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DE Shaw Interview Questions and Answers
168 Interview questions
A browser history class manages URLs visited, allowing navigation and storage of history efficiently.
Use a doubly linked list to allow easy addition and removal of URLs.
Maintain a pointer to the current page for easy back and forward navigation.
Implement methods like visit(url), back(), forward() to manage history.
Example: visit('example.com') adds to history; back() moves to the previous URL.
A SQL query that joins three tables to retrieve related data efficiently.
Use INNER JOIN to combine rows from three tables based on related columns.
Example: SELECT a.column1, b.column2, c.column3 FROM tableA a INNER JOIN tableB b ON a.id = b.a_id INNER JOIN tableC c ON b.id = c.b_id;
Consider using LEFT JOIN if you want to include all records from one table even if there are no matches in the others.
Ensure that the ...
TDS stands for Tax Deducted at Source, a system where tax is deducted by the payer at the time of making payment.
TDS is a system introduced by the Income Tax Department of India to collect tax at the source from where an individual's income is generated.
It is applicable to various payments such as salary, interest, commission, rent, etc.
The deducted TDS amount is then deposited to the government by the deductor.
TD...
GST on reverse charge is a mechanism where the recipient of the goods/services is liable to pay the tax instead of the supplier.
Under reverse charge mechanism, the recipient of the goods/services is responsible for paying the GST instead of the supplier.
It is applicable in certain cases like import of services, specified goods/services, etc.
The recipient needs to self-assess and pay the tax directly to the governm...
Documents required for foreign remittance include identification proof, proof of address, and purpose of remittance.
Identification proof such as passport or driver's license
Proof of address like utility bill or bank statement
Purpose of remittance document like invoice or agreement
Group list of strings as anagrams and return the list.
Create a hashmap to store sorted strings as keys and list of anagrams as values
Iterate through the list of strings, sort each string and add it to the corresponding list in the hashmap
Return the values of the hashmap as the grouped anagrams
I am a dedicated QA Engineer with a passion for ensuring software quality through meticulous testing and problem-solving skills.
Over 5 years of experience in software testing, focusing on both manual and automated testing.
Proficient in using testing tools like Selenium and JIRA for tracking defects and managing test cases.
Experience in developing test plans and test cases for various applications, including web an...
I tackled a scheduling conflict during a group project by reorganizing tasks and improving communication among team members.
Identified the scheduling conflict during our weekly meetings.
Proposed a new timeline that accommodated everyone's availability.
Implemented a shared online calendar for better coordination.
Encouraged open communication to address any further issues.
Test scenarios for testing WhatsApp application
Verify sending a text message
Test sending multimedia files (images, videos)
Check group chat functionality
Test voice and video call features
Verify message encryption and security measures
Implement LFU cache using OOPs concepts
Create a class for LFU cache with methods like get, put, and remove
Use a hashmap to store key-value pairs and a hashmap to store frequency of each key
Implement a doubly linked list to store keys with the same frequency
DE Shaw Interview Experiences
124 interviews found
Anonymous
Interview Questionnaire
21 Questions
- Q1. Hobbies and interests
- Q2. Questions regarding java
- Q3. OOP concepts in Java
- Ans.
OOP concepts in Java
Encapsulation - hiding implementation details
Inheritance - creating new classes from existing ones
Polymorphism - ability of objects to take on multiple forms
Abstraction - focusing on essential features and ignoring the rest
Example: A Car class can inherit from a Vehicle class
Example: A Dog class can have a bark() method that overrides the Animal class's makeSound() method
Example: A Shape class can h...
- Q4. OOP Java Design problems
- Ans.
Answering OOP Java design problems
Identify the problem domain and create a class hierarchy
Use encapsulation to hide implementation details
Apply inheritance to reuse code and create subtypes
Implement polymorphism to allow objects to take on multiple forms
Avoid tight coupling and favor composition over inheritance
Use design patterns to solve common problems
Consider SOLID principles for maintainable code
- Q5. C++ Virtual Functions
- Q6. What is the difference between C and C++?
- Ans.
C++ is an extension of C with object-oriented programming features.
C++ supports classes and objects while C does not.
C++ has better support for polymorphism and inheritance.
C++ has a standard template library (STL) which C does not have.
C++ allows function overloading while C does not.
C++ has exception handling while C does not.
- Q7. What is inheritance?
- Ans.
Inheritance is a mechanism in object-oriented programming where a new class is created by inheriting properties of an existing class.
Inheritance allows code reusability and saves time and effort in programming.
The existing class is called the superclass or parent class, and the new class is called the subclass or child class.
The subclass inherits all the properties and methods of the superclass and can also add its own...
- Q8. What is the difference between default and copy constructor?
- Ans.
