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Lenskart SDE-2 Interview Questions and Answers
Lenskart SDE-2 Interview Experiences
1 interview found
Anonymous
I appeared for an interview in Mar 2022.
(1 Question)
Round duration - 60 minutes
Round difficulty - Medium
1 Medium/Easy DSA questions were asked similar to Leetcode.
I was expected to come up with the most optimal solution for the same. I completed the code and explained in 45 mins.
In the remaining time, I was asked questions from Computer Science fundamentals and Java
- Q1.
Unique Element In Sorted Array
Nobita wants to impress Shizuka by correctly guessing her lucky number. Shizuka provides a sorted list where every number appears twice, except for her lucky number, which a...
- Ans.
Find the unique element in a sorted array where all other elements appear twice.
Use XOR operation to find the unique element in the sorted array.
Iterate through the array and XOR all elements, the result will be the unique element.
Time complexity of O(n) can be achieved by iterating through the array once.
(1 Question)
Round duration - 60 minutes
Round difficulty - Easy
Low-level system design round.
Expected to come up with a running code.
- Q1.
LRU Cache Implementation Problem
Design and implement a Least Recently Used (LRU) cache data structure. This cache must support the following operations efficiently:
get(key): Return the value associate...
- Ans.
Implement a Least Recently Used (LRU) cache data structure that supports get and put operations efficiently.
Design a data structure that maintains a cache with a specified capacity.
Implement get(key) function to return value associated with key or -1 if key doesn't exist.
Implement put(key, value) function to insert/update key-value pair in cache.
Invalidate least recently used item when cache reaches its capacity.
Handle...
(1 Question)
Round duration - 30 minutes
Round difficulty - Easy
Standard behavioural questions by HR
- Q1. Can you describe your past work experiences and projects from your previous company?
Interview Preparation Tips
Tip 1 : Break down the total topics based on your comfort and ease and try and master one topic at a time
Tip 2 : Try and up solve
Tip 3 : Always try and come up with multiple solutions for a DSA question starting from brute force to optimal solution.
Tip 1 : Try to keep it short and crisp.
Tip 2 : Always make the entries chronological with the most recent experiences coming first followed by past experiences.
Skills evaluated in this interview
Top trending discussions
Interview questions from similar companies
I appeared for an interview before Sep 2020.
(1 Question)
Round duration - 1hour
Round difficulty - Hard
- Q1.
Snake and Ladder Problem Statement
Given a 'Snake and Ladder' board with N rows and N columns, where positions are numbered from 1 to (N*N) starting from the bottom left, alternating direction each row, f...
- Ans.
Find the minimum number of dice throws required to reach the last cell on a 'Snake and Ladder' board.
Use Breadth First Search (BFS) algorithm to find the shortest path from start to end cell.
Keep track of visited cells and the number of dice throws required to reach each cell.
Consider the presence of snakes and ladders while calculating the next possible moves.
Return the minimum number of dice throws to reach the last ...
(1 Question)
Round duration - 1hour
Round difficulty - Hard
- Q1. Stack using queue
Mvvm architecture
- Ans.
Implement a stack using a queue in MVVM architecture
Use two queues to simulate a stack
Push operation: Enqueue the element to queue 1
Pop operation: Dequeue all elements from queue 1 to queue 2, dequeue the last element from queue 2 (which is the top of the stack)
Ensure proper synchronization between the two queues
Example: Push(1), Push(2), Pop() should return 2
Round duration - 1hour
Round difficulty - Easy
Interview Preparation Tips
Tip 1 : be confident
Tip 2 : always say truth about your experience
Tip 3 : don't be nervous
Tip 1 : mentioned project u worked on
Tip 2 : technical skills
Skills evaluated in this interview
I applied via LinkedIn and was interviewed in Jun 2024. There was 1 interview round.
(2 Questions)
- Q1. Minimum cost to connect the ropes
- Ans.
The minimum cost to connect the ropes is calculated by repeatedly connecting the two smallest ropes until all ropes are connected.
Sort the ropes in ascending order.
Repeatedly connect the two smallest ropes.
Add the cost of connecting the two ropes to the total cost.
Continue this process until all ropes are connected.
- Q2. Max value of arr[i]+arr[j]+i-j
- Ans.
The question asks for the maximum value of arr[i]+arr[j]+i-j for given array arr.
Iterate through all possible pairs of i and j in the array
Calculate the value of arr[i]+arr[j]+i-j for each pair
Keep track of the maximum value found
Skills evaluated in this interview
(2 Questions)
- Q1. Map based easy question
- Q2. Priority based heap question
Shubham Jain
Selected
I applied via Recruitment Consulltant and was interviewed in Aug 2022. There were 5 interview rounds.
2 Coding questions both easy-medium level.
1. Based on the Sliding Window
2. Graph Question
A simple feed platform, which supports some basic functionality. The main point of this round was to see how well a candidate architect the application.
(4 Questions)
- Q1. Basic discussion around the project & past experience.
- Q2. Design a 2/3rd Winning game.
- Q3. Discussion around how would you scale a application.
- Ans.
Scaling an application involves optimizing performance, managing load, and ensuring reliability as user demand increases.
Horizontal scaling: Add more machines to distribute load (e.g., using load balancers).
Vertical scaling: Upgrade existing machines with more resources (CPU, RAM).
Database sharding: Split databases into smaller, more manageable pieces to improve performance.
Caching strategies: Use caching layers (e.g.,...
- Q4. NoSQL vs SQL difference
(3 Questions)
- Q1. Hiring Manager round
- Q2. Basic discussions around past work, past processes, what are your future aspirations etc.
- Q3. This round was mainly for seeing the culture fitment of a candidate.
