Housing.com Interview Questions, Process, and Tips

Q1. Two coding question regarding dp and tree
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Q1. 1 system design question
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Q1. Basic hr question regarding why do we hire you?
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Q1. Self introduction why you want to join housing.com Knowledge about verticle of REA india
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Round duration - 60 minutes
Round difficulty - Easy

Be prepared for JavaScript and web fundamentals . I have given most of the answer including DS question and interviewer is also very good , explained every answer which i don't know.

Q1. 
Pair Sum Problem Statement
You are given an integer array 'ARR' of size 'N' and an integer 'S'. Your task is to find and return a list of all pairs of elements where each sum of a pair equals 'S'.
Note:
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Ans. 
Find pairs of elements in an array that sum up to a given value, sorted in a specific order.
• Iterate through the array and use a hashmap to store the difference between the target sum and each element.

• Check if the difference exists in the hashmap, if so, add the pair to the result list.

• Sort the result list based on the criteria mentioned in the question.

• Return the sorted list of pairs.
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Q2. What are closures in JavaScript?
Ans. 
Closures in JavaScript are functions that have access to variables from their outer scope even after the outer function has finished executing.
• Closures allow functions to access variables from their parent function's scope

• They are created whenever a function is defined within another function

• Closures can be used to create private variables and functions in JavaScript
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Q3. Can you write a polyfill for event delegation in JavaScript?
Ans. 
Yes, event delegation can be achieved by attaching an event listener to a parent element and then checking the target element of the event.
• Attach an event listener to a parent element that contains the child elements you want to delegate events to.

• Check the target element of the event to determine if it matches the desired child element.

• Perform the appropriate action based on the target element.
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Q4. Can you explain the concepts of deep and shallow copy in JavaScript with examples?
Ans. 
Deep copy creates a new copy of an object/array with all nested values copied, while shallow copy creates a new object/array with references to the original nested values.
• Deep copy creates a completely new copy of an object/array, including all nested values, while shallow copy only creates a new object/array with references to the original nested values.

• In JavaScript, deep copy can be achieved using methods like JSON....read more
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Round duration - 60 minutes
Round difficulty - Easy

Technical Interview round with questions based on CSS and Web basics.

Q1. What is the difference between absolute and fixed positioning in CSS?
Ans. 
Absolute positioning is relative to the nearest positioned ancestor, while fixed positioning is relative to the viewport.
• Absolute positioning is relative to the nearest positioned ancestor.

• Fixed positioning is relative to the viewport.

• Absolute positioned elements are removed from the normal document flow.

• Fixed positioned elements stay in the same position even when the page is scrolled.
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Q2. How does a browser render a webpage?
Ans. 
A browser renders a webpage by parsing HTML, CSS, and JavaScript, constructing the DOM tree, rendering the layout, and painting the pixels on the screen.
• Browser requests the HTML file from the server

• Browser parses the HTML and constructs the DOM tree

• Browser fetches external resources like CSS and JavaScript files

• Browser applies CSS styles to the DOM elements and constructs the render tree

• Browser executes JavaScript cod...read more
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Q3. What is webpack?
Ans. 
Webpack is a module bundler for JavaScript applications.
• Webpack takes modules with dependencies and generates static assets representing those modules.

• It can handle various types of assets like JavaScript, CSS, and images.

• Webpack allows for code splitting, lazy loading, and hot module replacement.

• Common configuration options include entry, output, loaders, and plugins.
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Round duration - 30 minutes
Round difficulty - Easy

HR round with typical behavioral problems.