Default constructor is provided by the compiler if no constructor is defined. Copy constructor creates a new object by copying an existing object.
Default constructor initializes member variables to default values.
Copy constructor creates a new object with the same values as an existing object.
Default constructor is called automatically by the compiler if no constructor is defined.
Copy constructor is called when an obje...
- Q9. What are access specifiers?
- Ans.
Access specifiers are keywords in object-oriented programming languages that determine the visibility and accessibility of class members.
Access specifiers are used to restrict access to class members.
There are three types of access specifiers: public, private, and protected.
Public members can be accessed from anywhere in the program.
Private members can only be accessed within the class.
Protected members can be accessed...
- Q10. What is library functions?
- Ans.
Library functions are pre-written code that can be reused to perform common tasks.
Library functions save time and effort by providing pre-written code.
They are often included in programming languages or external libraries.
Examples include functions for string manipulation, mathematical calculations, and file input/output.
Library functions can be called from within a program to perform specific tasks.
They can also be cu...
- Q11. What is the difference between DML and DLL?
- Ans.
DML is Data Manipulation Language used to manipulate data in a database. DLL is Data Definition Language used to define database schema.
DML is used to insert, update, delete data in a database.
DLL is used to create, alter, drop database objects like tables, views, indexes.
DML statements include INSERT, UPDATE, DELETE.
DLL statements include CREATE, ALTER, DROP.
DML affects data in a database, DLL affects the structure of...
- Q12. What is the difference between primary key and unique key?
- Ans.
Primary key uniquely identifies a record in a table, while unique key ensures that all values in a column are distinct.
Primary key can't have null values, while unique key can have one null value.
A table can have only one primary key, but multiple unique keys.
Primary key is used as a foreign key in other tables, while unique key is not.
Example: Primary key - employee ID, Unique key - email address.
- Q13. What is a stack?
- Ans.
A stack is a data structure that follows the Last-In-First-Out (LIFO) principle.
Elements are added to the top of the stack and removed from the top.
Common operations include push (add element) and pop (remove element).
Stacks can be implemented using arrays or linked lists.
Examples include the call stack in programming and the undo/redo feature in text editors.
- Q14. What is an Assembly?
- Ans.
Assembly is a low-level programming language that is used to write programs that can directly interact with computer hardware.
Assembly language is specific to a particular computer architecture.
It is a low-level language that is difficult to read and write.
Assembly language programs are faster and more efficient than programs written in high-level languages.
Examples of assembly language include x86, ARM, and MIPS.
Assem...
- Q15. What are class access modifiers?
- Ans.
Class access modifiers are keywords used to control the visibility and accessibility of class members.
There are four access modifiers in Java: public, private, protected, and default
Public members can be accessed from anywhere
Private members can only be accessed within the same class
Protected members can be accessed within the same class, subclasses, and same package
Default members can be accessed within the same packa...
- Q16. What is serialization?
- Ans.
Serialization is the process of converting an object into a format that can be stored or transmitted.
Serialization is used to save the state of an object and recreate it later.
It is commonly used in network communication to transmit data between different systems.
Examples of serialization formats include JSON, XML, and binary formats like Protocol Buffers.
Deserialization is the opposite process of converting serialized...
- Q17. What is the purpose of Normalisation?
- Ans.
Normalisation is the process of organizing data in a database to reduce redundancy and improve data integrity.
Normalisation helps to eliminate data redundancy and inconsistencies
It ensures that each piece of data is stored in only one place
It helps to improve data integrity and accuracy
It makes it easier to maintain and update the database
There are different levels of normalisation, each with its own set of rules and g...
- Q18. What is the difference between Truncate and Delete?
- Ans.
Truncate removes all data from a table while Delete removes specific data from a table.
Truncate is faster than Delete as it doesn't log individual row deletions.
Truncate resets the identity of the table while Delete doesn't.
Truncate can't be rolled back while Delete can be.
Truncate doesn't fire triggers while Delete does.
- Q19. What is the difference between DBMS and RDBMs?
- Ans.
DBMS is a software system to manage databases while RDBMS is a type of DBMS that uses a relational model.
DBMS stands for Database Management System while RDBMS stands for Relational Database Management System.
DBMS can manage any type of database while RDBMS uses a relational model to manage data.
DBMS does not enforce any specific data model while RDBMS enforces a relational data model.
Examples of DBMS include MongoDB, ...
- Q20. What is Recursion Function?
- Ans.
Recursion function is a function that calls itself until a base condition is met.
Recursion is a technique used to solve problems by breaking them down into smaller sub-problems.
It involves a function calling itself with a modified input until a base case is reached.
Recursion can be used to solve problems such as factorial, Fibonacci series, and binary search.
Recursion can be implemented using loops as well, but it may ...
