SentientGeeks Intern Interview Questions and Answers for Experienced

Q1. React hooks related How to use them
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Q2. About web socket real time messaging
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Q3. About react router dom
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Q1. What motivates you to join Zidio Development as opposed to other companies?
Ans. 
Zidio Development's innovative projects and collaborative culture inspire my passion for technology and personal growth.
• Zidio's commitment to cutting-edge technology aligns with my desire to work on innovative projects, like their recent AI initiative.

• The collaborative culture at Zidio fosters teamwork, which I value as it enhances creativity and problem-solving.

• Zidio's focus on professional development through mentors...read more
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Q2. How will your experience with Zidio development contribute to your career growth?
Ans. 
My experience with Zidio development will enhance my technical skills, teamwork, and problem-solving abilities, crucial for my career growth.
• Developed proficiency in programming languages like Java and Python, which are essential for software development roles.

• Collaborated with a diverse team, improving my communication skills and ability to work in a team-oriented environment.

• Gained hands-on experience with agile meth...read more
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Q1. How did you collaborate with other team members during your internships?
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Q2. Can you describe how you handled feedback from your senior developers or mentors?
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Q1. Comments on Javascript
Ans. 
JavaScript is a versatile, high-level programming language primarily used for web development, enabling interactive and dynamic content.
• JavaScript is an event-driven language, allowing developers to create responsive user interfaces. Example: Handling button clicks.

• It supports object-oriented programming, enabling code reuse and modularity. Example: Creating classes and objects.

• JavaScript can manipulate the DOM, allowi...read more
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Q2. Javascript library
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Q3. Css, html, React
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Q1. Tell us about a project you've worked on using the MERN stack.
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Q2. How do you manage routes in a MERN stack application?
Ans. 
Managing routes in a MERN stack involves defining API endpoints and client-side routes for seamless navigation and data handling.
• Use Express.js for backend routing: Define routes in a separate file, e.g., 'routes/user.js'.

• Implement RESTful API conventions: Use GET, POST, PUT, DELETE methods for CRUD operations.

• Utilize React Router for client-side routing: Set up routes in 'App.js' using <BrowserRouter> and <Ro...read more
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There will be 3 coding questions. They are of medium and hard level.

Q1. Sort array consisting 0's 1's and 2's without inbuilt functions
Ans. 
Sort an array of 0's, 1's, and 2's without using inbuilt functions.
• Use three pointers to keep track of the last index of 0's, 1's, and 2's

• Iterate through the array and swap elements based on their value

• Continue until all elements are sorted
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Q1. Os cn related questions
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Q1. Java questions and general hr questions
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Q1. Rate yourself in js, node js, react, MongoDB (separately)
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Q2. Typeof null, typeof undefined, typeof {}, typeof NaN
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Q3. What changes came in es6
Ans. 
ES6 introduced several new features and improvements to JavaScript, making it more powerful and efficient.
• Arrow functions for more concise syntax

• Let and const for block-scoped variables

• Classes for easier object-oriented programming

• Template literals for easier string interpolation

• Default parameters and rest parameters for function arguments

• Destructuring assignment for easier data extraction

• Promises for asynchronous prog
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Q4. This keyword, closures, hoisting
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Q5. Are let and cont variables hoisted?
Ans. 
Yes, let and const variables are hoisted but not initialized.
• let and const variables are hoisted to the top of their block scope, but they are not initialized until the actual line of code is executed.

• This means that you cannot access a let or const variable before it is declared in the code.

• For example, trying to access a let variable before it is declared will result in a ReferenceError.
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Q6. What is global context
Ans. 
Global context refers to the overall environment or setting in which something exists or operates.
• Global context encompasses all variables, functions, and objects that are accessible throughout an entire program.

• It can be thought of as the 'big picture' view of a program's execution.

• In web development, global context includes the window object in JavaScript.
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Q7. What is temporal deadzone
Ans. 
Temporal dead zone is a period during the variable creation process where accessing the variable results in a ReferenceError.
• Occurs when trying to access a variable before it has been declared with let or const

• Happens due to the variable being in the temporal dead zone until it is declared

• Example: accessing a variable before its declaration will result in a ReferenceError
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Q8. What is modules? types of modules in nodejs
Ans. 
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.
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Q9. Index in mongodb, why we need index, is index good or bad?
Ans. 
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
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Q10. What are hooks , use of useRef
Ans. 
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
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Q11. Fs module, http module, worker thread?
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Q12. Why we use mongoose not mongodb driver?
Ans. 
Mongoose is an Object Data Modeling (ODM) library for MongoDB that provides a higher level of abstraction and simplifies interactions with the database.
• Mongoose provides schema validation which helps maintain data integrity.

• Mongoose simplifies querying and data manipulation with built-in functions.

• Mongoose supports middleware functions for pre and post processing of data operations.
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