Mid Full-stack at Lenskart

Full-stackMidOffer◆ Commonly asked· 2023

Mid fullstack interview. Coding-heavy early, design and behavioral later.

The loop · 5 rounds

Round 01 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

Binary tree maximum path sum.
MidHard◆ Commonly asked
#tree#dfs
PracticeLeetCode GeeksforGeeks
Longest consecutive sequence.
MidMedium◆ Commonly asked
#hashmap#array
PracticeLeetCode GeeksforGeeks
Coin change — fewest coins to make an amount.
MidMedium◆ Commonly asked
#dp
PracticeLeetCode GeeksforGeeks

Round 02 · 2 questions

Machine Coding

Build a working component or service under time pressure.

Implement a bulk-upsert endpoint with validation.
MidMedium◆ Commonly asked
#api#validation
PracticeGeeksforGeeks Search
Build a key-value store with TTL expiry.
MidMedium◆ Commonly asked
#cache#ttl
PracticeGeeksforGeeks Search

Round 03 · 1 question

Low-Level Design

Object-oriented / low-level design of a focused module.

Design classes for a parking lot.
MidMedium◆ Commonly asked
#oop#design-patterns
PracticeGeeksforGeeks Search

Round 04 · 3 questions

Tech Deep-Dive

Deep questions on your core stack and fundamentals.

How does a bloom filter work and when would you use one?
MidMedium◆ Commonly asked
#data-structures#probabilistic
PracticeGeeksforGeeks Search
Explain the difference between horizontal and vertical scaling.
MidEasy◆ Commonly asked
#scale
PracticeGeeksforGeeks Search
Explain how you handle concurrency / race conditions.
MidHard◆ Commonly asked
#concurrency
PracticeGeeksforGeeks Search

Round 05 · 2 questions

Behavioral / HR

Values, collaboration, and past-experience (STAR) questions.

Tell me about the hardest bug you have debugged.
Mid◆ Commonly asked
#debugging#star
Describe a time you disagreed with a teammate. How did it resolve?
Mid◆ Commonly asked
#conflict#star

◆ This experience is composed from commonly reported questions for this role and level. Real, individually-shared interviews will be layered in over time.