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I applied via campus placement at Saranathan College of Engineering, Tiruchirapalli and was interviewed before Apr 2023. There were 4 interview rounds.
Aptitude questions based on number system and logical reasonings.
I was asked to write program for hotel booking application.
Query to fetch records by username and group by age
Use WHERE clause to filter records by username
Use GROUP BY clause to group records by age
Example: SELECT * FROM table_name WHERE username = 'example_username' GROUP BY age
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Palindrome code should be designed to check if a given string is the same forwards and backwards.
Create a function that takes a string as input
Remove any spaces and punctuation from the string
Reverse the string and compare it to the original string to check if it is a palindrome
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
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.
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.
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
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 ...
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
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.
I was interviewed in Dec 2024.
A function is a piece of code that is called by name, while a method is a function that is associated with an object.
Functions are standalone blocks of code, while methods are functions that are part of a class or object.
Functions can be called independently, while methods are called on an object.
Functions do not have access to data stored in an object, while methods can access and modify object data.
posted on 5 Feb 2025
posted on 13 Aug 2024
I applied via Referral and was interviewed in Jul 2024. There was 1 interview round.
Single page application is a web application that loads a single HTML page and dynamically updates the content as the user interacts with the app.
SPA uses AJAX and HTML5 to create fluid and responsive user experience.
It eliminates the need for page reloading during use, making it faster and more efficient.
Examples include Gmail, Facebook, and Google Maps.
State management is the process of managing the state of an application, including data flow, user interface updates, and user interactions.
State management involves storing and updating the state of an application to ensure data consistency.
It helps in managing user interface updates based on changes in the application state.
State management is crucial for handling user interactions and maintaining a seamless user exp...
I applied via LinkedIn and was interviewed in Sep 2024. There was 1 interview round.
I applied via Naukri.com and was interviewed in Feb 2024. There were 2 interview rounds.
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