Stripe Software Developer Intern Interview Questions and Answers

Basic coding language and database related MCQ

Some mid complex problems

Q1. Can be related to data used in your or skills-knowledge mentioned in it.
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Q2. SQL questions like inner join & outer join query etc.
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Q3. HLD & LLD concepts
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Q4. Sample code for some problems company frequently needs to solve in ongoing projects. E.g. payment gateway
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Q1. Salary negotiation and employee benefits with tax deduction.
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75 min test with 18 Java theory questions

Q1. Synchronized keyword usage
Ans. 
The synchronized keyword in Java is used to control access to shared resources in a multithreaded environment.
• Synchronized keyword can be used to synchronize access to critical sections of code to prevent race conditions.

• It can be applied to methods or code blocks to ensure only one thread can access them at a time.

• Example: synchronized void myMethod() { // code }

• Example: synchronized(this) { // code }
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Q2. Message Queue types
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Q3. Thread Contention
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Q4. Java Profiling Tools
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Q5. Abstract classes
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Q1. Technical questions
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Q1. Technical Questions
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Q1. Salary Discussion
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Round duration - 90 minutes
Round difficulty - Medium

Contained mix of coding, oops and general programming questions

Coding was live coding round
It was around 12pm
They used their own coding environment, I coded in java

Q1. 
Maximum Subarray Sum Problem Statement
Given an array arr of length N consisting of integers, find the sum of the subarray (including empty subarray) with the maximum sum among all subarrays.
Explanation...read more
Ans. 
Find the sum of the subarray with the maximum sum among all subarrays in an array of integers.
• Iterate through the array and keep track of the maximum sum subarray seen so far.

• Use Kadane's algorithm to efficiently find the maximum subarray sum.

• Consider the case where all elements in the array are negative.

• Handle the case where the array contains only one element.
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Round duration - 90 Minutes
Round difficulty - Hard

It was a collection of HLD AND LLD
Was around 12pm
This was conducted on bluejeans

Q1. Design a URL shortener with a database and all necessary components.
Ans. 
Design a URL shortener with database and necessary components
• Use a unique identifier for each URL to generate short links

• Store the original URL and corresponding short link in a database

• Implement a redirect mechanism to redirect short links to original URLs

• Consider implementing analytics to track usage and performance

• Ensure scalability and reliability of the system
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Round duration - 60 Minutes
Round difficulty - Easy

It was a friendly managerial round with director of my team, he was very for me to come on board and explained truthfully how payu is.

Round duration - 30 Minutes
Round difficulty - Easy

Just a normal HR discussion, he informed me that I've been selected and we discussed about the salary part

Q1. Can you describe your experience working in a corporate environment?
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Q1. Just to know more about why i want the role
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Testing an payment flow on the application

Q1. DSA round containing 2 coding questions along with some Java Questions
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Q1. Design Round along with some puzzles
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Q1. Managerial Round
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