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LambdaTest Software Developer Interview Questions and Answers

Updated 4 Nov 2024

LambdaTest Software Developer Interview Experiences

1 interview found

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Question around priority queue
  • Q2. Decode strings leetcode
Round 2 - Technical 

(1 Question)

  • Q1. System design questions scenario based
Round 3 - Technical 

(1 Question)

  • Q1. Questions on multidimensional tree

Interview questions from similar companies

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
-

I applied via Campus Placement and was interviewed in Mar 2024. There was 1 interview round.

Round 1 - Coding Test 

There were 5 question out of which 2 were coding Data Structure problems , 1 was SQL based , 1 was AI based Problem ( Machine Learning ) and 1 was to create UML Diagram.
First Coding question was pretty easy , other one was kinda tough , UML Diagram was also easy and SQL query was of moderate level.

Interview Preparation Tips

Interview preparation tips for other job seekers - Keep Practising u'll definately make it.
Interview experience
3
Average
Difficulty level
Hard
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Campus Placement and was interviewed in Sep 2023. There were 4 interview rounds.

Round 1 - Aptitude Test 

Aptitude test was of 1 hr

Round 2 - Coding Test 

It was about 1 hr duration

Round 3 - Technical 

(2 Questions)

  • Q1. What do you know about oops
  • Ans. 

    Object-oriented programming paradigm focusing on objects and classes

    • Encapsulation: Bundling data and methods that operate on the data into a single unit (object)

    • Inheritance: Ability of a class to inherit properties and behavior from another class

    • Polymorphism: Ability to present the same interface for different data types

    • Abstraction: Hiding the complex implementation details and showing only the necessary features

  • Answered by AI
  • Q2. Tell me about encapsulation
  • Ans. 

    Encapsulation is the concept of bundling data and methods that operate on the data into a single unit.

    • Encapsulation helps in hiding the internal state of an object and restricting access to it.

    • It allows for better control over the data by preventing outside interference.

    • Encapsulation also promotes code reusability and modularity.

    • Example: In object-oriented programming, classes encapsulate data fields and methods to ope

  • Answered by AI
Round 4 - HR 

(2 Questions)

  • Q1. How do you manage your team
  • Q2. Why should I hire you

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Coding Test 

2 Query question and 3 coding questions

Round 2 - Technical 

(4 Questions)

  • Q1. Basic oops , Java script and Networking questions.
  • Q2. What is object orienteered programming.
  • Ans. 

    Object oriented programming is a programming paradigm based on the concept of objects, which can contain data and code.

    • Objects are instances of classes, which define the structure and behavior of the objects.

    • Encapsulation, inheritance, and polymorphism are key principles of object oriented programming.

    • Example: Java, C++, Python are popular languages that support object oriented programming.

  • Answered by AI
  • Q3. Different Events in java script
  • Ans. 

    Events in JavaScript are actions or occurrences that happen in the browser that the code can respond to.

    • Events can be triggered by user actions (like clicking a button), browser actions (like page load), or system events (like a timer expiring)

    • Event listeners are used to listen for and respond to events

    • Common events include click, mouseover, keydown, submit, etc.

  • Answered by AI
  • Q4. Event listeners
Round 3 - Coding Test 

Project , coding question, DBMS

Round 4 - HR 

(1 Question)

  • Q1. Basic personal details

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Coding Test 

2 DSA questions Both are from DP

Round 2 - Technical 

(2 Questions)

  • Q1. 2 Questions , 1 is DSA
  • Q2. Second question is Puzzle

Interview Preparation Tips

Interview preparation tips for other job seekers - Practise DSA more and give more and more interviews.
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Job Fair and was interviewed in May 2024. There was 1 interview round.

Round 1 - Coding Test 

Questions trees and graphs.

Interview Preparation Tips

Interview preparation tips for other job seekers - Be focused, motivated, and have faith
Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - One-on-one 

(3 Questions)

  • Q1. Resume based questions
  • Q2. Event loop in nodejs
  • Ans. 

    Event loop in Node.js manages asynchronous operations by executing callback functions when certain events occur.

    • Event loop is responsible for handling I/O operations, timers, and callbacks in Node.js

    • It allows Node.js to perform non-blocking operations efficiently

    • Event loop continuously checks the event queue for new events to execute

  • Answered by AI
  • Q3. Javascript es6 questions

Skills evaluated in this interview

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Referral and was interviewed in Oct 2024. There was 1 interview round.

Round 1 - Technical 

(1 Question)

  • Q1. Promises in javascript
  • Ans. 

    Promises in JavaScript are objects representing the eventual completion or failure of an asynchronous operation.

    • Promises are used to handle asynchronous operations in JavaScript.

    • They can be in one of three states: pending, fulfilled, or rejected.

    • Promises can be chained using .then() to handle success and .catch() to handle errors.

  • Answered by AI

Skills evaluated in this interview

I appeared for an interview in Jun 2021.

Round 1 - Coding Test 

(1 Question)

Round duration - 180 minutes
Round difficulty - Hard

The test link had 3 days expiry so I could attempt test anytime. It was conducted on doselect.com

  • Q1. 