- Q21. Interview with the Director
Interview Preparation Tips
Experience: Initially they took an online round but due to some network problem, they had to scrap it. Next morning, they came up with a paper based round. There were 2 sections. One was aptitude and one was coding, both being objective type. The aptitude section was as lengthy as difficult. No one could have solved all 30 questions in 30 minutes time. Infact, I was only able to attempt 10. Next 40 minutes or so was reserved for the coding test. The questions they asked covered almost all the topics they mentioned in their pre-placement presentation. But the maximum number of questions were related to getting output or finding errors in C, C++ and JAVA codes. The questions they asked from theoretical subjects were more or less the basics and easy. In those questions (which were quite a few in number), you will be given a huge chunk of code with some part missing and you have to identify which snippet among the options best fits in there. Sometimes its given what the code is supposed to do, but in some questions it was also your task to find out. So I think the differentiating factor is how well your actual coding skills are. And you need to know these 3 languages atleast – C, C++ and JAVA. Again, similar to aptitude section the coding section was also very lengthy with some programs extending upto 1 or more pages. I’d recommend to skip those programs initially and jump to other easy problems first. Then if you have time, you can come back and attempt them.In the end of the coding round, they had one special subjective test in which they asked you to write the full code in any language for the give problem statement. In my case, the problem was : “Given a tree, find the depth of the largest binary search tree it contains.” I know it sounds simple enough but only until you start coding it. And while writing codes of such problems, make sure to display your data-structures and algorithmic skills and not your knowledge of STL libraries. Even if you’re not able to solve the problem and you used some complicated data structures (by using, I mean you created them from scratch without any help from STL libraries) and some good algorithms, then they are likely to appreciate your coding skills if not your problem-solving skills. And just a hint although I think you already know this – BST are the favourites of all software companies . Overall, I sat for 2 companies including Amazon and both of them had a coding problem related to BST only.
Duration: 70 minutes
Total Questions: 2
Round: HR Interview
Experience: Anyways, then there were usual HR questions like your hobbies, interests, family background, history of my town, etc. He did ask me some technical questions also like on seeing the word ‘Hacking’ in my resume, we started discussing upon hacking, its types and laws related to it.
Round: Technical Interview
Experience: They started off with puzzles, which were quite easy and common ones. Then only after 2 puzzles they started asking me about my favourite subject and language. I told them OS, Networks and C++. But instead they asked me all about Java ! I kept telling them I hadn’t revised Java but that didn’t help. They’ll ask some question and I’ll write the code in C++ and they would ask me to convert it to Java. They’d also ask the equivalents of C++ OOP concepts in Java. Its not that I know nothing of Java, I have actually done a lot of coding in it, but that day and time, I was totally unprepared. So I kept guessing a lot based on my poor memory and later to my surprise, I found I got many of them right .They also asked some design questions in which they asked me to write the class and related functions (just the prototypes) for implementing a parking lot management system. Then there were questions on hacking and security. They also asked about the network problem they faced the previous day when the online round was going on, due to which they had to scrap it. They asked what could be the reason behind it and what could be the solution. Overall, again the majority of the questions were coding type with C++ concepts like virtual functions, JAVA OOP, and design problems. This round went on for 15-20 minutes past 1 hour or so.
Round: Behavioural Interview
Experience: Finally, after few hours I was called for my last interview round. It was more like a casual round in which the D.E.Shaw associate director was taking my interview. The first thing he said was “I just wanted to meet you once myself” and he asked a few HR questions again. He asked me if I had any higher studies plan, my strengths and 2 weaknesses, why their company, etc. It was a cool round with the atmosphere also easy and it went on for just 20 minutes or so.
Skill Tips: Criteria :Cs/IT/ECE And CGPA min of 7.0[CSE] .For ECE =7.5
D. E. Shaw generally prefers computer science branch students but they’re not as strict as Amazon or Google and for for CS students it was only 7.0 . Luckily, my CGPA was above the cutoff and I was allowed to sit for the process.
Skills: C++, Java, DBMS, OOP
College Name: BITS PILANI
Skills evaluated in this interview
(6 Questions)
- Q1. Tell me about youtself?
- Ans.
I am a dedicated and experienced professional with a strong background in project management and team leadership.
Over 10 years of experience in project management
Proven track record of successfully leading cross-functional teams
Strong communication and interpersonal skills
Certified in project management (PMP)
Previously managed a project with a budget of $1 million
- Q2. What do you know about TDS?
- Ans.
TDS stands for Tax Deducted at Source, a system where tax is deducted by the payer at the time of making payment.
TDS is a system introduced by the Income Tax Department of India to collect tax at the source from where an individual's income is generated.
It is applicable to various payments such as salary, interest, commission, rent, etc.
