PharmEasy Backend Developer Interview Questions and Answers

Q1. DSA Medium difficulty question Schema Design Low level design Amazon reviews page
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It was on-campus placement interview.
Two rounds of interview were there and both were of DSA (DP and sorting algo).

Q1. LLD question - Design a cab booking system
Ans. 
A cab booking system allows users to book rides, track drivers, and manage payments efficiently through a user-friendly interface.
• User Registration: Users can create accounts to manage their bookings and payment methods.

• Ride Booking: Users can input their pickup and drop-off locations to request a ride.

• Driver Matching: The system matches users with nearby drivers based on location and availability.

• Real-Time Tracking: U...read more
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Q2. HLD question - How will you manage a flash sale in multitheaded environment.
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Managing a flash sale in a multithreaded environment requires careful coordination to handle high traffic and prevent overselling.
• Load Balancing: Distribute incoming requests across multiple servers to handle high traffic efficiently, ensuring no single server is overwhelmed.

• Database Locking: Use optimistic or pessimistic locking mechanisms to prevent race conditions when updating inventory during the sale.

• Queueing Sys...read more
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Given two soted arrays merge them from a single sorted array with all items in non-decreassing order

3 Leetcode style questions , 2 medium , 1 hard .

Q1. Design a cab booking system using oops
Ans. 
A cab booking system designed using OOP principles
• Create classes for Cab, Customer, Driver, and Booking

• Use inheritance and polymorphism to handle different types of cabs and bookings

• Implement methods for booking a cab, assigning a driver, and calculating fare

• Use encapsulation to protect data and ensure data integrity
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First round was coding test in online mode which was quite easy.

Q1. In the 2nd round they asked the technical questions from SQL , simple coding questions.
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Questions from arrays and strings and some aptitude questions

Q1. How to merge 2 csv files
Ans. 
To merge two CSV files, you can use software like Microsoft Excel or programming languages like Python.
• Open both CSV files in a software like Microsoft Excel.

• Copy the data from one CSV file and paste it into the other CSV file.

• Save the merged CSV file with a new name.

• Alternatively, you can use programming languages like Python to merge CSV files by reading both files, combining the data, and writing to a new file.
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Q2. Basic questions on arrays
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Q1. 3 reasons why u choose this company
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I applied to this company because of its reputation in the industry, opportunities for growth, and company culture.
• Reputation in the industry - I have heard great things about the company's innovative projects and successful track record.

• Opportunities for growth - The company offers various training programs and career advancement opportunities for employees.

• Company culture - I value a positive work environment and the...read more
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Q1. Questions on python
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