Tech Mahindra

Multinational IT services and consulting company.

4 Rounds ~21 Days Medium

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The Interview Loop

Recruiter Screen (30 min)

Standard fit check, behavioral questions, and resume overview.

Technical Loop (3-4 Rounds)

Deep dive into domain knowledge, coding, and system design.

Interview Question Bank

All Roles Cloud Engineer 35 Data Engineer 35 Data Scientist 35 DevOps Engineer 35 Frontend Engineer 35 Full Stack Engineer 35 Machine Learning Engineer 35 Product Manager 35 Software Engineer 35

All Topics JavaScript 6 React 6 Algorithms 5 System Design 4 Web Fundamentals 3 Angular 3 CSS 2 Work Ethic 1

Frontend Engineer • Behavioral • medium

Tell me about a time when a client requested a major feature change in the middle of a sprint. How did you handle it?

#Agile #Communication #Scope Creep

Practice

Frontend Engineer • Behavioral • medium

Describe a situation where you disagreed with a backend developer regarding an API contract. How was it resolved?

#Conflict Resolution #API Design #Collaboration

Practice

Frontend Engineer • Behavioral • medium

Tell me about a time you had to deliver a critical feature under a very tight deadline. Did you compromise on code quality?

#Time Management #Prioritization #Quality Assurance

Practice

Frontend Engineer • Behavioral • medium

Describe a time when a bug you introduced made it to production. How did you troubleshoot and resolve it?

#Debugging #Accountability #Incident Management

Practice

Frontend Engineer • Behavioral • easy

How do you ensure you are aligned with your team's goals during an Agile sprint? Describe your participation in Agile ceremonies.

#Agile #Scrum #Team Collaboration

Practice

Frontend Engineer • Coding • medium

Write a function to flatten a deeply nested object into a single-level object with dot-separated keys.

#Recursion #Object Manipulation #Data Structures

Practice

Frontend Engineer • Coding • medium

Write a debounce function from scratch. How would you apply this to a search input field in a telecom billing portal to minimize API calls?

#Closures #Timers #Performance Optimization

Practice

Frontend Engineer • Coding • hard

Implement a polyfill for Promise.all().

#Promises #Polyfills #Asynchronous JS

Practice

Frontend Engineer • Coding • medium

Write a custom React hook `useFetch` that takes a URL and returns the data, loading state, and error state.

#Custom Hooks #API Integration #State Management

Practice

Frontend Engineer • Coding • easy

Write a function to check if two strings are anagrams of each other.

#Strings #Hash Maps #Sorting

Practice

Frontend Engineer • Coding • medium

Write a function that splits an array into chunks of a specified size.

#Arrays #Data Manipulation

Practice

Frontend Engineer • Coding • medium

Write a function to deep clone a JavaScript object without using JSON.parse(JSON.stringify()).

#Recursion #Object Manipulation #Memory References

Practice

Frontend Engineer • Coding • hard

Implement a simple EventEmitter class in JavaScript with 'on', 'emit', and 'off' methods.

#Design Patterns #Observer Pattern #Classes

Practice

Frontend Engineer • System Design • hard

Design the frontend architecture for a large-scale telecom customer portal. How would you handle state management, routing, and performance?

#Architecture #State Management #Performance #Scalability

Practice

Frontend Engineer • System Design • hard

Tech Mahindra is modernizing a legacy monolithic application. How would you design a Micro-frontends architecture to allow gradual migration?

#Micro-frontends #Module Federation #Legacy Migration

Practice

Frontend Engineer • System Design • hard

Design a real-time notification system for a web application. How do you choose between WebSockets, Server-Sent Events (SSE), and Long Polling?

#Real-time #WebSockets #SSE #Network Protocols

Practice

Frontend Engineer • System Design • medium

Design the state structure for an e-commerce shopping cart. How do you handle offline support and syncing when the user comes back online?

#State Management #Offline Storage #Syncing

Practice

Frontend Engineer • Technical • medium

Explain the JavaScript Event Loop. How does it handle synchronous code, microtasks (like Promises), and macrotasks (like setTimeout)?

#Event Loop #Asynchronous JS #Concurrency

Practice

Frontend Engineer • Technical • medium

How does React's Virtual DOM work, and what is the Reconciliation process?

#Virtual DOM #Reconciliation #Diffing Algorithm

Practice

Frontend Engineer • Technical • medium

In a React application, how do you prevent memory leaks when a component unmounts while an asynchronous operation (like an API call) is still pending?

#Hooks #useEffect #Memory Management

Practice

Frontend Engineer • Technical • easy

For a complex enterprise dashboard layout, when would you choose CSS Grid over Flexbox, and vice versa?

#CSS Grid #Flexbox #Layout

Practice

Frontend Engineer • Technical • medium

In Angular, what is the difference between a Subject and a BehaviorSubject in RxJS? When would you use each?

#RxJS #Observables #State Management

Practice

Frontend Engineer • Technical • medium

Compare the Context API and Redux. For a large-scale Tech Mahindra enterprise application, which would you choose and why?

#State Management #Redux #Context API

Practice

Frontend Engineer • Technical • medium

You are integrating a third-party API for a client and encountering CORS errors. What is CORS, and how do you resolve it from the frontend and backend perspectives?

#CORS #Security #HTTP

Practice

Frontend Engineer • Technical • medium

Explain closures in JavaScript. Can you provide an example of a common bug caused by closures inside a loop, and how to fix it?

#Closures #Scope #Var vs Let

Practice

Frontend Engineer • Technical • easy

What is CSS Specificity? How does the BEM (Block Element Modifier) methodology help in managing CSS in large projects?

#CSS Specificity #BEM #Maintainability

Practice

Frontend Engineer • Technical • hard

How would you optimize the Webpack configuration for a React application to reduce the final bundle size?

#Webpack #Code Splitting #Tree Shaking

Practice

Frontend Engineer • Technical • hard

Explain Angular's Change Detection mechanism. What is OnPush strategy and when should it be used?

#Change Detection #Performance #Zone.js

Practice

Frontend Engineer • Technical • easy

What is the difference between call(), apply(), and bind() in JavaScript?

#Functions #Context #This Keyword

Practice

Frontend Engineer • Technical • medium

Why is Web Accessibility (a11y) important? What are some key ARIA attributes and semantic HTML tags you use daily?

#Accessibility #HTML5 #ARIA

Practice

Frontend Engineer • Technical • medium

In React, what is the difference between useMemo and useCallback? Provide a scenario where misusing them degrades performance.

#Hooks #Performance Optimization #Memoization

Practice

Frontend Engineer • Technical • medium

Explain Prototypal Inheritance in JavaScript. How does the prototype chain work when looking up a property?

#Prototypes #Inheritance #Object Oriented JS

Practice

Frontend Engineer • Technical • medium

How do you use HTTP Interceptors in Angular? Give an example of how you would use one to handle authentication tokens.

#Interceptors #Authentication #HTTP Client

Practice

Frontend Engineer • Technical • medium

What are the security implications of storing JWT tokens in LocalStorage vs HttpOnly Cookies?

#Security #JWT #XSS #CSRF

Practice

Frontend Engineer • Technical • easy

What are Error Boundaries in React? How do you implement them, and what types of errors do they NOT catch?

#Error Handling #Component Lifecycle

Practice

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Senior Engineer

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