AQR Capital Management Software Developer Interview Questions and Answers

It was angular and java

Q1. A question about dbms etc
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70 minutes test, and 4 questions

Q1. Behavioural Queston
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Aptitude test question for credit Agricole company

Must contain some questions which will be considered as a qualifier test for next round .it will have some passout marks to get into a next round .

Q1. About skills and communication skills
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Q1. About introduction and some questions related to job
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Q1. Design a LLD of portfolio management system where you can add any stock to your portfolio sell any stock. calculate % return on your port folio. list your portfolio which is stocks with current prices and ...read more
Ans. 
Design a portfolio management system to add and sell stocks, calculate returns, and display current prices and returns.
• Create a class for the portfolio with methods to add and sell stocks

• Implement a method to calculate the percentage return on the portfolio

• Maintain a list of stocks in the portfolio with their current prices and returns

• Use arrays or lists to store the portfolio data

• Ensure proper error handling for inval
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Q2. Design a referal bonus system.
Ans. 
Design a referral bonus system.
• Define the criteria for a successful referral

• Determine the bonus amount or reward for successful referrals

• Create a tracking system to monitor referrals

• Establish a process for verifying and approving referrals

• Communicate the referral program to employees or users

• Implement a mechanism for distributing the referral bonus
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Round duration - 70 Minutes
Round difficulty - Hard

The test link was active for a week, and you can give anytime you like. The IDE was very good and self explanatory. There were 2 coding questions and 15 aptitude questions.

Q1. 
Unweighted Graph Shortest Path Problem
You are tasked with finding the shortest path between two houses in the city of Ninjaland, represented as an unweighted graph. The city has N houses numbered from 1 ...read more
Ans. 
This is a straight forward application of Floyd Warshal algorithm
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Q2. 
Check If Two Nodes Are Cousins
You are given an arbitrary binary tree consisting of N nodes, where each node is associated with a certain value, and two node values, a and b. Your task is to determine if ...read more
Ans. 
This was a modified version of DFS on tree and storing the results in a dp to avoid recalculation.
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Round duration - 60 Minutes
Round difficulty - Medium

It contained two programming questions.

Q1. 
Counting Nodes in a Complete Binary Tree - Problem Statement
Given the root of a complete binary tree, calculate the total number of nodes in this tree.
A complete binary tree is defined as a binary tree...read more
Ans. 
The basic solution of this problem is easy. You just need to do a level order traversal of the tree and wherever you find the first vacant spot, you can enter the node there.
The trick was to find the optimal solution. You need to use the property of almost full binary tree. Knowing the value of the node to enter, you can directly eliminate one side of the tree and just traverse the other side of the tree.
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Q2. 
Rearrange Array Numbers for Largest Possible Number
Given an array ARR consisting of non-negative integers, rearrange the numbers to form the largest possible numerical value. You are not permitted to alt...read more
Ans. 
This was a standard array manipulation problem. You just need to find the cases that should be satisfied by the second largest number.
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Round duration - 60 Minutes
Round difficulty - Medium

This was more of a interaction round with some technical skills.

Q1. Can you explain the ACID properties and the rollback mechanism in DBMS?
Ans. 
Tip 1 : Focus on the basics of DBMS 
Tip 2 : Try applying the DBMS concepts on the problems at hand.
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Q1. Types of garbage collectors
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Q1. Salary negotiation
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Tell me about a time where you resolve a conflict

Reverse a string, identify anagram