functional components. useRef is a hook that allows you to create a mutable object that persists for the lifetime of the component.

• Hooks are used to add state and lifecycle methods to functional components in React

• useRef is used to create a mutable reference that persists between renders

• useRef can be used to access DOM elements directl...read more