11 questions · from 3 interviews
Dunzo interview questions
Every question candidates reported from their Dunzo interviews, most frequently asked first. Each links to the write-up it came from, so you can see the round and how it went.
Dunzo coding and DSA questions
- 01
Perfect Squares
Given an integer n, return the least number of perfect square numbers that sum to n. A perfect square is an integer that is the square of an integer; for example, 1, 4, 9, and 16 are perfect squares. while 3 and 11 are not.
Medium · From Dunzo | SWE- II | Bangalore | Jun 2022 [Rejected]
- 02
Nearest Exit from Entrance in Maze
You are given an m x n matrix maze (0-indexed) with empty cells ('.') and walls ('+'). You are also given the entrance of the maze, where entrance = [entrancerow, entrancecol] denotes the row and column of the cell you are currently in. You want to find the…
Medium · From Dunzo | SWE- II | Bangalore | Jun 2022 [Rejected]
- 03
Longest Palindromic Subsequence
Given a string s, find the length of the longest palindromic subsequence within it. A subsequence is a sequence that can be derived from another sequence by deleting some or no elements without changing the order of the remaining elements.
Medium · From Dunzo | Software Developer | Bengaluru India Interview Experience
- 04
Multicache Implementation with Synchronization
Implement a multicache system and explain your approach to handling concurrency and synchronization challenges within this caching mechanism. Discuss potential issues like cache coherence and how to ensure data integrity across multiple threads or processes…
From Dunzo | Software Developer | Bengaluru India Interview Experience
- 05
Inversion Count using Merge Sort
Given an array of integers, write a function to find the total number of inversions in the array using the merge sort algorithm. An inversion is a pair of indices (i, j) such that i arr[j].
Hard · From Dunzo | Software Developer | Bengaluru India Interview Experience
- 06
Number of Islands
You are given an m x n 2D binary grid which represents a map of '1's (land) and '0's (water). An island is surrounded by water and is formed by connecting adjacent lands horizontally or vertically. You may assume all four edges of the grid are all surrounded…
Medium · From Dunzo | Software Developer | Bengaluru India Interview Experience
- 07
Number of Subarrays with M Odd Numbers
Given an array of integers nums and an integer k , return the number of 'good' subarrays. A 'good' subarray is one that contains exactly k odd numbers.
Medium · From Dunzo | Software Developer | Bengaluru India Interview Experience
Dunzo system design questions
- 01
System Design: Instagram
Design the Low-Level Design (LLD) and High-Level Design (HLD) for Instagram, including UML diagrams.
- 02
Design an Image Uploading Library
The task involved designing an image uploading library, focusing on its internal architecture and components.
Hard · From Dunzo | Android | SDE-2
- 03
Design Facebook Homepage
Design the system architecture for the Facebook homepage. Consider core features like the news feed, user profiles, notifications, friend suggestions, and key design considerations such as scalability, latency, data consistency, and reliability. Discuss the…
Hard · From Dunzo | Software Developer | Bengaluru India Interview Experience
Dunzo other questions
- 01
UI Screen Development with Architecture Focus
I was tasked with developing a simple UI screen based on a provided visual design and JSON data. The primary evaluation criteria were around the architectural choices made. The completed project had to be submitted.
Dunzo interview questions FAQ
What questions are asked in Dunzo interviews?
Candidates reported 11 distinct questions across 3 Dunzo interviews. 7 coding and DSA questions, 3 system design questions, 1 other questions.
How difficult are Dunzo interview questions?
Of the questions candidates rated, 0% were easy, 63% medium and 38% hard.