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Ola Cabs SDE (Software Development Engineer) Interview Questions and Answers
Ola Cabs SDE (Software Development Engineer) Interview Experiences
1 interview found
SDE (Software Development Engineer) Interview Questions & Answers
Divyansh Gothwal
posted on 27 Jan 2017
I was interviewed in Dec 2016.
Interview Questionnaire
4 Questions
- Q1. Maximum sum rectangle in a 2D matrix (-----/)
- Ans.
Find the maximum sum of a rectangle in a 2D matrix.
Use Kadane's algorithm to find the maximum sum subarray in each row.
Iterate over all possible combinations of rows and find the maximum sum rectangle.
Keep track of the maximum sum and the coordinates of the rectangle.
- Q2. Implement 3 stacks using one array(with space and time complexity optimised)
- Ans.
Implement 3 stacks using one array with optimized space and time complexity.
Divide the array into three equal parts to represent each stack.
Keep track of the top index of each stack separately.
When pushing an element, increment the top index of the respective stack and store the element.
When popping an element, retrieve the element from the top index of the respective stack and decrement the top index.
Handle stack over
- Q3. Sort array of 0,1,2 in O(n):time complexity and O(1): space complexity
- Ans.
Dutch National Flag algorithm can be used to sort an array of 0, 1, and 2 in O(n) time complexity and O(1) space complexity.
Initialize three pointers: low, mid, and high.
Iterate through the array and swap elements based on their values.
Increment low and mid pointers when encountering 0.
Increment mid pointer when encountering 1.
Decrement high pointer when encountering 2.
- Q4. Questions related to database, multi-threading,design patterns
Interview Preparation Tips
Duration: 2 hours
Total Questions: 1
Skills: Data Strutures, Algorithmic Approach To Problem Solving
College Name: IIT Roorkee
Skills evaluated in this interview
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SDE (Software Development Engineer) Interview Questions & Answers
Flipkart
Anonymous
posted on 15 Feb 2022
It was a 60 min coding test, with 2 dsa questions.
(1 Question)
- Q1. Round 2 was a code pair round. Whith question around DP, Trees and heaps.
(1 Question)
- Q1. They as me the LLD of library management system, with afuntional code
Interview Preparation Tips
MY aptitude round was on naukrii.com , which I cleared.
(2 Questions)
- Q1. Questions were asked on OOPS Concept, Make sure you should have a strong command on oops.
- Q2. 1 DSA Question and they told me to write the code on whiteboard
(2 Questions)
- Q1. It was technical interview, she asked me about my project and asked me to tell test cases on my project.
- Q2. 1 dsa question, 2 strings anagram, and other pattern question
(2 Questions)
- Q1. It was with qa lead of infoedge company. she told me to tell test cases of chair.
- Q2. She asked me about testing and all.
(1 Question)
- Q1. AAbhi hua nhi hai, jab hoga toh bata dungi.
I applied via LinkedIn and was interviewed in Nov 2024. There was 1 interview round.
(2 Questions)
- Q1. Minimum Knight Moves (LC Medium)
- Q2. OS, CN, DB concepts like multithreading, semaphore, tcp vs udp, transaction and ACId properties. Java concepts like stack vs heap(memory), error vs exception. Any 1 Project discussion for 10 mins
Interview Preparation Tips
Suman S
There were 2 questions in coding one with array and in string releated
(3 Questions)
- Q1. About Selenium questions
- Q2. Other basic questions related to testing
- Q3. Management related question
(2 Questions)
- Q1. One program to solve
- Q2. Other questions in selenium
Shubham Sharma
(1 Question)
- Q1. General DSA question leetcode style
(1 Question)
- Q1. Discussion on previous project
(2 Questions)
- Q1. Java core, spring boot
- Q2. DBMS concepts
Interview Preparation Tips
Selected
I applied via Job Portal and was interviewed in Aug 2024. There were 2 interview rounds.
DSA + JAVA + Spring boot
LLD (bookmyshow) + DSA
Interview Preparation Tips
- Spring batch
- spring Jpa
- Transactions
- Microservices
(2 Questions)
- Q1. React hooks implemetation
- Q2. Node event loop
Interview Preparation Tips
It was a medium-level DSA round
This was also a DSA round
This again a DSA round
(1 Question)
- Q1. Can't disclose the question because of NDA signed but it was a design round
(1 Question)
- Q1. This was a project discussion round
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