'Coding has over 700 languages', '67% of programming jobs aren’t in the technology industry', 'Coding is behind almost everything that is powered by electricity'
OYO interview experience Real time questions & tips from candidates to crack your interview
SDE - 1
OYO
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3 rounds | 6 Coding problems
Interview preparation journey
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Preparation
Duration: 2 months
Topics: Data Structures, OS, DBMS, Algorithms, Networking, Coding, OOP
Tip
Tip

Tip 1 : Strengthen your coding, algorithms. This is one most important thing for OYO. Practice Graph, tree, DP, greedy, recursion, data structures questions.
Tip 2 : OS, DBMS concepts will give you an edge over others. Like serialisation, index, deadlock, semaphore
Tip 3 : Only mention those projects in your resume which you are very clear about. They don't ask for detailed explanation, just an overall idea about your projects will increase your chances

Application process
Where: Campus
Eligibility: 7 CGPA
Resume Tip
Resume tip

Tip 1 : Mention college projects wisely. No need to mention fancy projects. Any project that you can describe to the interviewer will be a best solution
Tip 2 : Neat & clean resume with your skills, technical stacks that you mastered. That's all. They don't require you to be very active in extra-curricular activities, and these things will not give you any advantage.
Tip 3 : Keep it of single page

Interview rounds
01
Round
Medium
Online Coding Interview
Duration90 minutes
Interview date30 Jul 2019
Coding problem1

Coding question of medium level difficulty, from DP. 
18 MCQs were core CSE related concepts e.g: OS, OOPs, DBMS, Networking
Time was 90 minutes.

1. Minimum Cost to Destination
Hard
41m average time
30% success
0/120
Asked in companies
AckoBarclaysZomato

You have been given an N*M matrix where there are 'N' rows and 'M' columns filled with '0s' and '1s'.


&...

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Problem approach

Simple DP Question.
Used a 2D memoization array.
I used top down approach, bottom up is also easily applicable for this.

Try solving now
02
Round
Medium
Face to Face
Duration30 minutes
Interview date2 Aug 2019
Coding problem2

It was an one-to-one interview. It checks your problem solving ability and a few OOPs, OS, DBMS etc concepts. Coding questions were related to array, queue and DP.

1. Possible to form a triangle
Easy
15m average time
80% success
0/40
Asked in companies
Phone PeIndiaMartOYO

You are given an integer of array/list 'ARR' of length ‘N. You are supposed to return true if it is possible to construct at least one non-degenerate tri...

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Problem approach

Sort the array.
Use two pointer concept.

Try solving now
2. Maximum sum such that no two elements are adjacent
Moderate
15m average time
85% success
0/80
Asked in companies
Paytm (One97 Communications Limited)OLX GroupExpedia Group

You are given an array/list of ‘N’ integers. You are supposed to return the maximum sum of the subsequence with the constraint that no two elements are adjacent in the given array/list.

Not...
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Try solving now
03
Round
Easy
Face to Face
Duration45 minutes
Interview date2 Aug 2019
Coding problem3

It was also a problem solving round. However after coding questions, they also asked CSE conceptual questions.

1. Sum Tree
Moderate
29m average time
0/80
Asked in companies
InfosysOracleAmazon

For a given binary tree, convert it to its sum tree. That is, replace every node data with sum of its immediate children, keeping leaf nodes 0. Finally, return its preorder.

For example:
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Try solving now
2. OS Questions

Core concepts like deadlock, semaphore, memory management

Problem approach

Tip 1: Galvin is a must read.
Tip 2: Memory management is very important
Tip 3: Practice for writing the implementation of semaphores, readers writers problem

3. DBMS Question

Core concepts like indexing

Problem approach

Tip 1: Practice writing SQL queries.
Tip 2: Serialisation is important.

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