The deducted TDS amount is then deposited to the government by the deductor.
TDS rat...
- Q3. Situation AP based journal entries
- Q4. What is GST on reverse charge?
- Ans.
GST on reverse charge is a mechanism where the recipient of the goods/services is liable to pay the tax instead of the supplier.
Under reverse charge mechanism, the recipient of the goods/services is responsible for paying the GST instead of the supplier.
It is applicable in certain cases like import of services, specified goods/services, etc.
The recipient needs to self-assess and pay the tax directly to the government.
I...
- Q5. What are the documents required to initiate a foreign remittance?
- Ans.
Documents required for foreign remittance include identification proof, proof of address, and purpose of remittance.
Identification proof such as passport or driver's license
Proof of address like utility bill or bank statement
Purpose of remittance document like invoice or agreement
- Q6. More situational based AP journal entries.
I appeared for an interview in Aug 2024.
(2 Questions)
- Q1. Behavioural Questions
- Q2. Scenario Based Questions
(2 Questions)
- Q1. Scenario Based Questions
- Q2. Guestimates
(1 Question)
- Q1. Role Based & Work Experience Based
Interview Preparation Tips
When I inquired with the panelists about the roles and responsibilities associated with this position and the projects, they mentioned that they were still figuring it out. If that is the case, why waste others' time?
I applied via Campus Placement and was interviewed in Sep 2024. There were 3 interview rounds.
2 Coding questions - medium to hard
(2 Questions)
- Q1. Questions on scalable systems.
- Q2. Medium level DSA questions.
(2 Questions)
- Q1. Questions on SQL
- Q2. Implement LFU using OOPs concepts from scratch.
- Ans.
Implement LFU cache using OOPs concepts
Create a class for LFU cache with methods like get, put, and remove
Use a hashmap to store key-value pairs and a hashmap to store frequency of each key
Implement a doubly linked list to store keys with the same frequency
Skills evaluated in this interview
(2 Questions)
- Q1. Given list of strings, group them as anagrams and return the list.
- Ans.
Group list of strings as anagrams and return the list.
Create a hashmap to store sorted strings as keys and list of anagrams as values
Iterate through the list of strings, sort each string and add it to the corresponding list in the hashmap
Return the values of the hashmap as the grouped anagrams
- Q2. Questions on OOP and what is static and final keyword
I applied via Company Website and was interviewed in Nov 2024. There was 1 interview round.
(2 Questions)
- Q1. Performance Testing
- Q2. Difference between put and patch
I applied via LinkedIn and was interviewed in Sep 2024. There were 3 interview rounds.
2hour test comprising of quant, reasoning and behavioral question.
(1 Question)
- Q1. CV based and basic finance question
(1 Question)
- Q1. Current affair round
(1 Question)
- Q1. Design zepto delivery system .
- Ans.
Design a zepto delivery system for efficient and fast delivery of small packages.
Utilize drones for quick and efficient delivery
Implement a centralized hub for package sorting and distribution
Use GPS tracking for real-time package monitoring
Optimize routes for faster delivery times
Ensure secure and reliable delivery process
I appeared for an interview in May 2025, where I was asked the following questions.
- Q1. Background work exp
- Q2. Fin statements check
I appeared for an interview in May 2025, where I was asked the following questions.
- Q1. System design question related to cache and DB , test scenarios to test that system.
- Q2. Sql query using 3 table join ,
- Ans.
A SQL query that joins three tables to retrieve related data efficiently.
Use INNER JOIN to combine rows from three tables based on related columns.
Example: SELECT a.column1, b.column2, c.column3 FROM tableA a INNER JOIN tableB b ON a.id = b.a_id INNER JOIN tableC c ON b.id = c.b_id;
Consider using LEFT JOIN if you want to include all records from one table even if there are no matches in the others.
Ensure that the join ...
- Q3. Design browser history class and tell the data structure to be used
- Ans.
A browser history class manages URLs visited, allowing navigation and storage of history efficiently.
Use a doubly linked list to allow easy addition and removal of URLs.
Maintain a pointer to the current page for easy back and forward navigation.
Implement methods like visit(url), back(), forward() to manage history.
Example: visit('example.com') adds to history; back() moves to the previous URL.
I applied via Campus Placement and was interviewed in Jul 2024. There were 2 interview rounds.
Binary Search & Dynamic Programming
(2 Questions)
- Q1. Explain Projects and queries regarding them
- Ans.
Projects and queries involve understanding and working on various software projects and related inquiries.
Projects involve developing, testing, and maintaining software applications.
Queries may include troubleshooting issues, optimizing performance, and implementing new features.
Examples of queries include debugging a software bug, improving code efficiency, and integrating a new API.
- Q2. DSA questions like Backtracking
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