Interview Preparation Tips
- Data Structures
- Algorithms
- System Design
- Microservices
- Java
- Spring Boot
Along with that, you should be well-versed in System design concepts.
Skills evaluated in this interview
I applied via LinkedIn and was interviewed in Apr 2024. There was 1 interview round.
That is machine coding round, where one problem will be given and you have to implement proper functionality with correct test cases.
I appeared for an interview in May 2021.
Round duration - 120 minutes
Round difficulty - Medium
it was morning 10AM-12
friendly environment given by the interviewer
It was machine coding round, the problem statement was to create a online food ordering system with various features.
interviewer was good and supportive
(2 Questions)
Round duration - 60 Minutes
Round difficulty - Medium
timing noon 3-4Pm
good interviewer
interviwer was giving hints if required and all
- Q1.
Problem: Sort an Array of 0s, 1s, and 2s
Given an array/list
ARRconsisting of integers where each element is either 0, 1, or 2, your task is to sort this array in increasing order.Input:
The input sta...
- Ans.
Sort an array of 0s, 1s, and 2s in increasing order.
Use a three-pointer approach to sort the array in a single pass.
Initialize three pointers for 0, 1, and 2 values and iterate through the array.
Swap elements based on the values encountered to achieve the sorted array.
Example: Input array [0, 2, 1, 1] should be sorted as [0, 1, 1, 2].
- Q2.
Maximum Path Sum Problem Statement
You are given an n-ary tree consisting of 'N' nodes. Your task is to determine the maximum sum of the path from the root to any leaf node.
Example:
Input:
For the giv...
- Ans.
Find the maximum sum of the path from the root to any leaf node in an n-ary tree.
Traverse the tree from root to leaf nodes, keeping track of the sum along the path.
At each node, calculate the sum of the path from the root to that node and update the maximum sum found so far.
Consider using depth-first search (DFS) to traverse the tree efficiently.
Handle cases where nodes are absent (-1) by appropriately updating the pat...
(1 Question)
Round duration - 90 Minutes
Round difficulty - Easy
evening 4-5:30PM
interviewer was good
very supportive and giving hints
- Q1. Design a system for BookMyShow to allow users to book movie tickets.
- Ans.
Design a system for BookMyShow to allow users to book movie tickets.
Create a user-friendly website and mobile app for users to browse movies and showtimes.
Implement a secure payment gateway for users to purchase tickets online.
Develop a database to store movie information, showtimes, and user bookings.
Include features like seat selection, ticket confirmation, and booking history for users.
Integrate with cinema partners...
(2 Questions)
Round duration - 40 Minutes
Round difficulty - Easy
4-5 PM
Interviewer was good
- Q1. Why should we hire you?
- Q2. Why are you considering a switch in your job?
- Ans.
I'm seeking new challenges and opportunities for growth that align with my career goals and aspirations.
Desire for professional growth: I'm looking for a role that offers more responsibilities and opportunities to lead projects.
Interest in new technologies: I want to work with cutting-edge technologies that can enhance my skills and knowledge.
Cultural fit: I'm seeking a company culture that aligns more closely with my ...
Interview Preparation Tips
Tip 1 : Practice Atleast 200 Questions
Tip 2 : Practice company specific interview question
Tip 3 : Prepare resume nicely
Tip 1 : Prepare resume very nicely.
Tip 2 : don't mention any tech stack you are confident of.
Skills evaluated in this interview
ankur kumar
I applied via Referral and was interviewed in Jan 2023. There were 3 interview rounds.
This was a machine coding round in which we have to implement an online cab booking service.
Standard problem solving round consists of two questions on tree and dp.
Interview Preparation Tips
I applied via Referral and was interviewed in May 2017. There were 4 interview rounds.
Interview Questionnaire
2 Questions
- Q1. What Is job timing
- Ans.
Job timing refers to the specific hours and schedule an employee is expected to work.
Job timing can vary by industry; for example, retail jobs may require evening and weekend shifts.
In corporate settings, standard job timing is often 9 AM to 5 PM, Monday to Friday.
Flexible job timing allows employees to choose their hours, promoting work-life balance.
Some jobs, like healthcare, may require shift work, including nights ...
- Q2. What is salray cycl
- Ans.
Salary cycle refers to the frequency at which employees are paid, such as weekly, bi-weekly, or monthly.
Salary cycle can vary depending on the company's policies and practices.
Common salary cycles include weekly, bi-weekly (every two weeks), semi-monthly (twice a month), and monthly.
Some companies may also offer different salary cycles for different employee groups, such as hourly vs. salaried employees.
Understanding t...
Interview Preparation Tips
Experience: I do have 5yrs exp in sales i used to worked with many big company
General Tips: I gave interview coz of my skill as per my skill i got selected
Skills: Gd&t Symbols, Sales, Communication, Body Language, Problem Solving, Leadership, Presentation Skills, Time Management, Decision Making Skills
Duration: <1 week
I applied via Referral and was interviewed before Mar 2017. There were 6 interview rounds.
Interview Questionnaire
2 Questions
- Q1. Interview taken by hr
- Q2. Myself, previous company, Experience
Interview Preparation Tips
Experience: Aptitude test
Round: Resume Shortlist
Experience: I had given interview infront of Naveen Kumar Gagwani.
He short listed my cv
Round: Case Study Interview
Experience: The interviewer asked me
Can you sell me a mobile
And I sold him.
General Tips: It's has a selection procedure.
You can attend interview with good level of confidence.
Skills: MARKETING APTITUDE, Marketing, Communication, Body Language, Problem Solving, Analytical Skills, Presentation Skills
Duration: <1 week
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