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Polymorphism is the ability of an object to take on many forms. A real-time example is a Shape class with different subclasses like Circle, Square, and Triangle.
Polymorphism allows objects of different classes to be treated as objects of a common superclass.
It enables code reusability and flexibility in object-oriented programming.
For example, a Shape class can have a draw() method that is overridden by its subclasses ...
Authentication verifies the identity of a user, while authorization determines what actions they can perform.
Authentication confirms the user's identity through credentials like username and password.
Authorization grants or denies access to specific resources or actions based on the user's authenticated identity.
Authentication precedes authorization in the security process.
Example: Logging into a website with a usernam...
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I applied via Campus Placement and was interviewed before Mar 2023. There were 4 interview rounds.
Coding Test consist of 3 coding question, 2 sql questions and 10 output question.
I applied via Referral and was interviewed before Aug 2021. There was 1 interview round.
Answer on how to list in react and the input box
Use the map function to create a list in React
Use the state to store the input value
Use onChange event to update the state when the input value changes
Use onSubmit event to handle the form submission
I applied via Naukri.com and was interviewed before Oct 2023. There was 1 interview round.
Check if a string is the same forwards and backwards
Iterate through the string from both ends and compare characters
Use built-in functions like reverse() to check for palindrome
Ignore spaces and punctuation when checking for palindrome
I applied via Naukri.com and was interviewed in Dec 2024. There was 1 interview round.
Two dynamic programming challenges at the hard level on LeetCode and 10 medium-level SQL challenge.
I applied via Recruitment Consulltant and was interviewed in Jul 2021. There were 4 interview rounds.
Add 2 linked lists and return final linked list
Create a new linked list to store the sum
Traverse both linked lists simultaneously and add the corresponding nodes
Handle carry over while adding nodes
If one linked list is longer than the other, add the remaining nodes to the sum list
Finding an element in a rotated sorted array.
Use binary search to find the pivot point where the array is rotated.
Determine which half of the array the target element is in.
Perform binary search on that half of the array to find the target element.
Handle edge cases such as when the target element is at the pivot point.
Given a matrix of characters and a word, find if the word exists in the matrix.
Traverse the matrix and check if the first letter of the word matches any cell.
If it does, check if the adjacent cells match the next letter of the word.
Repeat until the entire word is found or no match is found.
Algorithm to maximize profit by buying and selling stocks.
Iterate through the array of stock prices
Keep track of the minimum price seen so far
Calculate the profit if sold at current price
Update maximum profit seen so far
Return maximum profit
I applied via LinkedIn and was interviewed before May 2021. There were 2 interview rounds.
var, let, and const are all used to declare variables in JavaScript, but they have different scoping rules and behaviors.
var has function scope and can be redeclared and reassigned
let has block scope and can be reassigned but not redeclared
const has block scope and cannot be reassigned or redeclared
Use const for values that won't change, let for values that will, and avoid var
CSS box model defines the layout of elements on a webpage. Padding and margin can apply to block-level elements but not to inline elements.
CSS box model consists of content, padding, border, and margin around an element.
Padding adds space inside the border of an element.
Margin adds space outside the border of an element.
Padding and margin can apply to block-level elements like <div> but not to inline elements lik
Arrow functions are shorter syntax for writing function expressions.
Arrow functions do not have their own 'this' keyword.
Arrow functions cannot be used as constructors.
Arrow functions do not have the 'arguments' object.
Arrow functions are more concise and easier to read.
Regular functions are better for methods and constructors.
JavaScript asynchronous model allows non-blocking code execution by using callbacks and promises.
JavaScript uses an event loop to handle asynchronous operations.
Callbacks are functions passed as arguments to other functions and executed when the operation is complete.
Promises are objects that represent the eventual completion or failure of an asynchronous operation.
Async/await is a newer syntax that allows writing asyn...
I applied via Recruitment Consulltant and was interviewed before Feb 2023. There was 1 interview round.
I appeared for an interview before May 2021.
Round duration - 60 Minutes
Round difficulty - Easy
It was an coding round
Compute the skyline of given rectangular buildings in a 2D city, eliminating hidden lines and forming the outer contour of the silhouette when viewed from a distance. Each building is ...
Compute the skyline of given rectangular buildings in a 2D city, eliminating hidden lines and forming the outer contour of the silhouette.
Iterate through the buildings and create a list of critical points (x, y) where the height changes.
Sort the critical points based on x-coordinate and process them to form the skyline.
Merge consecutive horizontal segments of equal height into one to ensure no duplicates.
Return the fin...
You need to determine all possible paths for a rat starting at position (0, 0) in a square maze to reach its destination at (N-1, N-1). The maze is represented as an N*N ma...
Find all possible paths for a rat in a maze from source to destination.
Use backtracking to explore all possible paths in the maze.
Keep track of visited cells to avoid revisiting them.
Recursively try moving in all directions (up, down, left, right) until reaching the destination.
Return a list of strings representing valid paths sorted in alphabetical order.
Round duration - 30 Minutes
Round difficulty - Easy
It was an HR round with some general questions. it was just for formality.
Tip 1 : Stay focused
Tip 2 : Practice coding questions.
Tip 3 : View previous interviews of the companies
Tip 1 : Don't lie on resume
Tip 2 : Just write in format that is catchy
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