Ola Cabs Sdet Lead Interview Questions and Answers

Q1. Medium level problem solving questions were asked which was basically related to string and arrays, DS
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Puzzles aptitude check

Puzzles syntax check

Q1. Selenium,Rest assured ,API,java
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Coding conecpt, apti

Q1. Basic dsa, puzzles
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Q1. Basic dsa, dbms
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Very Easy questions just do it

Q1. What is your introduction
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Q2. Why SDE 1 only not SDE 2
Ans. 
SDE 1 is an entry-level position where candidates gain foundational skills before advancing to SDE 2.
• SDE 1 focuses on learning and building foundational skills in software development.

• SDE 2 requires more experience and expertise in software development.

• Advancing from SDE 1 to SDE 2 is a common career progression in tech companies.

• SDE 1 roles often involve working on smaller projects or components of larger projects.

• SDE...read more
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Q3. If bully happens will you bully someone
Ans. 
No, I believe in standing up against bullying and supporting those who are being bullied.
• I do not support bullying in any form and believe in treating others with respect and kindness.

• I would try to intervene and help the person being bullied, either by talking to the bully or seeking help from a teacher or supervisor.

• I believe in creating a positive and inclusive environment where everyone feels safe and respected.
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Q4. If taken leave can you work 7 days a week
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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...read more
Ans. 
As the array was sorted we can make use of this information to use Binary Search.


// EXPLANATION:-
// Suppose array is [1, 1, 2, 2, 3, 3, 4, 5, 5]
// we can observe that for each pair, 
// first element takes even position and second element takes odd position
// for example, 1 is appeared as a pair,
// so it takes 0 and 1 positions. similarly for all the pairs also.

// this pattern will be missed when single element is ...read more
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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...read more
Ans. 
Tip 1 : Ask clarification questions
Tip 2 : Try and think in terms of brute force and then gradually optimize your solution
Tip 3 : Ensure to check for edge cases
Tip 4 : Ensure to be thorough with data structures, algorithms and system design concepts.
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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?
Ans. 
Ensure that you are thorough with the design of your project at your current organization.
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Q1. Data structure related question
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Q1. Nodejs related questions
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Q2. Promises Async Await Events emitter
Ans. 
Promises, async/await, and event emitters are all ways to handle asynchronous operations in JavaScript.
• Promises provide a way to handle asynchronous operations by returning a promise object that can be resolved or rejected.

• Async/await is a syntax for working with promises that makes code easier to read and write.

• Event emitters allow you to create custom events that can be triggered and listened for in your code.
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Q1. System design related question
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Q2. Design a system like facebook
Ans. 
Design a system like Facebook
• Create a user registration and login system

• Implement a news feed for users to see updates from friends

• Allow users to create and join groups

• Include features like messaging, commenting, and liking posts

• Implement privacy settings for users to control who can see their content
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Q1. System design and behavioral
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Q1. Gasstation problem on letcode
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Q2. LCS problem on leetcode
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