Groww Software Developer II Interview Questions and Answers

Q1. What is the difference between normal and arrow functions
Ans. 
Arrow functions are more concise and have a lexical 'this' binding compared to normal functions.
• Arrow functions do not have their own 'this' keyword, they inherit it from the parent scope.

• Arrow functions do not have their own 'arguments' object.

• Arrow functions cannot be used as constructors with 'new'.

• Arrow functions are more concise and have implicit return when no curly braces are used.
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Q2. All basic JS Questions to cover Hoisting closure
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Q3. They asked to show me an example using the API call
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Q4. Difference between forEach and Map
Ans. 
forEach is used to iterate over an array and perform a function on each element, while map creates a new array by applying a function to each element.
• forEach does not return a new array, while map does

• forEach does not modify the original array, while map creates a new array

• forEach is used for side effects, while map is used for transformation

• Example: forEach - array.forEach(item => console.log(item)), map - const newAr
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1 hour 10 mins, MERN Stack, Face to Face. Mongodb, medium DSA Question, callback, eventloop, NodeJS asynchronous working

Q1. Method override
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Q2. Inversion of control
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Q1. About your self
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Q1. LLD: Design Google Calendar
Ans. 
Design Google Calendar for scheduling events and appointments
• Use a clean and user-friendly interface for easy navigation

• Implement features like creating events, setting reminders, and sharing calendars

• Include options for recurring events and color-coding for organization
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Q2. Coding: Take Home Assignment
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Q3. HLD: System Design, Projects
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Leet code problem. Sliding window

Q1. Design related like book my show
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Q2. Database design questions related to concurrency
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Q1. Tell me your project details
Ans. 
Developed a web application for online shopping with user authentication and payment gateway integration.
• Used React.js for front-end development

• Implemented user authentication using JWT tokens

• Integrated Stripe API for payment processing
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Q1. Oops concepts explained
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Q1. Optimization Techniques
Ans. 
Optimization techniques are methods used to improve the efficiency and performance of software applications.
• Use of algorithms like dynamic programming and greedy algorithms

• Profiling and performance tuning to identify bottlenecks

• Code refactoring to improve readability and maintainability

• Utilizing caching and memoization for faster access to data

• Parallel processing and multi-threading for improved concurrency
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Q1. Quant,Verbal,CS Domain
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Q2. 2 coding questions
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Q1. Ask about projects and real world thinking about projects
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Q2. Some basic data preprocessing part of my project.
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