    Equilibrium Indices in a Sequence

    You are given an array/list named 'SEQUENCE', which consists of 'N' integers. The task is to identify all equilibrium indices in this sequence.

    Explanation:

    An equilibr...

  • Ans. 

    The task is to find the equilibrium indices of a given sequence, where the sum of elements at lower indices is equal to the sum of elements at higher indices.

    • Iterate through the sequence and calculate the total sum of all elements

    • Initialize a left sum and right sum as 0

    • For each index, update the left sum and right sum and check if they are equal

    • If they are equal, add the index to the equilibrium indices

    • Return the equil

  • Answered by AI
Round 2 - Video Call 

(1 Question)

Round duration - 60 minutes
Round difficulty - Medium

Video interview round wherein I was asked to wrote code for the problem statements given by the interviewer. The problems were mainly focused on advanced JS concepts like asynchonous progamming, timers, closures, and data structure problems around arrays, sets, linked list etc.

  • Q1. 

    Rearrange Linked List Problem Statement

    Given a singly linked list in the form 'L1' -> 'L2' -> 'L3' -> ... 'Ln', your task is to rearrange the nodes to the form 'L1' -> 'Ln' -> 'L2' -> '...

  • Ans. 

    The task is to rearrange the nodes of a singly linked list in a specific order without altering the data of the nodes.

    • Iterate through the linked list to find the middle node using the slow and fast pointer technique.

    • Reverse the second half of the linked list.

    • Merge the first and reversed second half of the linked list alternatively to get the desired order.

  • Answered by AI
Round 3 - HR 

Round duration - 30 minutes
Round difficulty - Easy

This was the last round with HR wherein they judged cultural fit and there was discussion on things like my expectations v/s their expectations etc.

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 1 in BangaloreEligibility criteriaNoSpringworks interview preparation:Topics to prepare for the interview - Javascript/Typescript, NodeJS, MongoDB, SQL, Angular, Data Structures and Algorithms, Object Oriented Programming ConceptsTime required to prepare for the interview - 3 MonthsInterview preparation tips for other job seekers

Tip 1 : Get well versed with the fundamentals of Javascript including advanced concepts like promises, async/await, generators, higher order functions, closures, currying etc.
Tip 2 : Do some projects on MERN Stack because a lot of projects here use some or all of those technologies
Tip 3 : Do prepare for behavioral/cultural-fit questions especially around how you'll handle various stituations during work or how will you manage productivity while working remotely.

Application resume tips for other job seekers

Tip 1 : Having projects on MERN stack will give you advantage
Tip 2 : Do mention if you have any AWS experience.
Tip 3 : Mention all your internships/past experiences. Keep them crisp and talk about what you did and it's impact/outcome.
Tip 4 : Any experience/exposure to blockchain will definitely give brownie points.

Final outcome of the interviewSelected

Skills evaluated in this interview

I appeared for an interview in Nov 2021.

Round 1 - Coding Test 

Round duration - 30 minutes
Round difficulty - Easy

This round mainly consisted of some questions on advanced JS topics like Execution Context, Callback queue, Micro task queue, Promises, etc.

Round 2 - Telephonic Call 

(1 Question)

Round duration - 60 minutes
Round difficulty - Medium

This round was more technical compared to the previous one. The interviewer was a senior developer. If questions were not answered, answers would be given/explained.

  • Q1. What are some aggregate operators in MongoDB?
  • Ans. 

    Aggregate operators in MongoDB are used for data aggregation and manipulation.

    • Some aggregate operators in MongoDB include $sum, $avg, $min, $max, $push, $addToSet, $first, $last, $project, $match, $group, $sort, $limit, $skip.

    • Example: db.collection.aggregate([{$group: {_id: '$field', total: {$sum: '$value'}}}])

  • Answered by AI
Round 3 - HR 

Round duration - 30 minutes
Round difficulty - Easy

This round was mainly to assess my experience level, roles, and responsibilities from my previous company. Salary negotiations also happened here.

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 1 in BangaloreEligibility criteriaNo criteriaSpringworks interview preparation:Topics to prepare for the interview - Databases, Asynchronous programming, Promises, JavaScript, DS.Time required to prepare for the interview - 1 monthInterview preparation tips for other job seekers

Tip 1 : Learn about Execution Context, Promises in JS
Tip 2 : Learn about indices, Difference between different databases
Tip 3 : Error handling and Exceptions

Application resume tips for other job seekers

Tip 1 : Put in what you’ve done and not what you could have done.
Tip 2 : Keep it short and simple

Final outcome of the interviewSelected

Skills evaluated in this interview

LambdaTest Interview FAQs

How many rounds are there in LambdaTest Software Developer interview?
LambdaTest interview process usually has 3 rounds. The most common rounds in the LambdaTest interview process are Technical.
What are the top questions asked in LambdaTest Software Developer interview?

Some of the top questions asked at the LambdaTest Software Developer interview -

  1. system design questions scenario ba...read more
  2. questions on multidimensional t...read more
  3. Decode strings leetc...read more

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LambdaTest Software Developer Interview Process

based on 1 interview

Interview experience

5
  
Excellent
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LambdaTest Software Developer Salary
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₹10 L/yr - ₹30 L/yr
166% more than the average Software Developer Salary in India
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